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McStas: Test_PowderN_Res Instrument at Test_samples

[ Identification | Description | Input parameters | Output 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: Test_samples
  • Author: Peter Willendrup
  • Origin: DTU
  • Date: 20160309
  • Version: 2.3

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: mcrun Test_PowderNRes  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.
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

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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Wed Apr 19 10:57:33 2017


Last Modified: Wednesday, 19-Apr-2017 12:57:33 CEST
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