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

The Test_PowderN_Res Instrument

Idealized powder diffractometer, to illustrate the difference between 'banana,theta' and 'banana,divergence' in Monitor_nD.

Identification

• Site: Tests_samples
• Author: Peter Willendrup
• Origin: DTU
• Date: 20160309

Description

Idealized powder diffractometer, to illustrate the difference between 'banana,theta' and 'banana,divergence' in Monitor_nD. Includes a Na2Ca3Al2F14 powder sample.

The beam from the source is very low-divergent, to allow studying effects at the sample "only".

By default, absorption in the sample is effectively suppressed.

Example: Lambda0=2.5667 dLambda=0.01 radius=0.001,0.021 TT=71.8 D_PHI=6 SPLITS=117 Distance=30 sig_abs=1e-09 -N21

Examples

(Test cases in bold)

• Test: Lambda0=2.5667 dLambda=0.01 radius=0.01 TT=71.8 D_PHI=6 SPLITS=117 Distance=30 sig_abs=1e-09 Detector: DetectorSmall_I=288.57

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
Lambda0	AA	Central wavelength of the source	2.5667
dLambda	AA	Width of wavelength band from the source	0.01
radius	m	Radius of cylindrical powder sample	0.01
TT	deg	Two-theta (scattering angle) of small banana detectors	72
D_PHI	deg	d_phi focusing around detector "plane" in degrees	6
SPLITS	1	SPLIT statistics booster at sample position	117
Distance	m	Distance between source and sample	30
sig_abs	barns	Absorption cross-section in the sample	1e-9

Links

• Source code for Test_PowderN_Res.instr.
• A reference/HTML link for more information

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

Generated for mcstas 3.9.2

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Last Modified: Sunday, 11-Oct-2026 15:14:09 CEST