15.5  The Virtual_mcnp_output McStas Component

Detector-like component that writes neutron state parameters into a ’virtual source’ neutron file with MCNP/PTRAC format.

Identification

• Author: <a href="mailto hennanec@ensimag.fr">Chama Hennane</a> and E. Farhi

• Origin: <a href="http://www.ill.fr/">ILL</a>

• Date: July 7th, 2006

Description

Detector-like component writing neutron state parameters to a virtual source neutron file with MCNP/PTRAC format. The component geometry is the full plane, and saves the neutron state as it exits from the previous component. Format is the one used by MCNP 5 files :

position_X position_Y position_Z dir_X dir_Y dir_Z energy weight time

energy is in Mega eV positions are in cm and the direction vector is normalized to 1.

%BUGS This component will NOT work with parallel execution (MPI).

EXAMPLE: To create a file collecting all neutron states with MCNP5 format COMPONENT fichier_sortie = Virtual_mcnp_output( filename = "exit_guide_result.dat") at the position where will be the Virtual_mcnp_input.

Input parameters

Parameters in boldface are required; the others are optional.

Links

• Component source code found in file Virtual_mcnp_output.comp.

• MCNP

• MCNP – A General Monte Carlo N-Particle Transport Code, Version 5, Volume II: User’s Guide, p177