1 | #pragma rtGlobals=1 // Use modern global access method. |
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2 | |
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3 | // SASCALC.ipf |
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4 | // |
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5 | // 04 OCT 2006 SRK |
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6 | // 30 OCT 2006 SRK - corrected beamDiameter size in attenuator calculation (Bh vs Bm) |
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7 | // 11 DEC 2006 SRK - added 2.5 cm A1 option for NG3@7guide config |
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8 | // 09 MAR 2007 SRK - now appends text of each frozen configuration for printing |
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9 | // - colorized frozen traces so that they aren't all red (unfrozen is black) |
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10 | // |
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11 | // calculate what q-values you get based on the instruments settings |
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12 | // that you would typically input to SASCALC |
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13 | // calculation is for (80A radius spheres) * (beam stop shadow factor) |
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14 | // or a Debye function (Rg=50A) * (beam stop shadow factor) |
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15 | // - NOT true intensity, not counts, just a display |
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16 | // |
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17 | // To Do: |
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18 | // - add in instrument conditions for lens/(lens+prism) configurations |
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19 | // - proper resolution calculation for lens/prism |
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20 | // - don't use the corners... misleading high Q limit (just max horiz?) - make a default mask |
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21 | |
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22 | // |
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23 | // Optional: |
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24 | // - freeze configurations with a user defined tag |
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25 | // - different model functions (+ change simple parameters) |
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26 | // - resolution smeared models |
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27 | // - "simulation" of data and error bars given a model and a total number of detector counts |
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28 | // - sequence of colors for frozen plots |
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29 | // - streamline code (globals needed in panel vs. wave needed for calculation) |
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30 | // |
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31 | // Done: |
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32 | // - include resolution effects (includes BS effect, smeared model) |
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33 | // - (data = 1) then multiply by a typical form factor |
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34 | // - masked two pixels around the edge, as default |
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35 | // - conversion from # guides to SSD from sascalc |
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36 | // - show multiple configurations at once |
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37 | // - interactive graphics on panel |
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38 | // - full capabilities of SASCALC |
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39 | // - correct beamstop diameter |
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40 | // - get the sample/huber position properly incorporated (ssd and sdd) |
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41 | // - get SDD value to update when switching NG7->NG3 and illegal value |
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42 | // - disallow 6 guides at NG3 (post a warning) |
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43 | // |
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44 | // |
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45 | |
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46 | Macro SASCALC() |
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47 | DoWindow/F SASCALC |
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48 | if(V_flag==0) |
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49 | S_initialize_space() |
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50 | initNG3() //start life as NG3 |
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51 | Sascalc_Panel() |
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52 | ReCalculateInten(1) |
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53 | Endif |
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54 | End |
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55 | |
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56 | Proc S_initialize_space() |
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57 | NewDataFolder/O root:SAS |
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58 | NewDataFolder/O root:myGlobals |
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59 | |
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60 | Make/O/D/N=23 root:SAS:integersRead |
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61 | Make/O/D/N=52 root:SAS:realsRead |
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62 | Make/O/T/N=11 root:SAS:textRead |
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63 | // data |
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64 | Make/O/D/N=(128,128) root:SAS:data,root:SAS:linear_data |
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65 | Make/O/D/N=2 root:SAS:aveint,root:SAS:qval |
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66 | root:SAS:data = 1 |
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67 | root:SAS:linear_data = 1 |
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68 | // fill w/default values |
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69 | S_fillDefaultHeader(root:SAS:integersRead,root:SAS:realsRead,root:SAS:textRead) |
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70 | |
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71 | // other variables |
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72 | // -(hard coded right now - look for NVAR declarations) |
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73 | Variable/G root:myGlobals:gBinWidth=1 |
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74 | |
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75 | // for the panel |
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76 | Variable/G root:SAS:gInst=3 //or 7 for NG7 |
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77 | Variable/G root:SAS:gNg=0 |
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78 | Variable/G root:SAS:gTable=2 //2=chamber, 1=table |
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79 | Variable/G root:SAS:gDetDist=1000 //sample chamber to detector in cm |
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80 | Variable/G root:SAS:gSSD=1632 //!!SSD in cm fo 0 guides (derived from Ng) |
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81 | Variable/G root:SAS:gOffset=0 |
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82 | Variable/G root:SAS:gSamAp=1.27 //samAp diameter in cm |
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83 | Variable/G root:SAS:gLambda=6 |
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84 | Variable/G root:SAS:gDeltaLambda=0.15 |
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85 | String/G root:SAS:gSourceApString = "1.43 cm;2.54 cm;3.81 cm;" |
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86 | String/G root:SAS:gDeltaLambdaStr = "0.11;0.15;0.34;" |
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87 | String/G root:SAS:gApPopStr = "1/16\";1/8\";3/16\";1/4\";5/16\";3/8\";7/16\";1/2\";9/16\";5/8\";11/16\";3/4\";" |
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88 | |
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89 | //tick labels for SDD slider |
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90 | //userTicks={tvWave,tlblWave } |
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91 | Make/O/D/N=5 root:SAS:tickSDDNG3,root:SAS:tickSDDNG7 |
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92 | Make/O/T/N=5 root:SAS:lblSDDNG3,root:SAS:lblSDDNG7 |
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93 | root:SAS:tickSDDNG3 = {133,400,700,1000,1319} |
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94 | root:SAS:lblSDDNG3 = {"133","400","700","1000","1319"} |
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95 | root:SAS:tickSDDNG7 = {100,450,800,1150,1530} |
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96 | root:SAS:lblSDDNG7 = {"100","450","800","1150","1530"} |
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97 | |
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98 | //for the fake dependency |
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99 | Variable/G root:SAS:gTouched=0 |
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100 | Variable/G root:SAS:gCalculate=0 |
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101 | //for plotting |
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102 | Variable/G root:SAS:gFreezeCount=0 |
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103 | End |
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104 | |
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105 | Function initNG3() |
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106 | |
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107 | SetDataFolder root:SAS |
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108 | |
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109 | Variable/G instrument = 3 |
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110 | Variable/G s12 = 54.8 |
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111 | Variable/G d_det = 0.5 |
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112 | Variable/G a_pixel = 0.5 |
