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

The Source_flat component

Neutron source with flat energy spectrum and arbitrary flux

Identification

• Author: KL
• Origin: McStas release
• Date: October 30, 1997
• Version: 1.6
• Modification history:
  • KL, KN, October 5, 1998

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 energy is
uniformly distrubuted between E0-dE and E0+dE.

ToDo: More flexible specification of E distribution.

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
E0	meV	Mean energy of neutrons.
dE	meV	Energy spread of neutrons.

Output parameters

Name	Unit	Description	Default
hdiv
vdiv
p_in

Links

• Source code for Source_flat.comp.
• Test results (not up-to-date).

---

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

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

---

Last Modified: Tuesday, 22-Jun-2004 14:04:09 CEST