About McStas Download Documentation 
[ Identification  Description  Input parameters  Output parameters  Links ] The
A circular neutron source with flat energy spectrum and arbitrary flux

Name  Unit  Description  Default 

radius  m  Radius of circle in (x,y,0) plane where neutrons are generated.  0.1 
yheight  m  Height of rectangle in (x,y,0) plane where neutrons are generated.  0 
xwidth  m  Width of rectangle in (x,y,0) plane where neutrons are generated.  0 
dist  m  Distance to target along z axis.  0 
focus_xw  m  Width of target  .045 
focus_yh  m  Height of target  .12 
E0  meV  Mean energy of neutrons.  0 
dE  meV  Energy half spread of neutrons (flat or gaussian sigma).  0 
lambda0  AA  Mean wavelength of neutrons.  0 
dlambda  AA  Wavelength half spread of neutrons.  0 
flux  1/(s*cm**2*st*energy unit)  flux per energy unit, Angs or meV if flux=0, the source emits 1 in 4*PI whole space.  1 
gauss  1  Gaussian (1) or Flat (0) energy/wavelength distribution  0 
target_index  1  relative index of component to focus at, e.g. next is +1 this is used to compute 'dist' automatically.  +1 
Name  Unit  Description  Default 

pmul  
square  
srcArea 
Source_simple.comp
.
[ Identification  Description  Input parameters  Output parameters  Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri Jul 19 12:01:32 2019