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

The Source_Maxwell Component

Neutron source with Maxwellian wavelength spectrum and user-specified flux.

Identification

Description

The routine is a 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
wavelength is distributed between lambda_0 - d_lambda and
lambda_0 + d_lambda with a Maxwellian profile.
The source flux is specified in neutrons per steradian per square cm for the
Maxwellian distribution. Source output is in [n/s/cm^2/Angs]
The flux profile is flat for T=0.
OBSOLETE: wrong results ! rather use sources/Source_Maxwell_3 or Source_gen

%BUGS
Produces wrong results

Example:
COMPONENT Source = Source_Maxwell(
  h        = 0.220, w        = 0.160,
  dist     = 2.33, xw       = 0.038, yh       = 0.2,
  lambda_0 = 2,    d_lambda = 1.5,
  flux     = 1e13, T        = 315)
AT (0,0,0) ABSOLUTE
WARNING: This is an obsolete Component.Please avoid usage whenever possible.

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
h m Height of rectangle in (x,y,0) plane where neutrons are generated. 0.1
w m Width of rectangle 0.1
dist m Distance to target along z axis. 2.33
xw m Width(x) of target 0.05
yh m Height(y) of target 0.1
lambda_0 AA Mean wavelength of neutrons. 2.36
d_lambda AA Wavelength spread of neutrons. 0.1627
flux 1/(cm**2*st) Source flux 1e13
T K The temperature of the source (293 K) 315

Output parameters

Name Unit Description Default
p_in  

Links

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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Sat Jun 27 03:24:05 2009