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

The Source_flux_lambda component

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

Identification

Description

The routine is a circular 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 uniformly distrubuted between lambda_0 - d_lambda and
lambda_0 + d_lambda. The source flux is specified in neutrons per steradian
per square cm per AAngstroem.

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.  
dist m Distance to target along z axis.  
xw m Width(x) of target  
yh m Height(y) of target  
lambda_0 AA Mean wavelength of neutrons.  
d_lambda AA Wavelength spread of neutrons.  
flux 1/(cm**2*st*AA) Source flux  

Output parameters

Name Unit Description Default
hdiv  
vdiv  
p_in  

Links

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

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