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113 | Variable/G del_r = 0.5 |
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114 | Variable/G det_width = 64.0 |
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115 | Variable/G phi_0 = 2.95e13 |
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116 | Variable/G lambda_t = 5.50 |
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117 | Variable/G l2r_lower = 132.3 |
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118 | Variable/G l2r_upper = 1319.2 |
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119 | Variable/G lambda_lower = 2.5 |
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120 | Variable/G lambda_upper = 20.0 |
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121 | Variable/G d_upper = 25.0 |
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122 | Variable/G bs_factor = 1.05 |
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123 | Variable/G t1 = 0.63 |
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124 | Variable/G t2 = 1.0 |
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125 | Variable/G t3 = 0.75 |
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126 | Variable/G l_gap = 100.0 |
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127 | Variable/G guide_width = 6.0 |
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128 | Variable/G idmax = 100.0 |
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129 | Variable/G b = 0.023 |
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130 | Variable/G c = 0.023 |
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131 | |
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132 | //fwhm values (new variables) |
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133 | Variable/G fwhm_narrow = 0.11 |
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134 | Variable/G fwhm_mid = 0.15 |
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135 | Variable/G fwhm_wide = 0.34 |
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136 | |
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137 | //source apertures (cm) |
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138 | Variable/G a1_0_0 = 1.43 |
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139 | Variable/G a1_0_1 = 2.54 |
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140 | Variable/G a1_0_2 = 3.81 |
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141 | Variable/G a1_7_0 = 2.5 // after the polarizer |
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142 | Variable/G a1_7_1 = 5.0 |
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143 | Variable/G a1_def = 5.00 |
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144 | |
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145 | //default configuration values |
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146 | // ng = 0 |
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147 | // a1 = 3.81 |
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148 | // pos_table = 2 |
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149 | // l2r = 1310.0 |
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150 | // a2 = 1.27 |
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151 | // det_off = 0.0 |
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152 | // lambda = 6.0 |
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153 | // lambda_width = 0.15 |
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154 | Variable/G l2diff = 5.0 |
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155 | // |
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156 | SetDataFolder root: |
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157 | end |
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158 | |
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159 | Function initNG7() |
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160 | |
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161 | SetDataFolder root:SAS |
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162 | |
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163 | Variable/G instrument = 7 |
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164 | Variable/G s12 = 54.8 |
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165 | Variable/G d_det = 0.5 |
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166 | Variable/G a_pixel = 0.5 |
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167 | Variable/G del_r = 0.5 |
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168 | Variable/G det_width = 64.0 |
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169 | Variable/G phi_0 = 2.3e13 |
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170 | Variable/G lambda_t = 5.50 |
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171 | Variable/G l2r_lower = 100 |
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172 | Variable/G l2r_upper = 1531 |
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173 | Variable/G lambda_lower = 4.0 |
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174 | Variable/G lambda_upper = 20.0 |
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175 | Variable/G d_upper = 25.0 |
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176 | Variable/G bs_factor = 1.05 |
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177 | Variable/G t1 = 0.63 |
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178 | Variable/G t2 = 0.7 |
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179 | Variable/G t3 = 0.75 |
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180 | Variable/G l_gap = 188.0 |
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181 | Variable/G guide_width = 5.0 |
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182 | Variable/G idmax = 100.0 |
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183 | Variable/G b = 0.028 |
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184 | Variable/G c = 0.028 |
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185 | |
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186 | //fwhm values (new variables) |
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187 | Variable/G fwhm_narrow = 0.09 |
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188 | Variable/G fwhm_mid = 0.11 |
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189 | Variable/G fwhm_wide = 0.22 |
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190 | |
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191 | //source apertures (cm) |
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192 | Variable/G a1_0_0 = 1.43 |
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193 | Variable/G a1_0_1 = 2.22 |
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194 | Variable/G a1_0_2 = 3.81 |
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195 | Variable/G a1_7_0 = 5.0 // don't apply to NG7 |
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196 | Variable/G a1_7_1 = 5.0 |
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197 | Variable/G a1_def = 5.00 |
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198 | |
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199 | //default configuration values |
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200 | // ng = 0 |
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201 | // a1 = 2.22 |
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202 | // pos_table = 2 |
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203 | // l2r = 1530.0 |
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204 | // a2 = 1.27 |
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205 | // det_off = 0.0 |
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206 | // lambda = 6.0 |
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207 | // lambda_width = 0.11 |
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208 | Variable/G l2diff = 5.0 |
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209 | // |
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210 | SetDataFolder root: |
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211 | end |
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212 | |
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213 | Function S_fillDefaultHeader(iW,rW,tW) |
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214 | Wave iW,rW |
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215 | Wave/T tW |
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216 | |
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217 | // text wave |
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218 | // don't need anything |
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219 | |
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220 | // integer wave |
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221 | // don't need anything |
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222 | |
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223 | // real wave |
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224 | rw = 0 |
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225 | rw[16] = 64 // beamcenter X (pixels) |
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226 | rw[17] = 64 // beamcenter Y |
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227 | |
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228 | rw[10] = 5 //detector resolution (5mm) and calibration constants (linearity) |
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229 | rw[11] = 10000 |
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230 | rw[13] = 5 |
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231 | rw[14] = 10000 |
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232 | |
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233 | rw[20] = 65 // det size in cm |
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234 | rw[18] = 6 // SDD in meters (=L2) |
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235 | |
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236 | rw[26] = 6 //lambda in Angstroms |
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237 | rw[4] = 1 //transmission |
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238 | |
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239 | rw[21] = 76.2 //BS diameter in mm |
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240 | rw[23] = 50 //A1 diameter in mm |
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241 | rw[24] = 12.7 //A2 diameter in mm |
