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

The Source_Maxwell_3 Component

Source with up to three Maxwellian distributions

Identification

• Author: Kim Lefmann
• Origin: Risoe
• Date: March 2001
• Version: 1.17

Description

A parametrised continuous source for modelling a (cubic) source
with (up to) 3 Maxwellian distributions.
The source produces a continuous spectrum.
The sampling of the neutrons is uniform in lambda.

Units of flux: neutrons/cm^2/second/ster
(McStas units are in general neutrons/second)

Example:  PSI cold source T1=150.42 K / 2.51 AA     I1 = 3.67 E11
                          T2=38.74 K / 4.95 AA      I2 = 3.64 E11
                          T3=14.84 K / 9.5 AA       I3 = 0.95 E11

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
size	m	Edge of cube shaped source (for backward compatibility)	0
height	m	Height of rectangular source	0
width	m	Width of rectangular source	0
l_low	AA	Lower edge of lambda distribution
l_high	AA	Upper edge of lambda distribution
dist	m	Distance from source to focusing rectangle; at (0,0,dist)
xw	m	Width of focusing rectangle
yh	m	Height of focusing rectangle
T1	K	1st temperature of thermal distribution
T2	K	2nd temperature of thermal distribution	300
T3	K	3nd temperature of - - -	300
I1	*	l-integrated flux, 1 (in flux units, see above)
I2	*	l-integrated flux, 2 (in flux units, see above)	0
I3	*	l-integrated flux, 3 - - -	0

Output parameters

Name	Unit	Description	Default
M
l_range
w_mult
w_source
h_source

Links

• Source code for Source_Maxwell_3.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