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

The Focalisation Instrument

Test instrument for neutron focalisation with a set of supermirrors. No guide / velocity selector One parabolic SM converges the incoming beam to its focal point, then one elliptic SM (with primary focal point at same location as parabolic SM focal point) images the focal point onto the detector.

Identification

• Site: LLB
• Author: Sylvain Desert
• Origin: LLB
• Date: 2007.
• Version: 1.4

Description

Test instrument for the MirrorElli and MirrorPara components

Example: mcrun Focalisation.instr Qmin=0.0001 G=1 H=.0001 F=.00066 DET=8.2 lambda=14 divergence=.1 BeamWidth=.05 TetaMin=3

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
Qmin	AA^-1	Minimum momentum transfer on the detector	.0001
G	1	Ratio of the mirror focal length = increase in accepted divergence angle	1
H	m	Height of mirrors	.0001
F	m	Parabolic focal	.00066
DET	m	Distance between the two elliptic focal points	8.2
lambda	AA	Mean wavelength of neutrons	14
divergence	deg	source divergence	.1
BeamWidth	m	Length of the source to focalize	.05
TetaMin	deg	Minimum angle that must be reflected by the device assuming m=3 SM (TetaMin=3 for 5A and above neutron)	3

Links

• Source code for Focalisation.instr.

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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri May 11 08:41:09 2012

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Last Modified: Friday, 11-May-2012 10:41:09 CEST