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

The ISIS_OSIRIS Instrument

A simulation of the indirect TOF geometry part of the OSIRIS instrument.

Identification

• Site: ISIS
• Author: Peter Christiansen with input from Mark Telling, updates by P Willendrup
• Origin: DTU Fysik, RISOE and ISIS
• Date: November 2015

Description

If LAMBDA = 0, the choppers are disabled, else the choppers are
centered to chop around this wavelength and the source is studied in the
interval LAMBDA +- DLAMBDA.

IMPORTANT NOTES:

1) Monchromator is not realistic in the sense that it does NOT
smear the beam out according to the mosaicity, only does the N=1
reflection, and the d-spread is handled in a simple way

2) The instrument is not validated or certified by ISIS. Is only put in
McStas for completeness.

Examples

(Test cases in bold)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
LAMBDA	AA	Mean wavelength at source	6.66
DLAMBDA	AA	Wavelength spread at source	0.1
GUIDEREFLECTIVITY	1	R0-reflectivity of guide	1.0

Links

• Source code for ISIS_OSIRIS.instr.

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

Generated for mcstas 3.8.4

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Last Modified: Friday, 11-Sep-2026 15:00:09 CEST