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

The HET Instrument

HET: High Energy Transfer Chopper Spectrometer

Identification

• Site: ISIS
• Author: Dickon Champion
• Origin: ISIS (UK)
• Date: 22nd Jan 2004.
• Version: 1.7

Description

This instrument is a simple model of the HET spectrometer at the ISIS neutron
facility. The input arguments are hardwired so that the Fermi chopper position
is 10 metres from the moderator. This instrument uses the FC module written by
Andrew Garret which comes with no guarantees as to its accuracy in modelling the
Fermi Chopper.


Example: mcrun HETfull.instr E_0=443.0,E_1=470.0,nu_chop=600.0, type=2

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
E_0	meV	lowest energy sampled	443.0
E_1	meV	highest energy sampled	470.0
nu_chop	Hz	frequency of chopper rotation	600.0
type	sloppy chopper = 1, B chopper = 2	chopper package selected	2

Links

• Source code for HET.instr.

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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri May 11 08:41:09 2012

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Last Modified: Friday, 11-May-2012 10:41:09 CEST