Cross comparison of Fermi Chopper components, using McStas and
contributed components, as well as rotating collimator approximations. It
shows that all implementations are equivalent. However, approximating rotating
guide are 30% faster than McStas Fermi chopper, and on the other hand
Vitess implementation is 100 times slower.
Parameters in boldface are required;
the others are optional.
Choice of Fermi chopper component to test, with 1=FermiChopper, 2=Vitess_ChopperFermi, 3=FermiChopper_ILL, 4=rotating Guide_gravity, 5=rotating Guide_channeled
total slit pack width
height of FC slit pack
length of FC slit pack
rotation speed. Omega=2*PI*nu in rad/s, nu*60 in rpm