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

The Source_multi_surfaces Component

Rectangular neutron source with subareas - using wavelength spectra reading from files

Identification

Description

This 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 source surface can be divided in subareas (maximum 7 in one dimension). 
For each subarea a discret spectrum must be loaded given by its corresponding
file. The name of the files are saved in one file and will be called with the
parameter "names".
In fact the routine first reads the spectrum from files (up to 49) and it 
selects randomly a subarea. Secondly it generates a neutron with an random
energy, selected from the spectrum corresponding to the subsurface chosen, and
with a random direction of propagation within the target.
ATTENTION 1:  the files must be located in the working directory where also
		the instrument file is located
ATTENTION 2:  the wavelenght distribution (or binning) must be uniform 


Usage example:
  Source_multi_surfaces(h=0.16,w=0.09,dist=1.18,xw=0.08,yh=0.15,xdim=4,ydim=4,
                        Lmin=0.01,Lmax=10.0,names="files_name.dat")

WARNING: This is a contributed Component.

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
names str Name of the file containing a list of the spectra file names eg. for a 3x2 (x,y) division : spec1_1.dat spec1_2.dat spec1_3.dat spec2_1.dat spec2_2.dat spec2_3.dat(RETURN-key)  
h m Source y-height  
w m Source x-width  
dist m Distance to target along z axis  
xw m Width(x) of target  
yh m Height(y) of target  
xdim int Number of subareas in the x direction  
ydim int Number of subareas in the y direction  
Emin eV Minimum energy of neutrons 0.0
Emax eV Maximum energy of neutrons 0.0
Lmin AA Minimum wavelength of neutrons 0.0
Lmax AA Maximum wavelength of neutrons 0.0

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> / Thu Feb 10 12:52:12 2011