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McStas: Test_Fermi

[ Identification | Description | Input parameters | Links ]

The Test_Fermi Instrument

Cross comparison of Fermi Chopper components

Identification

  • Site: Tests_optics
  • Author: E. Farhi [farhi@ill.fr]
  • Origin: ILL
  • Date: Sept 1st, 2008

Description

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.

Input parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault
Fermi1Choice of Fermi chopper component to test, with 1=FermiChopper, 3=FermiChopper_ILL, 4=rotating Guide_gravity, 5=rotating Guide_channeled1
lambdaAAMean wavelength from source3.39
width_FCmtotal slit pack width0.044
height_FCmheight of FC slit pack0.064
length_FCmlength of FC slit pack0.012
FC_HzHzrotation speed. Omega=2*PI*nu in rad/s, nu*60 in rpm100
Nslit_FCNumber of slits in FC slit package120
d_SFmdistance from Source to FC center3
d_FDmdistance from FC center to Detector3
phasedegFC phase. Use -0 for automatic271.92
time_to_arrival0
time_window_width0

Links


[ Identification | Description | Input parameters | Links ]

Generated on 2023-09-19 20:01:36


Last Modified: Tuesday, 16-Apr-2024 20:05:20 CEST
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