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McStas: Test_PowderN_Res

[ Identification | Description | 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

Input parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault
Lambda0AACentral wavelength of the source2.5667
dLambdaAAWidth of wavelength band from the source0.01
radiusmRadius of cylindrical powder sample0.01
TTdegTwo-theta (scattering angle) of small banana detectors72
D_PHIdegd_phi focusing around detector "plane" in degrees6
SPLITS1SPLIT statistics booster at sample position117
DistancemDistance between source and sample30
sig_absbarnsAbsorption cross-section in the sample1e-9

Links

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

[ Identification | Description | Input parameters | Links ]

Generated on 2023-09-19 20:01:36


Last Modified: Wednesday, 03-Jan-2024 19:59:10 CET
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