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242 | rw[25] = 7.02 //L1 distance in meters (derived from number of guides) |
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243 | rw[27] = 0.11 //DL/L wavelength spread |
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244 | |
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245 | return(0) |
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246 | End |
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247 | |
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248 | |
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249 | Window SASCALC_Panel() |
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250 | |
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251 | PauseUpdate; Silent 1 // building window... |
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252 | String fldrSav0= GetDataFolder(1) |
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253 | SetDataFolder root:SAS: |
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254 | Display /W=(5,44,463,570)/K=1 aveint vs qval as "SASCALC" |
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255 | DoWindow/C SASCALC |
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256 | SetDataFolder fldrSav0 |
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257 | ModifyGraph cbRGB=(49151,53155,65535) |
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258 | ModifyGraph mode=3 |
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259 | ModifyGraph marker=19 |
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260 | ModifyGraph rgb=(0,0,0) |
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261 | Modifygraph log=1 |
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262 | Modifygraph grid=1 |
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263 | Modifygraph mirror=2 |
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264 | Label bottom, "Q (1/A)" |
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265 | Label left, "Relative Intensity" |
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266 | legend |
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267 | |
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268 | ControlBar 200 |
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269 | |
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270 | Slider SC_Slider,pos={11,46},size={150,45},proc=GuideSliderProc,live=0 |
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271 | Slider SC_Slider,limits={0,8,1},variable= root:SAS:gNg,vert= 0,thumbColor= (1,16019,65535) |
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272 | Slider SC_Slider_1,pos={234,45},size={150,45},proc=DetDistSliderProc,live=0 |
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273 | Slider SC_Slider_1,tkLblRot= 90,userTicks={root:SAS:tickSDDNG3,root:SAS:lblSDDNG3 } |
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274 | Slider SC_Slider_1,limits={133,1319,1},variable= root:SAS:gDetDist,vert= 0,thumbColor= (1,16019,65535) |
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275 | Slider SC_Slider_2,pos={394,21},size={47,65},proc=OffsetSliderProc,live=0,ticks=4 |
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276 | Slider SC_Slider_2,limits={0,25,1},variable= root:SAS:gOffset,thumbColor= (1,16019,65535) |
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277 | CheckBox checkNG3,pos={20,16},size={36,14},proc=SelectInstrumentCheckProc,title="NG3" |
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278 | CheckBox checkNG3,value=1,mode=1 |
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279 | CheckBox checkNG7,pos={66,16},size={36,14},proc=SelectInstrumentCheckProc,title="NG7" |
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280 | CheckBox checkNG7,value=0,mode=1 |
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281 | CheckBox checkChamber,pos={172,48},size={57,14},proc=TableCheckProc,title="Chamber" |
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282 | CheckBox checkChamber,value=1,mode=1 |
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283 | CheckBox checkHuber,pos={172,27},size={44,14},proc=TableCheckProc,title="Huber" |
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284 | CheckBox checkHuber,value=0,mode=1 |
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285 | PopupMenu popup0,pos={6,94},size={76,20},proc=SourceAperturePopMenuProc |
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286 | PopupMenu popup0,mode=1,popvalue="3.81 cm",value= root:SAS:gSourceApString |
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287 | PopupMenu popup0_1,pos={172,72},size={49,20},proc=SampleAperturePopMenuProc |
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288 | PopupMenu popup0_1,mode=8,popvalue="1/2\"",value= root:SAS:gApPopStr |
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289 | SetVariable setvar0,pos={301,107},size={130,15},title="Det Dist (cm)",proc=SDDSetVarProc |
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290 | SetVariable setvar0,limits={133,1319,1},value=root:SAS:gDetDist |
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291 | SetVariable setvar0_1,pos={321,129},size={110,15},title="Offset (cm)",proc=OffsetSetVarProc |
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292 | SetVariable setvar0_1,limits={0,25,1},value= root:SAS:gOffset |
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293 | SetVariable setvar0_2,pos={6,130},size={90,15},title="Lambda",proc=LambdaSetVarProc |
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294 | SetVariable setvar0_2,limits={5,20,0.1},value= root:SAS:gLambda |
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295 | PopupMenu popup0_2,pos={108,127},size={55,20},proc=DeltaLambdaPopMenuProc |
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296 | PopupMenu popup0_2,mode=1,popvalue="0.15",value= root:SAS:gDeltaLambdaStr |
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297 | Button FreezeButton title="Freeze",size={60,20},pos={307,166} |
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298 | Button FreezeButton proc=FreezeButtonProc |
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299 | Button ClearButton title="Clear",size={60,20},pos={377,166} |
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300 | Button ClearButton proc=ClearButtonProc |
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301 | GroupBox group0,pos={6,1},size={108,33},title="Instrument" |
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302 | SetDataFolder fldrSav0 |
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303 | |
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304 | // set up a fake dependency to trigger recalculation |
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305 | //root:SAS:gCalculate := ReCalculateInten(root:SAS:gTouched) |
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306 | EndMacro |
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307 | |
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308 | // based on the instrument selected... |
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309 | //set the SDD range |
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310 | // set the source aperture popup (based on NGx and number of guides) |
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311 | // set the wavelength spread popup |
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312 | // |
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313 | Function UpdateControls() |
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314 | //poll the controls on the panel, and change needed values |
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315 | Variable isNG3,Ng,mode |
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316 | ControlInfo checkNG3 |
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317 | isNG3=V_value |
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318 | ControlInfo SC_slider |
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319 | Ng=V_value |
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320 | SVAR A1str= root:SAS:gSourceApString// = "1.43 cm;2.54 cm;3.81 cm;" |
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321 | SVAR dlStr = root:SAS:gDeltaLambdaStr |
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322 | if(isNG3) |
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323 | switch(ng) |
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324 | case 0: |
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325 | ControlInfo popup0 |
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326 | mode=V_value |
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327 | A1str="1.43 cm;2.54 cm;3.81 cm;" |
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328 | break |
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329 | case 6: |
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330 | A1str = "! 6 Guides invalid;" |
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331 | mode=1 |
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332 | break |
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333 | case 7: |
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334 | A1Str = "2.50 cm;5.00 cm;" |
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335 | mode = 1 |
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336 | break |
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337 | default: |
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338 | A1str = "5 cm;" |
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339 | mode=1 |
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340 | endswitch |
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341 | //wavelength spread |
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342 | dlStr = "0.11;0.15;0.34;" |
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343 | //detector limits |
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344 | SetVariable setvar0,limits={133,1319,1} |
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345 | NVAR detDist=root:SAS:gDetDist |
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346 | if(detDist < 133 ) |
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347 | detDist = 133 |
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348 | elseif (detDist > 1319 ) |
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349 | detDist = 1319 |
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350 | endif |
