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McStas: Exact_radial_coll

[ Identification | Description | Input parameters | Links ]

The Exact_radial_coll Component

An exact radial Soller collimator.

Identification

  • Site:
  • Author: Roland Schedler
  • Origin: HMI
  • Date: October 2006

Description

Radial Soller collimator with rectangular opening, specified length and
specified foil thickness.
The collimator is made of many trapezium shaped nslit stacked radially.
The nslit are separated by absorbing foils, the whole stuff is inside
an absorbing housing.
The component should be positioned at the radius center. The model is exact.
The neutron beam outside the collimator area is transmitted unaffected.

Example: Exact_radial_coll(theta_min=-5, theta_max=5, nslit=100,
radius=1.0, length=.3, h_in=.2, h_out=.3, d=0.0001)

Input parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault
theta_mindegMinimum Theta angle for the radial setting-5
theta_maxdegMaximum Theta angle for the radial setting5
nslit1Number of channels in the theta range100
radiusmInner radius (focus point to foil start point).1.0
lengthmLength of the foils / collimator.5
h_inmInput window height.3
h_outmOutput window height.4
dmThickness of the absorbing foils0.0001
verbose0/1Gives additional information0
AT ( , , ) RELATIVE
ROTATED ( , , ) RELATIVE

Links


[ 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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