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McStas: SE_example2

[ Identification | Description | Input parameters | Links ]

The SE_example2 Instrument

Mockup of transmission Spin-Echo, written for PNCMI 2010 school in Delft. This version uses Pol_FieldBox for description of the fields.


  • Site: Templates
  • Author: Erik Knudsen, Peter Willendrup
  • Origin: Risoe
  • Date: June 2010


This instrument shows the use of essential McStas polarisation components, including Pol_mirror, Pol_FieldBox and MeanPolLambda_monitor.

Pol_mirror is used to polarize and analyze the incoming and scattered beams.
Pol_FieldBox is used to define guidefields and flippers.
MeanPolLambda_montior is used to monitor beam polarisation.

Example: mcrun SE_example2.instr dBz=-0.0001,0.0001 -N41 -n1e5

Input parameters

Parameters in boldface are required; the others are optional.
POL_ANGLEdegReflection angle of polarizer/analyzer2
SAMPLE1Flag to include (0) or exclude incoherent scatterer0
BguideTField magnitude in guide fields0.1
BflipTMagnitude of flipper fields,3e-4
dBzTMagnitude field perturbation in first guide field0
LamAngstromMean wavelength of neutrons emitted from source8
dLamAngstromWavelength spread of neutrons emitted from source0.8


  • Source code for SE_example2.instr.
  • Requires mcstas 1.12b (or beta). PolLambda_monitor has been modified to work (nL->nlam)

[ 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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