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351 | Slider SC_Slider_1,limits={133,1319,1},userTicks={root:SAS:tickSDDNG3,root:SAS:lblSDDNG3 } |
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352 | Slider SC_Slider_1,variable=root:SAS:gDetDist //forces update |
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353 | else //ng7 |
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354 | switch(ng) |
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355 | case 0: |
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356 | ControlInfo popup0 |
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357 | mode=V_value |
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358 | A1str="1.43 cm;2.22 cm;3.81 cm;" |
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359 | break |
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360 | default: |
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361 | A1str = "5.08 cm;" |
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362 | mode=1 |
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363 | endswitch |
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364 | |
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365 | dlStr = "0.09;0.11;0.22;" |
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366 | Slider SC_Slider_1,limits={100,1531,1},userTicks={root:SAS:tickSDDNG7,root:SAS:lblSDDNG7 } |
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367 | SetVariable setvar0,limits={100,1531,1} |
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368 | Slider SC_Slider_1,variable=root:SAS:gDetDist //forces update |
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369 | endif |
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370 | ControlUpdate popup0 |
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371 | PopupMenu popup0,mode=mode //source Ap |
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372 | ControlInfo popup0 |
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373 | SourceAperturePopMenuProc("",0,S_Value) //send popNum==0 so recalculation won't be done |
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374 | |
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375 | ControlUpdate popup0_2 // delta lambda pop |
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376 | ControlInfo popup0_2 |
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377 | DeltaLambdaPopMenuProc("",0,S_Value) //sets the global and the wave |
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378 | End |
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379 | |
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380 | //changing the number of guides changes the SSD |
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381 | // the source aperture popup may need to be updated |
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382 | // |
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383 | Function GuideSliderProc(ctrlName,sliderValue,event) |
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384 | String ctrlName |
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385 | Variable sliderValue |
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386 | Variable event // bit field: bit 0: value set, 1: mouse down, 2: mouse up, 3: mouse moved |
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387 | |
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388 | if(event %& 0x1) // bit 0, value set |
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389 | sourceToSampleDist() //updates the SSD global and wave |
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390 | //change the sourceAp popup, SDD range, etc |
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391 | UpdateControls() |
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392 | ReCalculateInten(1) |
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393 | endif |
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394 | return 0 |
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395 | End |
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396 | |
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397 | // changing the detector position changes the SDD |
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398 | // |
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399 | Function DetDistSliderProc(ctrlName,sliderValue,event) |
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400 | String ctrlName |
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401 | Variable sliderValue |
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402 | Variable event // bit field: bit 0: value set, 1: mouse down, 2: mouse up, 3: mouse moved |
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403 | |
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404 | if(event %& 0x1) // bit 0, value set |
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405 | sampleToDetectorDist() //changes the SDD and wave (DetDist is the global) |
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406 | ReCalculateInten(1) |
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407 | endif |
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408 | |
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409 | return 0 |
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410 | End |
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411 | |
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412 | // change the offset |
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413 | // - changes the beamcenter (x,y) position too |
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414 | Function OffsetSliderProc(ctrlName,sliderValue,event) |
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415 | String ctrlName |
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416 | Variable sliderValue |
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417 | Variable event // bit field: bit 0: value set, 1: mouse down, 2: mouse up, 3: mouse moved |
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418 | |
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419 | if(event %& 0x1) // bit 0, value set |
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420 | detectorOffset() |
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421 | ReCalculateInten(1) |
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422 | endif |
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423 | |
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424 | return 0 |
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425 | End |
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426 | |
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427 | // changing the instrument - |
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428 | // re-initialize the global values |
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429 | // update the controls to appropriate limits/choices |
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430 | // |
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431 | Function SelectInstrumentCheckProc(ctrlName,checked) : CheckBoxControl |
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432 | String ctrlName |
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433 | Variable checked |
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434 | |
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435 | if(cmpstr(ctrlName,"checkNG3")==0) |
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436 | checkBox checkNG3, value=1 |
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437 | checkBox checkNG7, value=0 |
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438 | initNG3() |
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439 | else |
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440 | checkBox checkNG3, value=0 |
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441 | checkBox checkNG7, value=1 |
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442 | initNG7() |
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443 | endif |
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444 | UpdateControls() |
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445 | ReCalculateInten(1) |
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446 | End |
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447 | |
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448 | //changing the table position |
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449 | // changes the SSD and SDD |
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450 | Function TableCheckProc(ctrlName,checked) : CheckBoxControl |
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451 | String ctrlName |
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452 | Variable checked |
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453 | |
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454 | NVAR table=root:SAS:gTable |
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455 | if(cmpstr(ctrlName,"checkHuber")==0) |
---|
456 | checkBox checkHuber, value=1 |
---|
457 | checkBox checkChamber, value=0 |
---|
458 | table=1 //in Huber position |
---|
459 | else |
---|
460 | checkBox checkHuber, value=0 |
---|
461 | checkBox checkChamber, value=1 |
---|
462 | table = 2 //in Sample chamber |
---|
463 | endif |
---|
464 | sampleToDetectorDist() |
---|
465 | sourceToSampleDist() //update |
---|
466 | ReCalculateInten(1) |
---|
467 | End |
---|
468 | |
---|
469 | // change the source aperture |
---|
470 | // |
---|
471 | Function SourceAperturePopMenuProc(ctrlName,popNum,popStr) : PopupMenuControl |
---|
472 | String ctrlName |
---|
473 | Variable popNum |
---|
474 | String popStr |
---|
475 | |
---|
476 | Variable a1 = sourceApertureDiam() //sets the new value in the wave |
---|
477 | |
---|
478 | ReCalculateInten(popnum) //skip the recalculation if I pass in a zero |
---|
479 | End |
---|
480 | |
---|
481 | // set sample aperture |
---|
482 | // |
---|
483 | Function SampleAperturePopMenuProc(ctrlName,popNum,popStr) : PopupMenuControl |
---|
484 | String ctrlName |
---|
485 | Variable popNum |
---|
486 | String popStr |
---|
487 | |
---|
488 | sampleApertureDiam() |
---|
489 | ReCalculateInten(1) |
---|
490 | End |
---|
491 | |
---|
492 | // set sample to detector distance |
---|
493 | // |
---|
494 | Function SDDSetVarProc(ctrlName,varNum,varStr,varName) : SetVariableControl |
---|
495 | String ctrlName |
---|
496 | Variable varNum |
---|
497 | String varStr |
---|
498 | String varName |
---|
