[mcstas-users] texture simulaion

[Dariusz Wardecki - UKRI STFC]

Dear all,


I am trying to simulate texture in a powder sample using McStas-2.4.1. For this purpose I wanted to use the Single_crystal component with the "powder" parameter. I started with an ideal powder using powder=1 and two monitors PSD_4pi and TOF at 90 deg to test the results. It turns out that when I compare this result with the one from the PowderN component I get completely different distribution of neutrons on the sphere as well as the wrong intensities from TOF.  It does not look like an ideal powder at all.


Does anybody have an idea what I  am doing wrong?


I use the following option:

SPLIT 200 COMPONENT sample = Single_crystal(radius=0.002, yheight=0.01,
          reflections="Al.lau", powder=1, order=1, mosaic=5)



Regards,

Dariusz