[mcstas-users] Virtual experiment problem

[陈彦舟]

Hi all,

I am conducting a virtual experiment by McStas. The sample is a column-shaped alpha-Fe. I change the radius of it and compare the diffraction patterns. The diffraction patterns change along with the varied radius value. For example the peak around 85°in figure 1 (radius=10mm,in enclosure) vanishes in figure 2 (radius=2mm) while other diffraction peaks are still visible. This phenomenon is not expected.You may have a look at the pdc1.instr and pdc2.instr in enclosure.

 

 

The other question is that we can find dozens of small peaks besides the diffraction peaks(See banana.th file).What are they? The background?

The Ncount=10E8 and nrepeat=1000.

I’m looking forward your reply. Thank you.

 

Best wishes,

Tom

 



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