499 | |
---|
500 | sampleToDetectorDist() |
---|
501 | |
---|
502 | ReCalculateInten(1) |
---|
503 | End |
---|
504 | |
---|
505 | // set offset |
---|
506 | // -- also changes the beamcenter (x,y) |
---|
507 | // |
---|
508 | Function OffsetSetVarProc(ctrlName,varNum,varStr,varName) : SetVariableControl |
---|
509 | String ctrlName |
---|
510 | Variable varNum |
---|
511 | String varStr |
---|
512 | String varName |
---|
513 | |
---|
514 | detectorOffset() //sets the offset in the wave and also the new (x,y) beamcenter |
---|
515 | |
---|
516 | ReCalculateInten(1) |
---|
517 | return(0) |
---|
518 | End |
---|
519 | |
---|
520 | // change the wavelength |
---|
521 | Function LambdaSetVarProc(ctrlName,varNum,varStr,varName) : SetVariableControl |
---|
522 | String ctrlName |
---|
523 | Variable varNum |
---|
524 | String varStr |
---|
525 | String varName |
---|
526 | |
---|
527 | WAVE rw=root:SAS:realsRead |
---|
528 | rw[26] = str2num(varStr) |
---|
529 | ReCalculateInten(1) |
---|
530 | return(0) |
---|
531 | End |
---|
532 | |
---|
533 | // change the wavelength spread |
---|
534 | Function DeltaLambdaPopMenuProc(ctrlName,popNum,popStr) : PopupMenuControl |
---|
535 | String ctrlName |
---|
536 | Variable popNum |
---|
537 | String popStr |
---|
538 | |
---|
539 | NVAR dl=root:SAS:gDeltaLambda |
---|
540 | dl=str2num(popStr) |
---|
541 | WAVE rw=root:SAS:realsRead |
---|
542 | rw[27] = dl |
---|
543 | ReCalculateInten(popnum) //skip the calculation if I pass in zero |
---|
544 | return(0) |
---|
545 | End |
---|
546 | |
---|
547 | |
---|
548 | Proc DoTest() |
---|
549 | |
---|
550 | S_CircularAverageTo1D("SAS") |
---|
551 | |
---|
552 | //multiply by sphere FF (S_SphereForm(scale,radius,delrho,bkg,x)) |
---|
553 | // or Debye Function S_Debye(scale,rg,bkg,x) |
---|
554 | |
---|
555 | //root:SAS:aveint = S_SphereForm(1,80,1e-6,0,root:SAS:qval) |
---|
556 | root:SAS:aveint = S_Debye(1000,100,0,qval) |
---|
557 | |
---|
558 | // multiply by beamstop shadowing |
---|
559 | root:SAS:aveint *= root:SAS:fSubS |
---|
560 | |
---|
561 | End |
---|
562 | |
---|
563 | // passing in zero from a control skips the calculation |
---|
564 | Function ReCalculateInten(doIt) |
---|
565 | Variable doIt |
---|
566 | |
---|
567 | if(doIt==0) |
---|
568 | return(0) |
---|
569 | endif |
---|
570 | |
---|
571 | // update the wave with the beamstop diameter here, since I don't know what |
---|
572 | // combinations of parameters will change the BS - but anytime the curve is |
---|
573 | // recalculated, or the text displayed, the right BS must be present |
---|
574 | beamstopDiam() |
---|
575 | |
---|
576 | S_CircularAverageTo1D("SAS") |
---|
577 | WAVE aveint=root:SAS:aveint |
---|
578 | WAVE qval=root:SAS:qval |
---|
579 | WAVE fSubS=root:SAS:fSubS |
---|
580 | |
---|
581 | //multiply by sphere FF (S_SphereForm(scale,radius,delrho,bkg,x)) |
---|
582 | // or Debye Function S_Debye(scale,rg,bkg,x) |
---|
583 | |
---|
584 | //aveint = S_SphereForm(1,80,1e-6,0,qval) |
---|
585 | aveint = S_Debye(1000,100,0.0,qval) |
---|
586 | |
---|
587 | // multiply by beamstop shadowing |
---|
588 | aveint *= fSubS |
---|
589 | |
---|
590 | //display the configuration text in a separate notebook |
---|
591 | DisplayConfigurationText() |
---|
592 | |
---|
593 | return(0) |
---|
594 | End |
---|
595 | |
---|
596 | //freezes the current configuration |
---|
597 | // -1- duplicates the trace on the graph |
---|
598 | // -2- copies the configuration text to a second notebook window for printing |
---|
599 | Function FreezeButtonProc(ctrlName) : ButtonControl |
---|
600 | String ctrlName |
---|
601 | |
---|
602 | String str="" |
---|
603 | NVAR ct=root:SAS:gFreezeCount |
---|
604 | SetDataFolder root:SAS |
---|
605 | |
---|
606 | Duplicate/O aveint,$("aveint_"+num2str(ct)) |
---|
607 | Duplicate/O qval,$("qval_"+num2str(ct)) |
---|
608 | Appendtograph $("aveint_"+num2str(ct)) vs $("qval_"+num2str(ct)) |
---|
609 | ModifyGraph mode=3 |
---|
610 | ModifyGraph marker=19 |
---|
611 | switch(mod(ct,10)) // 10 different colors - black is the unfrozen color |
---|
612 | case 0: |
---|
613 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(65535,16385,16385) |
---|
614 | break |
---|
615 | case 1: |
---|
616 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(2,39321,1) |
---|
617 | break |
---|
618 | case 2: |
---|
619 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(0,0,65535) |
---|
620 | break |
---|
621 | case 3: |
---|
622 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(39321,1,31457) |
---|
623 | break |
---|
624 | case 4: |
---|
625 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(48059,48059,48059) |
---|
626 | break |
---|
627 | case 5: |
---|
628 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(65535,32768,32768) |
---|
629 | break |
---|
630 | case 6: |
---|
631 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(0,65535,0) |
---|
632 | break |
---|
633 | case 7: |
---|
634 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(16385,65535,65535) |
---|
635 | break |
---|
636 | case 8: |
---|
637 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(65535,32768,58981) |
---|
638 | break |
---|
639 | case 9: |
---|
640 | ModifyGraph rgb($("aveint_"+num2str(ct)))=(36873,14755,58982) |
---|
641 | break |
---|
642 | endswitch |
---|
643 | |
---|
644 | ct +=1 |
---|
645 | SetDataFolder root: |
---|
646 | |
---|
647 | // create or append the configuration to a new notebook |
---|
648 | if(WinType("Saved_Configurations")==0) |
---|
649 | NewNotebook/F=1/N=Saved_Configurations /W=(480,400,880,725) |
---|
650 | endif |
---|
651 | //append the text |
---|
652 | sprintf str,"\rConfiguration #%d\r",ct-1 |
---|
653 | Notebook Saved_Configurations showRuler=0,defaultTab=20,selection={endOfFile, endOfFile} |
---|
654 | Notebook Saved_Configurations font="Monaco",fSize=10,fstyle=1,text=str //bold |
---|
655 | Notebook Saved_Configurations font="Monaco",fSize=10,fstyle=0,text=SetConfigurationText() |
---|
656 | return(0) |
---|
657 | End |
---|
658 | |
---|
659 | //clears the frozen traces on the graph, asks if you want to clear the saved text |
---|
660 | // |
---|
661 | Function ClearButtonProc(ctrlName) : ButtonControl |
---|
662 | String ctrlName |
---|
663 | |
---|
664 | NVAR ct=root:SAS:gFreezeCount |
---|
665 | Variable ii |
---|
666 | Setdatafolder root:SAS |
---|
667 | for(ii=ct-1;ii>=0;ii-=1) |
---|
668 | //remove all traces, replace aveint |
---|
669 | // kill all waves _ct |
---|
670 | RemoveFromGraph $("aveint_"+num2str(ii)) |
---|
671 | Killwaves/Z $("aveint_"+num2str(ii)),$("qval_"+num2str(ii)) |
---|
672 | endfor |
---|
673 | ct=0 |
---|
674 | setdatafolder root: |
---|
675 | |
---|
676 | DoAlert 1,"Do you also want to clear the \"Saved Configurations\" text?" |
---|
677 | if(V_flag == 1) // yes |
---|
678 | DoWindow/K Saved_Configurations |
---|
679 | endif |
---|
680 | |
---|
681 | return(0) |
---|
682 | End |
---|
683 | |
---|
684 | |
---|
685 | /////////////////////////////////////////////////////////// |
---|
686 | Function S_CircularAverageTo1D(type) |
---|
687 | String type |
---|
688 | |
---|
689 | Variable isCircular = 1 |
---|
690 | |
---|
691 | //type is the data type to do the averaging on, and will be set as the current folder |
---|
692 | //get the current displayed data (so the correct folder is used) |
---|
693 | String destPath = "root:"+type |
---|
694 | |
---|
695 | // |
---|
696 | Variable xcenter,ycenter,x0,y0,sx,sx3,sy,sy3,dtsize,dtdist,dr,ddr |
---|
697 | Variable lambda,trans |
---|
698 | WAVE reals = $(destPath + ":RealsRead") |
---|
699 | // WAVE/T textread = $(destPath + ":TextRead") |
---|
700 | // String fileStr = textread[3] |
---|
701 | |
---|
702 | // center of detector, for non-linear corrections |
---|
703 | // NVAR pixelsX = root:myGlobals:gNPixelsX |
---|
704 | // NVAR pixelsY = root:myGlobals:gNPixelsY |
---|
705 | Variable pixelsX=128,pixelsY=128 |
---|
706 | |
---|
707 | xcenter = pixelsX/2 + 0.5 // == 64.5 for 128x128 Ordela |
---|
708 | ycenter = pixelsY/2 + 0.5 // == 64.5 for 128x128 Ordela |
---|
709 | |
---|
710 | // beam center, in pixels |
---|
711 | x0 = reals[16] |
---|
712 | y0 = reals[17] |
---|
713 | //detector calibration constants |
---|
714 | sx = reals[10] //mm/pixel (x) |
---|
715 | sx3 = reals[11] //nonlinear coeff |
---|
716 | sy = reals[13] //mm/pixel (y) |
---|
717 | sy3 = reals[14] //nonlinear coeff |
---|
718 | |
---|
719 | dtsize = 10*reals[20] //det size in mm |
---|
720 | dtdist = 1000*reals[18] // det distance in mm |
---|
721 | |
---|
722 | NVAR binWidth=root:myGlobals:gBinWidth |
---|
723 | // Variable binWidth = 1 |
---|
724 | |
---|
725 | dr = binWidth // ***********annulus width set by user, default is one*********** |
---|
726 | ddr = dr*sx //step size, in mm (this value should be passed to the resolution calculation, not dr 18NOV03) |
---|
727 | |
---|
728 | Variable rcentr,large_num,small_num,dtdis2,nq,xoffst,dxbm,dybm,ii |
---|
729 | Variable phi_rad,dphi_rad,phi_x,phi_y |
---|
730 | Variable forward,mirror |
---|
731 | |
---|
732 | String side = "both" |
---|
733 | // side = StringByKey("SIDE",keyListStr,"=",";") |
---|
734 | // Print "side = ",side |
---|
735 | |
---|
736 | /// data wave is data in the current folder which was set at the top of the function |
---|
737 | WAVE data=$(destPath + ":data") |
---|
738 | |
---|
739 | // fake mask that uses all of the detector |
---|
740 | Make/O/N=(pixelsX,pixelsY) $(destPath + ":mask") |
---|
741 | Wave mask = $(destPath + ":mask") |
---|
742 | mask = 0 |
---|
743 | //two pixels all around |
---|
744 | mask[0,1][] = 1 |
---|
745 | mask[126,127][] = 1 |
---|
746 | mask[][0,1] = 1 |
---|
747 | mask[][126,127] = 1 |
---|
748 | // |
---|
749 | //pixels within rcentr of beam center are broken into 9 parts (units of mm) |
---|
750 | rcentr = 100 //original |
---|
751 | // rcentr = 0 |
---|
752 | // values for error if unable to estimate value |
---|
753 | //large_num = 1e10 |
---|
754 | large_num = 1 //1e10 value (typically sig of last data point) plots poorly, arb set to 1 |
---|
755 | small_num = 1e-10 |
---|
756 | |
---|
757 | // output wave are expected to exist (?) initialized to zero, what length? |
---|
758 | // 200 points on VAX --- use 300 here, or more if SAXS data is used with 1024x1024 detector (1000 pts seems good) |
---|
759 | Variable defWavePts=500 |
---|
760 | Make/O/N=(defWavePts) $(destPath + ":qval"),$(destPath + ":aveint") |
---|
761 | Make/O/N=(defWavePts) $(destPath + ":ncells"),$(destPath + ":dsq"),$(destPath + ":sigave") |
