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McStas: Collimator_linear

[ Identification | Description | Input parameters | Links ]

The Collimator_linear Component

A simple analytical Soller collimator (with triangular transmission).

Identification

  • Site:
  • Author: Kristian Nielsen
  • Origin: Risoe
  • Date: August 1998

Description

Soller collimator with rectangular opening and specified length. The
transmission function is an average and does not utilize knowledge of the
actual neutron trajectory. A zero divergence disables collimation (then the
component works as a double slit).

Example: Collimator_linear(xmin=-0.1, xmax=0.1, ymin=-0.1, ymax=0.1, length=0.25, divergence=40,transmission=0.7)

Input parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault
xminmLower x bound on slits-0.02
xmaxmUpper x bound on slits0.02
yminmLower y bound on slits-0.05
ymaxmUpper y bound on slits0.05
xwidthmWidth of slits0
yheightmHeight of slits0
lengthmDistance between input and output slits0.3
divergenceminutes of arcDivergence horizontal angle (calculated as atan(d/length), where d is the blade spacing)40
transmission1Transmission of Soller (0<=t<=1)1
divergenceVminutes of arcDivergence vertical angle0
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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