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

The Guide component

Neutron guide.

Identification

• Author: KN
• Origin: McStas release
• Date: September 2 1998
• Version: 1.8
• Modification history:
  • KL, October 6, 1998

Description

Models a rectangular guide tube centered on the Z axis. The entrance lies
in the X-Y plane.
For details on the geometry calculation see the description in the McStas
reference manual.

Example values: m=4 Qc=0.02 W=1/300 alpha=6.49 R0=1

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
w1	m	Width at the guide entry
h1	m	Height at the guide entry
w2	m	Width at the guide exit
h2	m	Height at the guide exit
l	m	length of guide
R0	1	Low-angle reflectivity
Qc	AA-1	Critical scattering vector
alpha	AA	Slope of reflectivity
m	1	m-value of material. Zero means completely absorbing.
W	AA-1	Width of supermirror cut-off

Output parameters

None.

Links

• Source code for Guide.comp.

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

Generated automatically by McDoc, Kristian Nielsen <kristian.nielsen@risoe.dk> / Jan 22 2001

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Last Modified: Tuesday, 22-Jun-2004 14:04:09 CEST