---|
762 | Make/O/N=(defWavePts) $(destPath + ":SigmaQ"),$(destPath + ":fSubS"),$(destPath + ":QBar") |
---|
763 | |
---|
764 | WAVE qval = $(destPath + ":qval") |
---|
765 | WAVE aveint = $(destPath + ":aveint") |
---|
766 | WAVE ncells = $(destPath + ":ncells") |
---|
767 | WAVE dsq = $(destPath + ":dsq") |
---|
768 | WAVE sigave = $(destPath + ":sigave") |
---|
769 | WAVE qbar = $(destPath + ":QBar") |
---|
770 | WAVE sigmaq = $(destPath + ":SigmaQ") |
---|
771 | WAVE fsubs = $(destPath + ":fSubS") |
---|
772 | |
---|
773 | qval = 0 |
---|
774 | aveint = 0 |
---|
775 | ncells = 0 |
---|
776 | dsq = 0 |
---|
777 | sigave = 0 |
---|
778 | qbar = 0 |
---|
779 | sigmaq = 0 |
---|
780 | fsubs = 0 |
---|
781 | |
---|
782 | dtdis2 = dtdist^2 |
---|
783 | nq = 1 |
---|
784 | xoffst=0 |
---|
785 | //distance of beam center from detector center |
---|
786 | dxbm = S_FX(x0,sx3,xcenter,sx) |
---|
787 | dybm = S_FY(y0,sy3,ycenter,sy) |
---|
788 | |
---|
789 | //BEGIN AVERAGE ********** |
---|
790 | Variable xi,dxi,dx,jj,data_pixel,yj,dyj,dy,mask_val=0.1 |
---|
791 | Variable dr2,nd,fd,nd2,ll,kk,dxx,dyy,ir,dphi_p |
---|
792 | |
---|
793 | // IGOR arrays are indexed from [0][0], FORTAN from (1,1) (and the detector too) |
---|
794 | // loop index corresponds to FORTRAN (old code) |
---|
795 | // and the IGOR array indices must be adjusted (-1) to the correct address |
---|
796 | ii=1 |
---|
797 | do |
---|
798 | xi = ii |
---|
799 | dxi = S_FX(xi,sx3,xcenter,sx) |
---|
800 | dx = dxi-dxbm //dx and dy are in mm |
---|
801 | |
---|
802 | jj = 1 |
---|
803 | do |
---|
804 | data_pixel = data[ii-1][jj-1] //assign to local variable |
---|
805 | yj = jj |
---|
806 | dyj = S_FY(yj,sy3,ycenter,sy) |
---|
807 | dy = dyj - dybm |
---|
808 | if(!(mask[ii-1][jj-1])) //masked pixels = 1, skip if masked (this way works...) |
---|
809 | dr2 = (dx^2 + dy^2)^(0.5) //distance from beam center NOTE dr2 used here - dr used above |
---|
810 | if(dr2>rcentr) //keep pixel whole |
---|
811 | nd = 1 |
---|
812 | fd = 1 |
---|
813 | else //break pixel into 9 equal parts |
---|
814 | nd = 3 |
---|
815 | fd = 2 |
---|
816 | endif |
---|
817 | nd2 = nd^2 |
---|
818 | ll = 1 //"el-el" loop index |
---|
819 | do |
---|
820 | dxx = dx + (ll - fd)*sx/3 |
---|
821 | kk = 1 |
---|
822 | do |
---|
823 | dyy = dy + (kk - fd)*sy/3 |
---|
824 | if(isCircular) |
---|
825 | //circular average, use all pixels |
---|
826 | //(increment) |
---|
827 | nq = S_IncrementPixel(data_pixel,ddr,dxx,dyy,aveint,dsq,ncells,nq,nd2) |
---|
828 | else |
---|
829 | //a sector average - determine azimuthal angle |
---|
830 | dphi_p = S_dphi_pixel(dxx,dyy,phi_x,phi_y) |
---|
831 | if(dphi_p < dphi_rad) |
---|
832 | forward = 1 //within forward sector |
---|
833 | else |
---|
834 | forward = 0 |
---|
835 | Endif |
---|
836 | if((Pi - dphi_p) < dphi_rad) |
---|
837 | mirror = 1 //within mirror sector |
---|
838 | else |
---|
839 | mirror = 0 |
---|
840 | Endif |
---|
841 | //check if pixel lies within allowed sector(s) |
---|
842 | if(cmpstr(side,"both")==0) //both sectors |
---|
843 | if ( mirror || forward) |
---|
844 | //increment |
---|
845 | nq = S_IncrementPixel(data_pixel,ddr,dxx,dyy,aveint,dsq,ncells,nq,nd2) |
---|
846 | Endif |
---|
847 | else |
---|
848 | if(cmpstr(side,"right")==0) //forward sector only |
---|
849 | if(forward) |
---|
850 | //increment |
---|
851 | nq = S_IncrementPixel(data_pixel,ddr,dxx,dyy,aveint,dsq,ncells,nq,nd2) |
---|
852 | Endif |
---|
853 | else //mirror sector only |
---|
854 | if(mirror) |
---|
855 | //increment |
---|
856 | nq = S_IncrementPixel(data_pixel,ddr,dxx,dyy,aveint,dsq,ncells,nq,nd2) |
---|
857 | Endif |
---|
858 | Endif |
---|
859 | Endif //allowable sectors |
---|
860 | Endif //circular or sector check |
---|
861 | kk+=1 |
---|
862 | while(kk<=nd) |
---|
863 | ll += 1 |
---|
864 | while(ll<=nd) |
---|
865 | Endif //masked pixel check |
---|
866 | jj += 1 |
---|
867 | while (jj<=pixelsY) |
---|
868 | ii += 1 |
---|
869 | while(ii<=pixelsX) //end of the averaging |
---|
870 | |
---|
871 | //compute q-values and errors |
---|
872 | Variable ntotal,rr,theta,avesq,aveisq,var |
---|
873 | |
---|
874 | lambda = reals[26] |
---|
875 | ntotal = 0 |
---|
876 | kk = 1 |
---|
877 | do |
---|
878 | rr = (2*kk-1)*ddr/2 |
---|
879 | theta = 0.5*atan(rr/dtdist) |
---|
880 | qval[kk-1] = (4*Pi/lambda)*sin(theta) |
---|
881 | if(ncells[kk-1] == 0) |
---|
882 | //no pixels in annuli, data unknown |
---|
883 | aveint[kk-1] = 0 |
---|
884 | sigave[kk-1] = large_num |
---|
885 | else |
---|
886 | if(ncells[kk-1] <= 1) |
---|
887 | //need more than one pixel to determine error |
---|
888 | aveint[kk-1] = aveint[kk-1]/ncells[kk-1] |
---|
889 | sigave[kk-1] = large_num |
---|
890 | else |
---|
891 | //assume that the intensity in each pixel in annuli is normally |
---|
892 | // distributed about mean... |
---|
893 | aveint[kk-1] = aveint[kk-1]/ncells[kk-1] |
---|
894 | avesq = aveint[kk-1]^2 |
---|
895 | aveisq = dsq[kk-1]/ncells[kk-1] |
---|
896 | var = aveisq-avesq |
---|
897 | if(var<=0) |
---|
898 | sigave[kk-1] = small_num |
---|
899 | else |
---|
900 | sigave[kk-1] = sqrt(var/(ncells[kk-1] - 1)) |
---|
901 | endif |
---|
902 | endif |
---|
903 | endif |
---|
904 | ntotal += ncells[kk-1] |
---|
905 | kk+=1 |
---|
906 | while(kk<=nq) |
---|
907 | |
---|
908 | //Print "NQ = ",nq |
---|
909 | // data waves were defined as 300 points (=defWavePts), but now have less than that (nq) points |
---|
910 | // use DeletePoints to remove junk from end of waves |
---|
911 | //WaveStats would be a more foolproof implementation, to get the # points in the wave |
---|
912 | Variable startElement,numElements |
---|
913 | startElement = nq |
---|
914 | numElements = defWavePts - startElement |
---|
915 | DeletePoints startElement,numElements, qval,aveint,ncells,dsq,sigave |
---|
916 | |
---|
917 | //////////////end of VAX sector_ave() |
---|
918 | |
---|
919 | |
---|
920 | |
---|
921 | // *************************************************************** |
---|
922 | // |
---|
923 | // Do the extra 3 columns of resolution calculations starting here. |
---|
924 | // |
---|
925 | // *************************************************************** |
---|
926 | |
---|
927 | Variable L2 = reals[18] |
---|
928 | Variable BS = reals[21] |
---|
929 | Variable S1 = reals[23] |
---|
930 | Variable S2 = reals[24] |
---|
931 | Variable L1 = reals[25] |
---|
932 | lambda = reals[26] |
---|
933 | Variable lambdaWidth = reals[27] |
---|
934 | |
---|
935 | Variable DDet, apOff=0.0 |
---|
936 | // hard wire value for Ordela detectors |
---|
937 | DDet = 0.5 // resoltion in cm |
---|
938 | // String detStr=textRead[9] |
---|
939 | // DDet = DetectorPixelResolution(fileStr,detStr) //needs detector type and beamline |
---|
940 | |
---|
941 | //Go from 0 to nq doing the calc for all three values at |
---|
942 | //every Q value |
---|
943 | |
---|
944 | ii=0 |
---|
945 | // String res_string="root:myGlobals:Res_vals" |
---|
946 | // Make/O/D/N=3 $res_string |
---|
947 | // Wave res_wave=$res_string |
---|
948 | Variable ret1,ret2,ret3 |
---|
949 | do |
---|
950 | S_getResolution(qval[ii],lambda,lambdaWidth,DDet,apOff,S1,S2,L1,L2,BS,ddr,ret1,ret2,ret3) |
---|
951 | sigmaq[ii] = ret1 //res_wave[0] |
---|
952 | qbar[ii] = ret2 //res_wave[1] |
---|
953 | fsubs[ii] = ret3 //res_wave[2] |
---|
954 | ii+=1 |
---|
955 | while(ii<nq) |
---|
956 | DeletePoints startElement,numElements, sigmaq, qbar, fsubs |
---|
957 | |
---|
958 | fsubs += 1e-8 //keep the values from being too small |
---|
959 | |
---|
960 | // End of resolution calculations |
---|
961 | // *************************************************************** |
---|
962 | |
---|
963 | //get rid of the default mask, if one was created (it is in the current folder) |
---|
964 | //don't just kill "mask" since it might be pointing to the one in the MSK folder |
---|
965 | Killwaves/Z $(destPath+":mask") |
---|
966 | |
---|
967 | //return to root folder (redundant) |
---|
968 | SetDataFolder root: |
---|
969 | |
---|
970 | Return 0 |
---|
971 | End |
---|
972 | |
---|
973 | //returns nq, new number of q-values |
---|
974 | //arrays aveint,dsq,ncells are also changed by this function |
---|
975 | // |
---|
976 | Function S_IncrementPixel(dataPixel,ddr,dxx,dyy,aveint,dsq,ncells,nq,nd2) |
---|
977 | Variable dataPixel,ddr,dxx,dyy |
---|
978 | Wave aveint,dsq,ncells |
---|
979 | Variable nq,nd2 |
---|
980 | |
---|
981 | Variable ir |
---|
982 | |
---|
983 | ir = trunc(sqrt(dxx*dxx+dyy*dyy)/ddr)+1 |
---|
984 | if (ir>nq) |
---|
985 | nq = ir //resets maximum number of q-values |
---|
986 | endif |
---|
987 | aveint[ir-1] += dataPixel/nd2 //ir-1 must be used, since ir is physical |
---|
988 | dsq[ir-1] += dataPixel*dataPixel/nd2 |
---|
989 | ncells[ir-1] += 1/nd2 |
---|
990 | |
---|
991 | Return nq |
---|
992 | End |
---|
993 | |
---|
994 | //function determines azimuthal angle dphi that a vector connecting |
---|
995 | //center of detector to pixel makes with respect to vector |
---|
996 | //at chosen azimuthal angle phi -> [cos(phi),sin(phi)] = [phi_x,phi_y] |
---|
997 | //dphi is always positive, varying from 0 to Pi |
---|
998 | // |
---|
999 | Function S_dphi_pixel(dxx,dyy,phi_x,phi_y) |
---|
1000 | Variable dxx,dyy,phi_x,phi_y |
---|
1001 | |
---|
1002 | Variable val,rr,dot_prod |
---|
1003 | |
---|
1004 | rr = sqrt(dxx^2 + dyy^2) |
---|
1005 | dot_prod = (dxx*phi_x + dyy*phi_y)/rr |
---|
1006 | //? correct for roundoff error? - is this necessary in IGOR, w/ double precision? |
---|
1007 | if(dot_prod > 1) |
---|
1008 | dot_prod =1 |
---|
1009 | Endif |
---|
1010 | if(dot_prod < -1) |
---|
1011 | dot_prod = -1 |
---|
1012 | Endif |
---|
1013 | |
---|
1014 | val = acos(dot_prod) |
---|
1015 | |
---|
1016 | return val |
---|
1017 | |
---|
1018 | End |
---|
1019 | |
---|
1020 | //calculates the x distance from the center of the detector, w/nonlinear corrections |
---|
1021 | // |
---|
1022 | Function S_FX(xx,sx3,xcenter,sx) |
---|
1023 | Variable xx,sx3,xcenter,sx |
---|
1024 | |
---|
1025 | Variable retval |
---|
1026 | |
---|
1027 | retval = sx3*tan((xx-xcenter)*sx/sx3) |
---|
1028 | Return retval |
---|
1029 | End |
---|
1030 | |
---|
1031 | //calculates the y distance from the center of the detector, w/nonlinear corrections |
---|
1032 | // |
---|
1033 | Function S_FY(yy,sy3,ycenter,sy) |
---|
1034 | Variable yy,sy3,ycenter,sy |
---|
1035 | |
---|
1036 | Variable retval |
---|
1037 | |
---|
1038 | retval = sy3*tan((yy-ycenter)*sy/sy3) |
---|
1039 | Return retval |
---|
