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

The Source_simple Component

A circular neutron source with flat energy spectrum and arbitrary flux

Identification

• Author: Kim Lefmann
• Origin: Risoe
• Date: October 30, 1997
• Version: 1.9
• Modification history:
  • KL, October 4, 2001
  • Emmanuel Farhi, October 30, 2001. Serious bug corrected.

Description

The routine is a circular or rectangular neutron source, which aims at a square target
centered at the beam (in order to improve MC-acceptance rate).  The angular
divergence is then given by the dimensions of the target.
The neutron energy is uniformly distributed between E0-dE and E0+dE.

This component replaces Source_flat, Source_flat_lambda,
Source_flux and Source_flux_lambda.

Example: Source_simple(radius=0.1, dist=2, xw=.1, yh=.1, E0=14, dE=2)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
radius	m	Radius of circle in (x,y,0) plane where neutrons are generated.	0
height	m	Height of rectangle in (x,y,0) plane where neutrons are generated.	0
width	m	Width of rectangle in (x,y,0) plane where neutrons are generated.	0
dist	m	Distance to target along z axis.
xw	m	Width(x) of target
yh	m	Height(y) of target
E0	meV	Mean energy of neutrons.	0
dE	meV	Energy spread of neutrons (flat or gaussian sigma).	0
Lambda0	AA	Mean wavelength of neutrons.	0
dLambda	AA	Wavelength spread of neutrons.	0
flux	1/(s*cm**2*st)	Energy integrated flux	1
gauss	1	Gaussian (1) or Flat (0) energy/wavelength distribution	0
compat	1	Apply weighting/sampling as now obsolete Source_flat component	0

Output parameters

Name	Unit	Description	Default
pmul

Links

• Source code for Source_simple.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