[mcstas-users] Finite transmission probability for DiskChopper component

[Marc Seifert]

Hello everyone,

we are simulating a chopper system over a large wavelength spectrum (0.5 
to 10 AA). We would like to consider finite transmission of the choppers 
and we expect this to be 1E-7 for 3 AA and up to 0.007 for 1 AA. We 
would like to simulate the overall impact on the performance of the 
instrument by implementing a transmission probability to the DiskChopper 
component, but we are not sure which would be the best approach.

Is it possible to check in the EXTEND section of a DiskChopper if the 
neutron was absorbed and then restore it with a certain probability? Or 
would it be better to change the neutron weight instead of absorbing it 
in the component? Additionally with a cutoff at a certain wavelength in 
order to not propagate every neutron with very tiny weight through the 
whole instrument.

Any help is very much appreciated.

Cheers,
Marc Seifert and Aureliano Tartaglione