1040 | End |
---|
1041 | |
---|
1042 | //********************** |
---|
1043 | // Resolution calculation - used by the averaging routines |
---|
1044 | // to calculate the resolution function at each q-value |
---|
1045 | // - the return value is not used |
---|
1046 | // |
---|
1047 | // equivalent to John's routine on the VAX Q_SIGMA_AVE.FOR |
---|
1048 | // Incorporates eqn. 3-15 from J. Appl. Cryst. (1995) v. 28 p105-114 |
---|
1049 | // |
---|
1050 | Function/S S_getResolution(inQ,lambda,lambdaWidth,DDet,apOff,S1,S2,L1,L2,BS,del_r,SigmaQ,QBar,fSubS) |
---|
1051 | Variable inQ, lambda, lambdaWidth, DDet, apOff, S1, S2, L1, L2, BS, del_r |
---|
1052 | Variable &fSubS, &QBar, &SigmaQ //these are the output quantities at the input Q value |
---|
1053 | |
---|
1054 | //lots of calculation variables |
---|
1055 | Variable a2, q_small, lp, v_lambda, v_b, v_d, vz, yg, v_g |
---|
1056 | Variable r0, delta, inc_gamma, fr, fv, rmd, v_r1, rm, v_r |
---|
1057 | |
---|
1058 | //Constants |
---|
1059 | //Variable del_r = .1 |
---|
1060 | Variable vz_1 = 3.956e5 //velocity [cm/s] of 1 A neutron |
---|
1061 | Variable g = 981.0 //gravity acceleration [cm/s^2] |
---|
1062 | |
---|
1063 | String results |
---|
1064 | results ="Failure" |
---|
1065 | |
---|
1066 | //rename for working variables, these must be gotten from global |
---|
1067 | //variables |
---|
1068 | |
---|
1069 | // Variable wLam, wLW, wL1, wL2, wS1, wS2 |
---|
1070 | // Variable wBS, wDDet, wApOff |
---|
1071 | // wLam = lambda |
---|
1072 | // wLW = lambdaWidth |
---|
1073 | // wDDet = DDet |
---|
1074 | // wApOff = apOff |
---|
1075 | S1 *= 0.5*0.1 //convert to radius and [cm] |
---|
1076 | S2 *= 0.5*0.1 |
---|
1077 | |
---|
1078 | L1 *= 100.0 // [cm] |
---|
1079 | L1 -= apOff //correct the distance |
---|
1080 | |
---|
1081 | L2 *= 100.0 |
---|
1082 | L2 += apOff |
---|
1083 | |
---|
1084 | BS *= 0.5*0.1 //convert to radius and [cm] |
---|
1085 | del_r *= 0.1 //width of annulus, convert mm to [cm] |
---|
1086 | |
---|
1087 | //Start resolution calculation |
---|
1088 | a2 = S1*L2/L1 + S2*(L1+L2)/L1 |
---|
1089 | q_small = 2.0*Pi*(BS-a2)*(1.0-lambdaWidth)/(lambda*L2) |
---|
1090 | lp = 1.0/( 1.0/L1 + 1.0/L2) |
---|
1091 | |
---|
1092 | v_lambda = lambdaWidth^2/6.0 |
---|
1093 | v_b = 0.25*(S1*L2/L1)^2 +0.25*(S2*L2/lp)^2 |
---|
1094 | v_d = (DDet/2.3548)^2 + del_r^2/12.0 |
---|
1095 | vz = vz_1 / lambda |
---|
1096 | yg = 0.5*g*L2*(L1+L2)/vz^2 |
---|
1097 | v_g = 2.0*yg^2*v_lambda |
---|
1098 | |
---|
1099 | r0 = L2*tan(2.0*asin(lambda*inQ/(4.0*Pi) )) |
---|
1100 | delta = 0.5*(BS - r0)^2/v_d |
---|
1101 | |
---|
1102 | if (r0 < BS) |
---|
1103 | inc_gamma=exp(gammln(1.5))*(1-gammp(1.5,delta)) |
---|
1104 | else |
---|
1105 | inc_gamma=exp(gammln(1.5))*(1+gammp(1.5,delta)) |
---|
1106 | endif |
---|
1107 | |
---|
1108 | fSubS = 0.5*(1.0+erf( (r0-BS)/sqrt(2.0*v_d) ) ) |
---|
1109 | if (fSubS <= 0.0) |
---|
1110 | fSubS = 1.e-10 |
---|
1111 | endif |
---|
1112 | fr = 1.0 + sqrt(v_d)*exp(-1.0*delta) /(r0*fSubS*sqrt(2.0*Pi)) |
---|
1113 | fv = inc_gamma/(fSubS*sqrt(Pi)) - r0^2*(fr-1.0)^2/v_d |
---|
1114 | |
---|
1115 | rmd = fr*r0 |
---|
1116 | v_r1 = v_b + fv*v_d +v_g |
---|
1117 | |
---|
1118 | rm = rmd + 0.5*v_r1/rmd |
---|
1119 | v_r = v_r1 - 0.5*(v_r1/rmd)^2 |
---|
1120 | if (v_r < 0.0) |
---|
1121 | v_r = 0.0 |
---|
1122 | endif |
---|
1123 | QBar = (4.0*Pi/lambda)*sin(0.5*atan(rm/L2)) |
---|
1124 | SigmaQ = QBar*sqrt(v_r/rmd^2 +v_lambda) |
---|
1125 | |
---|
1126 | results = "success" |
---|
1127 | Return results |
---|
1128 | End |
---|
1129 | |
---|
1130 | Function S_Debye(scale,rg,bkg,x) |
---|
1131 | Variable scale,rg,bkg |
---|
1132 | Variable x |
---|
1133 | |
---|
1134 | // variables are: |
---|
1135 | //[0] scale factor |
---|
1136 | //[1] radius of gyration [] |
---|
1137 | //[2] background [cm-1] |
---|
1138 | |
---|
1139 | // calculates (scale*debye)+bkg |
---|
1140 | Variable Pq,qr2 |
---|
1141 | |
---|
1142 | qr2=(x*rg)^2 |
---|
1143 | Pq = 2*(exp(-(qr2))-1+qr2)/qr2^2 |
---|
1144 | |
---|
1145 | //scale |
---|
1146 | Pq *= scale |
---|
1147 | // then add in the background |
---|
1148 | return (Pq+bkg) |
---|
1149 | End |
---|
1150 | |
---|
1151 | |
---|
1152 | Function S_SphereForm(scale,radius,delrho,bkg,x) |
---|
1153 | Variable scale,radius,delrho,bkg |
---|
1154 | Variable x |
---|
1155 | |
---|
1156 | // variables are: |
---|
1157 | //[0] scale |
---|
1158 | //[1] radius () |
---|
1159 | //[2] delrho (-2) |
---|
1160 | //[3] background (cm-1) |
---|
1161 | |
---|
1162 | // Variable scale,radius,delrho,bkg |
---|
1163 | // scale = w[0] |
---|
1164 | // radius = w[1] |
---|
1165 | // delrho = w[2] |
---|
1166 | // bkg = w[3] |
---|
1167 | |
---|
1168 | |
---|
1169 | // calculates scale * f^2/Vol where f=Vol*3*delrho*((sin(qr)-qrcos(qr))/qr^3 |
---|
1170 | // and is rescaled to give [=] cm^-1 |
---|
1171 | |
---|
1172 | Variable bes,f,vol,f2 |
---|
1173 | // |
---|
1174 | //handle q==0 separately |
---|
1175 | If(x==0) |
---|
1176 | f = 4/3*pi*radius^3*delrho*delrho*scale*1e8 + bkg |
---|
1177 | return(f) |
---|
1178 | Endif |
---|
1179 | |
---|
1180 | bes = 3*(sin(x*radius)-x*radius*cos(x*radius))/x^3/radius^3 |
---|
1181 | vol = 4*pi/3*radius^3 |
---|
1182 | f = vol*bes*delrho // [=] |
---|
1183 | // normalize to single particle volume, convert to 1/cm |
---|
1184 | f2 = f * f / vol * 1.0e8 // [=] 1/cm |
---|
1185 | |
---|
1186 | return (scale*f2+bkg) // Scale, then add in the background |
---|
1187 | |
---|
1188 | End |
---|
1189 | |
---|
1190 | Function/S SetConfigurationText() |
---|
1191 | |
---|
1192 | String str="",temp |
---|
1193 | |
---|
1194 | SetDataFolder root:SAS |
---|
1195 | |
---|
1196 | NVAR numberOfGuides=gNg |
---|
1197 | NVAR gTable=gTable //2=chamber, 1=table |
---|
1198 | NVAR wavelength=gLambda |
---|
1199 | NVAR lambdaWidth=gDeltaLambda |
---|
1200 | NVAR instrument = instrument |
---|
1201 | NVAR L2diff = L2diff |
---|
1202 | |
---|
1203 | |
---|
1204 | sprintf temp,"Source Aperture Diameter =\t\t%6.2f cm\r",sourceApertureDiam() |
---|
1205 | str += temp |
---|
1206 | sprintf temp,"Source to Sample =\t\t\t\t%6.0f cm\r",sourceToSampleDist() |
---|
1207 | str += temp |
---|
1208 | sprintf temp,"Sample Aperture to Detector =\t%6.0f cm\r",sampleToDetectorDist() + L2diff |
---|
1209 | str += temp |
---|
1210 | sprintf temp,"Beam diameter =\t\t\t\t\t%6.2f cm\r",beamDiameter("maximum") |
---|
1211 | str += temp |
---|
1212 | sprintf temp,"Beamstop diameter =\t\t\t\t%6.2f inches\r",beamstopDiam()/2.54 |
---|
1213 | str += temp |
---|
1214 | sprintf temp,"Minimum Q-value =\t\t\t\t%6.4f 1/ (sigQ/Q = %3.1f %%)\r",qMin(),deltaQ(qMin()) |
---|
1215 | str += temp |
---|
1216 | sprintf temp,"Maximum Horizontal Q-value =\t%6.4f 1/\r",qMaxHoriz() |
---|
1217 | str += temp |
---|
1218 | sprintf temp,"Maximum Vertical Q-value =\t\t%6.4f 1/\r",qMaxVert() |
---|
1219 | str += temp |
---|
1220 | sprintf temp,"Maximum Q-value =\t\t\t\t%6.4f 1/ (sigQ/Q = %3.1f %%)\r",qMaxCorner(),deltaQ(qMaxCorner()) |
---|
1221 | str += temp |
---|
1222 | sprintf temp,"Beam Intensity =\t\t\t\t%.0f counts/s\r",beamIntensity() |
---|
1223 | str += temp |
---|
1224 | sprintf temp,"Figure of Merit =\t\t\t\t%3.3g ^2/s\r",figureOfMerit() |
---|
1225 | str += temp |
---|
1226 | sprintf temp,"Attenuator transmission =\t\t%3.3g = Atten # %d\r",attenuatorTransmission(),attenuatorNumber() |
---|
1227 | str += temp |
---|
1228 | // |
---|
1229 | // // add text of the user-edited values |
---|
1230 | // // |
---|
1231 | sprintf temp,"***************** NG %d *****************\r",instrument |
---|
1232 | str += temp |
---|
1233 | sprintf temp,"Sample Aperture Diameter =\t\t\t\t%.2f cm\r",sampleApertureDiam() |
---|
1234 | str += temp |
---|
1235 | sprintf temp,"Number of Guides =\t\t\t\t\t\t%d \r", numberOfGuides |
---|
1236 | str += temp |
---|
1237 | sprintf temp,"Sample Chamber to Detector =\t\t\t%.1f cm\r", chamberToDetectorDist() |
---|
1238 | str += temp |
---|
1239 | if(gTable==1) |
---|
1240 | sprintf temp,"Sample Position is \t\t\t\t\t\tHuber\r" |
---|
1241 | else |
---|
1242 | sprintf temp,"Sample Position is \t\t\t\t\t\tChamber\r" |
---|
1243 | endif |
---|
1244 | str += temp |
---|
1245 | sprintf temp,"Detector Offset =\t\t\t\t\t\t%.1f cm\r", detectorOffset() |
---|
1246 | str += temp |
---|
1247 | sprintf temp,"Neutron Wavelength =\t\t\t\t\t%.2f \r", wavelength |
---|
1248 | str += temp |
---|
1249 | sprintf temp,"Wavelength Spread, FWHM =\t\t\t\t%.3f\r", lambdaWidth |
---|
1250 | str += temp |
---|
1251 | sprintf temp,"Sample Aperture to Sample Position =\t%.2f cm\r", L2Diff |
---|
1252 | str += temp |
---|
1253 | |
---|
1254 | setDataFolder root: |
---|
1255 | return str |
---|
1256 | End |
---|
1257 | |
---|
1258 | Function DisplayConfigurationText() |
---|
1259 | |
---|
1260 | if(WinType("Trial_Configuration")==0) |
---|
1261 | NewNotebook/F=0/K=1/N=Trial_Configuration /W=(480,44,880,369) |
---|
1262 | endif |
---|
1263 | //replace the text |
---|
1264 | Notebook Trial_Configuration selection={startOfFile, endOfFile} |
---|
1265 | Notebook Trial_Configuration font="Monaco",fSize=10,text=SetConfigurationText() |
---|
1266 | return(0) |
---|
1267 | end |
---|
1268 | |
---|
1269 | //parses the control for A1 diam |
---|
1270 | // updates the wave |
---|
1271 | Function sourceApertureDiam() |
---|
1272 | ControlInfo popup0 |
---|
1273 | Variable diam |
---|
1274 | sscanf S_Value, "%g cm", diam |
---|
1275 | WAVE rw=root:SAS:realsRead |
---|
1276 | rw[23] = diam*10 //sample aperture diameter in mm |
---|
1277 | return(diam) |
---|
1278 | end |
---|
1279 | |
---|
1280 | //parses the control for A2 diam |
---|
1281 | // updates the wave and global |
---|
1282 | // returns a2 in cm |
---|
1283 | Function sampleApertureDiam() |
---|
1284 | ControlInfo popup0_1 |
---|
1285 | |
---|
1286 | //set the global |
---|
1287 | NVAR a2=root:SAS:gSamAp |
---|
1288 | //1st item is 1/16", popup steps by 1/16" |
---|
1289 | a2 = 2.54/16.0 * (V_Value) |
---|
1290 | |
---|
1291 | WAVE rw=root:SAS:realsRead |
---|
1292 | rw[24] = a2*10 //sample aperture diameter in mm |
---|
1293 | |
---|
1294 | return(a2) |
---|
1295 | end |
---|
1296 | |
---|
1297 | //1=huber 2=chamber |
---|
1298 | Function tableposition() |
---|
1299 | ControlInfo checkHuber |
---|
1300 | if(V_Value) |
---|
1301 | return(1) //huber |
---|
1302 | else |
---|
1303 | return(2) //chamber |
---|
1304 | endif |
---|
1305 | End |
---|
1306 | |
---|
1307 | //compute SSD and update both the global and the wave |
---|
1308 | // |
---|
