[ Identification | Description | Input parameters | Output parameters | Links ]

The Collimator_linear Component

A simple analytical Soller collimator (with triangular transmission).

Identification

• Author: Kristian Nielsen
• Origin: Risoe
• Date: August 1998
• Version: 1.16
• Modification history:
  • GA, June 1999, added transmission

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,
          len=0.25, divergence=40,transmission=0.7)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
xmin	m	Lower x bound on slits	0
xmax	m	Upper x bound on slits	0
ymin	m	Lower y bound on slits	0
ymax	m	Upper y bound on slits	0
xwidth	m	Width of slits	0
yheight	m	Height of slits	0
len	m	Distance between slits
divergence	minutes of arc	Divergence horizontal angle (calculated as atan(d/len), where d is the blade spacing)	40
transmission	1	Transmission of Soller (0<=t<=1)	1
divergenceV	minutes of arc	Divergence vertical angle	0

Output parameters

Name	Unit	Description	Default
slope
slopeV

Links

• Source code for Collimator_linear.comp.

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[ Identification | Description | Input parameters | Output parameters | Links ]

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri Feb 10 19:36:33 2012

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Last Modified: Friday, 10-Feb-2012 20:36:33 CET