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

The Test_filters Instrument

Test instrument for McStas components as Be-filters

Identification

• Site: PSI
• Author: Peter Willendrup
• Origin: ESS
• Date: March 2026

Description

Test instrument for cross-checking McStas components for use as Be-filters.
Where applicable, the temperature is set to 80K (corresponding to the header
of the Be.trm file used in Filter_gen

Examples

(Test cases in bold)

• Test: Filter=0 Detector: L_out_I=2183.87
• Test: Filter=1 T=80 Detector: L_out_I=1875.02
• Test: Filter=2 Detector: L_out_I=1868.5
• Test: Filter=3 Detector: L_out_I=2011.26

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
Lmin	AA	Lowest wavelength from source	0.5
Lmax	AA	Highest wavelength from source	10
Filter	1	Choice of filter 0: Filter_gen, 1: NCrystal, 2: PowderN, 3: Isotropic_Sqw	0
nL	1	Number of wavelength bins in [Lmin Lmax] interval	101
zdepth	m	Depth of Be-filter	0.15
T	K	Filter temperature (NCrystal only)	80

Links

• Source code for Test_filters.instr.
• Acta Cryst. (1978). A34, 61-65
• Rev. Sci. Instrum. 59, 380-381 (1988)
• Test instrument written by P Willendrup ESS, March 2026

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

Generated for mcstas 3.10.2

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Last Modified: Tue Nov 3 18:52:15 2026