[ 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.

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 | Links ]