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McStas: Pol_guide_mirror

[ Identification | Description | Input parameters | Links ]

The Pol_guide_mirror Component

Polarising guide with a supermirror along its diagonal.


  • Site:
  • Author: Erik B Knudsen
  • Origin: DTU Physics
  • Date: July 2018


Based on Pol_guide_vmirror by P. Christiansen.
Models a rectangular guide with entrance centered on the Z axis and
with one supermirros sitting on the diagonal inside.
The entrance lies in the X-Y plane.  Draws a true depiction
of the guide with mirror and trajectories.
The polarisation is handled similar to in Monochromator_pol.
The reflec functions are handled similar to Pol_mirror.
The up direction is hardcoded to be along the y-axis (0, 1, 0)

Note that this component can also be used as a frame overlap-mirror
if the up and down reflectivities are set equal. In this case the wall
refletivity (rPar) should probably be set to absorb.

The parameters can either be
double pointer initializations (e.g. {R0, Qc, alpha, m, W})
or table names (e.g."supermirror_m2.rfl" AND useTables=1).
NB! This might cause warnings by the compiler that can be ignored.


No absorption by mirror.

Input parameters

Parameters in boldface are required; the others are optional.
xwidthmWidth at the guide entry
yheightmHeight at the guide entry
lengthmlength of guide
rFunc1Guide Reflection functionStdReflecFunc
rUpFunc1Mirror Reflection function for spin upStdReflecFunc
rDownFunc1Mirror Reflection function for spin downStdReflecFunc
rPar1Guide Parameters for rFunc{1.0, 0.0219, 4.07, 3.2, 0.003}
rUpPar1Mirror Parameters for rUpFunc{1.0, 0.0219, 4.07, 3.2, 0.003}
rDownPar1Mirror Parameters for rDownFunc{0.1, 0.0219, 4.07, 3.2, 0.003}
debug1if debug > 0 print out some internal runtime parameters0


[ Identification | Description | Input parameters | Links ]

Generated on 2024-01-03 11:47:43

Last Modified: Wednesday, 03-Jan-2024 19:59:11 CET
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