The `Test_FluoPowder` Instrument

Unit-test instrument for the FluoPowder sample component.

Identification

Site: Tests_samples
Author: Emmanuel Farhi (emmanuel.farhi.synchrotron-soleil.fr)
Origin: Synchrotron Soleil
Date: 2025

Description

Simply a model source illuminating a fluo/powder/sx sample.
The default sample itself is an LaB6-powder.
The idea is to compare the fluorescence and diffraction patterns:
- index=1: use PowderN              (no fluorescence)
- index=2: use Single_crystal       (no fluorescence, slower, powder mode)
- index=3: use FluoPowder           (exact)
- index=4: use Fluorescence         (no diffraction)
- index=5: use Fluorescence+PowderN (exact)

Examples

(Test cases in bold)

Test: Test_FluoPowder.instr E0=15 index=1 Detector: Sph_mon_pow_I=1.77806e-19
Example: Test_FluoPowder.instr E0=15 index=2 Detector: Sph_mon_pow_I=1.99226e-19
(Unittest disabled for Single_crystal SX, fails consistently on Windows, possibly cif2hkl UB)
Test: Test_FluoPowder.instr E0=15 index=3 Detector: Sph_mon_pow_I=1.77226e-19
Test: Test_FluoPowder.instr E0=15 index=4 Detector: Sph_mon_flu_I=6.18074e-19
Example: Test_FluoPowder.instr E0=15 index=5 Detector: Sph_mon_pow_I=1.77403e-19
(Fluorescence+PowderN GROUP is unstable on GPU, disable index=5 test for now)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
E0	keV	Source mean energy of xrays.	15
dE	keV	Source energy half spread of x-rays.	0.05
L1	m	Source-sample distance.	10
material	str	Material structure/composition as formula or LAU/CIF format.	"LaB6.cif"
index	1	Index of the sample component to use. 1=PowderN, 2=Single_crystal (much slower), 3=FluoPowder, 4=Fluorescence, 5=Fluorescence+PowderN in a GROUP (slower)	3
delta_d_d	1	Lattice spacing variance, gaussian RMS	3e-4

McXtrace - An X-ray ray-trace simulation package

The Test_FluoPowder Instrument

Identification

Description

Examples

Input parameters

Links

The `Test_FluoPowder` Instrument