1309 | Function sourceToSampleDist() |
---|
1310 | |
---|
1311 | NVAR NG=root:SAS:gNg |
---|
1312 | NVAR S12 = root:SAS:S12 |
---|
1313 | NVAR L2Diff = root:SAS:L2Diff |
---|
1314 | NVAR SSD = root:SAS:gSSD |
---|
1315 | |
---|
1316 | SSD = 1632 - 155*NG - s12*(2-tableposition()) - L2Diff |
---|
1317 | |
---|
1318 | WAVE rw=root:SAS:realsRead |
---|
1319 | rw[25] = SSD/100 // in meters |
---|
1320 | return(SSD) |
---|
1321 | End |
---|
1322 | |
---|
1323 | //returns the offset value |
---|
1324 | // slider and setVar are linked to the same global |
---|
1325 | // updates the wave and changes the beamcenter (x,y) in the wave |
---|
1326 | Function detectorOffset() |
---|
1327 | |
---|
1328 | WAVE rw=root:SAS:RealsRead |
---|
1329 | NVAR val = root:SAS:gOffset |
---|
1330 | rw[19] = val // already in cm |
---|
1331 | //move the beamcenter |
---|
1332 | rw[16] = 64 + 2*rw[19] //approximate beam X is 64 w/no offset, 114 w/25 cm offset |
---|
1333 | rw[17] = 64 //typical value |
---|
1334 | |
---|
1335 | return(val) |
---|
1336 | end |
---|
1337 | |
---|
1338 | //returns the detector distance (slider and setVar are linked by the global) |
---|
1339 | // |
---|
1340 | Function chamberToDetectorDist() |
---|
1341 | |
---|
1342 | NVAR val = root:SAS:gDetDist |
---|
1343 | return(val) |
---|
1344 | End |
---|
1345 | |
---|
1346 | //sets the SDD (slider and setVar are linked by the global and is the detector position |
---|
1347 | // relative to the chamber) |
---|
1348 | // updates the wave |
---|
1349 | Function sampleToDetectorDist() |
---|
1350 | |
---|
1351 | NVAR detDist = root:SAS:gDetDist |
---|
1352 | NVAR S12 = root:SAS:S12 |
---|
1353 | WAVE rw=root:SAS:RealsRead |
---|
1354 | Variable SDD |
---|
1355 | |
---|
1356 | SDD = detDist + s12*(2-tableposition()) |
---|
1357 | rw[18] = SDD/100 // convert to meters |
---|
1358 | return(SDD) |
---|
1359 | End |
---|
1360 | |
---|
1361 | //direction = one of "vertical;horizontal;maximum;" |
---|
1362 | Function beamDiameter(direction) |
---|
1363 | String direction |
---|
1364 | |
---|
1365 | Variable l1 = sourceToSampleDist() |
---|
1366 | Variable l2 //= sampleAperToDetDist() |
---|
1367 | Variable d1,d2,bh,bv,bm,umbra,a1,a2 |
---|
1368 | |
---|
1369 | NVAR L2diff = root:SAS:L2diff |
---|
1370 | NVAR lambda = root:SAS:gLambda |
---|
1371 | NVAR lambda_width = root:SAS:gDeltaLambda |
---|
1372 | NVAR bs_factor = root:SAS:bs_factor |
---|
1373 | |
---|
1374 | l2 = sampleToDetectorDist() + L2diff |
---|
1375 | a1 = sourceApertureDiam() |
---|
1376 | a2 = sampleApertureDiam() |
---|
1377 | |
---|
1378 | d1 = a1*l2/l1 |
---|
1379 | d2 = a2*(l1+l2)/l1 |
---|
1380 | bh = d1+d2 //beam size in horizontal direction |
---|
1381 | umbra = abs(d1-d2) |
---|
1382 | //vertical spreading due to gravity |
---|
1383 | bv = bh + 1.25e-8*(l1+l2)*l2*lambda*lambda*lambda_width |
---|
1384 | bm = (bs_factor*bh > bv) ? bs_factor*bh : bv //use the larger of horiz*safety or vertical |
---|
1385 | |
---|
1386 | strswitch(direction) // string switch |
---|
1387 | case "vertical": // execute if case matches expression |
---|
1388 | return(bv) |
---|
1389 | break // exit from switch |
---|
1390 | case "horizontal": // execute if case matches expression |
---|
1391 | return(bh) |
---|
1392 | break |
---|
1393 | case "maximum": // execute if case matches expression |
---|
1394 | return(bm) |
---|
1395 | break |
---|
1396 | default: // optional default expression executed |
---|
1397 | return(bm) // when no case matches |
---|
1398 | endswitch |
---|
1399 | End |
---|
1400 | |
---|
1401 | //on NG3 and NG7, allowable sizes are 1,2,3,4" diameter |
---|
1402 | //will return values larger than 4.0*2.54 if a larger beam is needed |
---|
1403 | Function beamstopDiam() |
---|
1404 | |
---|
1405 | Variable bm = beamDiameter("maximum") |
---|
1406 | Variable bs=0.0 |
---|
1407 | |
---|
1408 | do |
---|
1409 | bs += 1 |
---|
1410 | while ( (bs*2.54 < bm) || (bs > 30.0)) //30 = ridiculous limit to avoid inf loop |
---|
1411 | |
---|
1412 | //update the wave |
---|
1413 | WAVE rw=root:SAS:realsRead |
---|
1414 | rw[21] = bs*25.4 //store the BS diameter in mm |
---|
1415 | |
---|
1416 | return (bs*2.54) //return diameter in cm, not inches for txt |
---|
1417 | End |
---|
1418 | |
---|
1419 | |
---|
1420 | Function qMin() |
---|
1421 | |
---|
1422 | Variable l2s = sampleToDetectorDist() //distance from sample to detector |
---|
1423 | Variable bs = beamstopDiam() //beamstop diameter |
---|
1424 | NVAR lambda = root:SAS:gLambda |
---|
1425 | NVAR d_det = root:SAS:d_det |
---|
1426 | NVAR a_pixel = root:SAS:a_pixel |
---|
1427 | |
---|
1428 | return( (pi/lambda)*(bs + d_det + a_pixel)/l2s ) |
---|
1429 | End |
---|
1430 | |
---|
1431 | Function qMaxVert() |
---|
1432 | |
---|
1433 | Variable theta |
---|
1434 | Variable l2s = sampleToDetectorDist() //distance from sample to detector |
---|
1435 | NVAR lambda = root:SAS:gLambda |
---|
1436 | NVAR det_width = root:SAS:det_width |
---|
1437 | |
---|
1438 | theta = atan( (det_width/2.0)/l2s ) |
---|
1439 | |
---|
1440 | return ( 4.0*pi/lambda * sin(theta/2.0) ) |
---|
1441 | end |
---|
1442 | |
---|
1443 | Function qMaxCorner() |
---|
1444 | |
---|
1445 | Variable l2s = sampleToDetectorDist() //distance from sample to detector |
---|
1446 | Variable radial |
---|
1447 | NVAR lambda = root:SAS:gLambda |
---|
1448 | NVAR det_off = root:SAS:gOffset |
---|
1449 | NVAR det_width = root:SAS:det_width |
---|
1450 | |
---|
1451 | radial=sqrt( (0.5*det_width)*(0.5*det_width)+(0.5*det_width+det_off)*(0.5*det_width+det_off) ) |
---|
1452 | |
---|
1453 | return ( 4*pi/lambda*sin(0.5*atan(radial/l2s)) ) |
---|
1454 | End |
---|
1455 | |
---|
1456 | Function qMaxHoriz() |
---|
1457 | |
---|
1458 | Variable theta |
---|
1459 | Variable l2s = sampleToDetectorDist() //distance from sample to detector |
---|
1460 | NVAR lambda = root:SAS:gLambda |
---|
1461 | NVAR det_off = root:SAS:gOffset |
---|
1462 | NVAR det_width = root:SAS:det_width |
---|
1463 | |
---|
1464 | theta = atan( ((det_width/2.0)+det_off)/l2s ) //from the instance variables |
---|
1465 | |
---|
1466 | return ( 4.0*pi/lambda * sin(theta/2.0) ) |
---|
1467 | End |
---|
1468 | |
---|
1469 | // calculate sigma for the resolution function at either limit of q-range |
---|
1470 | Function deltaQ(atQ) |
---|
1471 | Variable atQ |
---|
1472 | |
---|
1473 | Variable k02,lp,l1,l2,sig_02,sigQ2,a1,a2 |
---|
1474 | NVAR l2Diff = root:SAS:L2diff |
---|
1475 | NVAR lambda = root:SAS:gLambda |
---|
1476 | NVAR lambda_width = root:SAS:gDeltaLambda |
---|
1477 | NVAR d_det = root:SAS:d_det |
---|
1478 | NVAR del_r = root:SAS:del_r |
---|
1479 | |
---|
1480 | |
---|
1481 | l1 = sourceToSampleDist() |
---|
1482 | l2 = sampleToDetectorDist() + L2diff |
---|
1483 | a1 = sourceApertureDiam() |
---|
1484 | a2 = sampleApertureDiam() |
---|
1485 | |
---|
1486 | k02 = (6.2832/lambda)*(6.2832/lambda) |
---|
1487 | lp = 1/(1/l1 + 1/l2) |
---|
1488 | |
---|
1489 | sig_02 = (0.25*a1/l1)*(0.25*a1/l1) |
---|
1490 | sig_02 += (0.25*a2/lp)*(0.25*a2/lp) |
---|
1491 | sig_02 += (d_det/(2.355*l2))*(d_det/(2.355*l2)) |
---|
1492 | sig_02 += (del_r/l2)*(del_r/l2)/12 |
---|
1493 | sig_02 *= k02 |
---|
1494 | |
---|
1495 | sigQ2 = sig_02 + (atQ*lambda_width)*(atQ*lambda_width)/6 |
---|
1496 | |
---|
1497 | return(100*sqrt(sigQ2)/atQ) |
---|
1498 | End |
---|
1499 | |
---|
1500 | |
---|
1501 | Function beamIntensity() |
---|
1502 | |
---|
1503 | Variable alpha,f,t,t4,t5,t6,as,solid_angle,l1,d2_phi |
---|
1504 | Variable a1,a2,retVal |
---|
1505 | SetDataFolder root:SAS |
---|
1506 | NVAR l_gap=l_gap,guide_width =guide_width,ng = gNg |
---|
1507 | NVAR lambda_t=lambda_t,b=b,c=c |
---|
1508 | NVAR lambda=gLambda,t1=t1,t2=t2,t3=t3,phi_0=phi_0 |
---|
1509 | NVAR lambda_width=gDeltaLambda |
---|
1510 | |
---|
1511 | l1 = sourceToSampleDist() |
---|
1512 | a1 = sourceApertureDiam() |
---|
1513 | a2 = sampleApertureDiam() |
---|
1514 | |
---|
1515 | |
---|
1516 | alpha = (a1+a2)/(2*l1) //angular divergence of beam |
---|
1517 | f = l_gap*alpha/(2*guide_width) |
---|
1518 | t4 = (1-f)*(1-f) |
---|
1519 | t5 = exp(ng*ln(0.96)) // trans losses of guides in pre-sample flight |
---|
1520 | t6 = 1 - lambda*(b-(ng/8)*(b-c)) //experimental correction factor |
---|
1521 | t = t1*t2*t3*t4*t5*t6 |
---|
1522 | |
---|
1523 | as = pi/4*a2*a2 //area of sample in the beam |
---|
1524 | d2_phi = phi_0/(2*pi) |
---|
1525 | d2_phi *= exp(4*ln(lambda_t/lambda)) |
---|
1526 | d2_phi *= exp(-1*(lambda_t*lambda_t/lambda/lambda)) |
---|
1527 | |
---|
1528 | solid_angle = pi/4* (a1/l1)*(a1/l1) |
---|
1529 | |
---|
1530 | retVal = as * d2_phi * lambda_width * solid_angle * t |
---|
1531 | SetDataFolder root: |
---|
1532 | return (retVal) |
---|
1533 | end |
---|
1534 | |
---|
1535 | Function figureOfMerit() |
---|
1536 | |
---|
1537 | Variable bi = beamIntensity() |
---|
1538 | NVAR lambda = root:SAS:gLambda |
---|
1539 | |
---|
1540 | return (lambda*lambda*bi) |
---|
1541 | End |
---|
1542 | |
---|
1543 | //estimate the number of pixels in the beam, and enforce the maximum countrate per pixel (idmax) |
---|
1544 | Function attenuatorTransmission() |
---|
1545 | |
---|
1546 | Variable num_pixels,i_pix //i_pix = id in John's notation |
---|
1547 | Variable bDiam = beamDiameter("horizontal") //!! note that prev calculations used bh (horizontal) |
---|
1548 | Variable atten,a2 |
---|
1549 | SetDataFolder root:SAS |
---|
1550 | NVAR a_pixel=a_pixel,idmax=idmax |
---|
1551 | |
---|
1552 | a2 = sampleApertureDiam() |
---|
1553 | |
---|
1554 | num_pixels = pi/4*(0.5*(a2+bDiam))*(0.5*(a2+bDiam))/a_pixel/a_pixel |
---|
1555 | i_pix = ( beamIntensity() )/num_pixels |
---|
1556 | |
---|
1557 | atten = (i_pix < idmax) ? 1.0 : idmax/i_pix |
---|
1558 | SetDataFolder root: |
---|
1559 | return(atten) |
---|
1560 | End |
---|
1561 | |
---|
1562 | Function attenuatorNumber() |
---|
1563 | |
---|
1564 | Variable atten = attenuatorTransmission() |
---|
1565 | Variable af,nf,numAtten |
---|
1566 | SetDataFolder root:SAS |
---|
1567 | NVAR lambda=gLambda |
---|
1568 | |
---|
1569 | af = 0.498 + 0.0792*lambda - 1.66e-3*lambda*lambda |
---|
1570 | nf = -ln(atten)/af //floating point |
---|
1571 | |
---|
1572 | numAtten = trunc(nf) + 1 //in c, (int)nf |
---|
1573 | //correct for larger step thickness at n > 6 |
---|
1574 | if(numAtten > 6) |
---|
1575 | numAtten = 7 + trunc( (numAtten-6)/2 ) //in c, numAtten = 7 + (int)( (numAtten-6)/2 ) |
---|
1576 | endif |
---|
1577 | |
---|
1578 | SetDatafolder root: |
---|
1579 | return (numAtten) |
---|
1580 | End |
---|