Opened 14 years ago
Closed 9 years ago
#164 closed feature (shelved)
X-ray mode for analysis models
Reported by: | srkline | Owned by: | srkline |
---|---|---|---|
Priority: | major | Milestone: | Wish List |
Component: | Analysis | Keywords: | |
Cc: | Blocking: | ||
Task: |
Description
Quoting "Karen Edler" <K.Edler@…>:
Steve,
Just wondering - would there be any scope for including an "X-ray mode" in the SANS models? We use the models a lot for modelling X-ray data alongside the neutron data but I have to hack the code to put in an extra fudge factor for the X-rays as they are not on an absolute scale unlike the neutron data. For the form factor models this isnt a problem as the volume fraction play this role but on the structure factor models it would be nice to be able to put in known (or at least best guessed) volume fractions and scattering length densities, but have the ability to scale the fit for the X-rays while doing it "properly" for the SANS.
cheers
Karen
Change History (4)
comment:1 Changed 13 years ago by srkline
comment:2 Changed 13 years ago by srkline
Can I write a generic wrapper function that will take the SANS function and add an additional scale factor coef[0] to the model? don't want to add the extra scale factor at the end of the coef list, this is sometimes assumed to be the background.
comment:3 Changed 12 years ago by ajj
- Milestone changed from Analysis Wish List to Wish List
comment:4 Changed 9 years ago by srkline
- Resolution set to shelved
- Status changed from new to closed
Analysis items shelved
Lots of work to do this - would require re-writing ALL of the model functions that have S(q) and are on absolute scale, to add an extra scale parameter. Ow.
Suggest that the users enter their best guesses for volume fraction and electron densities, and rescale the data prior. Then small errors in the scaling could be absorbed in the SLD(s).