Mosaic diffraction line widths

[bbazi]

Hi,

I am trying to raytrace the diffraction lines of (highly-)curved mosaic (i.e. HAPG) crystal optics as presented in literature, see paper links attached below. My goal is to raytrace the (cylindrical) diffraction lines of (highly-)curved HAPG optics in an accurate manner to be able to extract the mosaicity. Accurate/reliable rocking-curve experiments of highly-curved (cylindrical) mosaic optics are not always feasible.

See here below 4 literature examples of HAPG cylindrical diffraction lines and my XRT simulations next to it. The XRT codes used to produce these simulations are attached below as a zip-file. In all examples, I find that the simulated diffraction line widths are thinner than the literature experiments (by looking at the ring average pixel width). calcBorrmann was set to None, I also tried 'uniform' but the result was basically the same. I did not use 'TT' as I understand that only works for the Laue condition. Do you see by any chance the parameters which are not correct in my XRT scripts?

I saw that there will be a future version of XRT that will focus on elastically deformed crystals. Will this also have an impact on mosaic crystals?

PS: I have plotted the XRT simulations by using the 'total2D' array from XRT's plotter.py

HAPG_literature_xrt.zip

Literature HAPG cylindrical diffraction lines:
2014_Anklamm et al.: https://pubs.aip.org/aip/rsi/article-abstract/85/5/053110/309641/A-novel-von-Hamos-spectrometer-for-efficient-X-ray?redirectedFrom=fulltext
2017_Schlesiger et al.: https://scripts.iucr.org/cgi-bin/paper?aj5296
2018_Malzer et al.: https://pubs.aip.org/aip/rsi/article/89/11/113111/363773/A-laboratory-spectrometer-for-high-throughput-X
2019_Wansleben et al.: https://iopscience.iop.org/article/10.1088/1681-7575/ab40d2/meta

Best and thanks for your time,
Benjamin