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

The NCrystal_PowderN_multiphase Instrument

Example instrument for PowderN with a (multiphase) NCrystal material

Identification

• Site: NCrystal
• Author: T. Kittelmann
• Origin: ESS
• Date: 2026

Description

Simple powder diffractometer, with a PowderN sample whose reflections are
taken from a two-phase NCrystal material, with the cfg-string built from the
instrument parameters, e.g.

"phases<0.3*stdlib::Al_sg225.ncmat&0.7*stdlib::Cu_sg225.ncmat>"

for the default parameters (the fractions are volume fractions).

Examples

(Test cases in bold)

• Test: frac1=0.3 Detector: banana_I=6.03
• Test: frac1=1 Detector: banana_I=1.28
• Test: phase1="stdlib::Al_sg225.ncmat;density=0.5x" frac1=1 Detector: banana_I=0.649
• Test: phase2="stdlib::Epoxy_Araldite506_C18H20O3.ncmat" frac1=0.5 Detector: banana_I=22.3

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
phase1	string	NCrystal cfg-string of the first phase.	"stdlib::Al_sg225.ncmat"
phase2	string	NCrystal cfg-string of the second phase.	"stdlib::Cu_sg225.ncmat"
frac1	1	Volume fraction of the first phase (the second phase gets 1-frac1). With frac1=1 (or 0), only the first (or second) phase is used.	0.3
lambda	AA	Mean wavelength of the incident neutrons.	2.0

Links

• Source code for NCrystal_PowderN_multiphase.instr.
• https://github.com/mctools/ncrystal/wiki/

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

Generated for mcstas 3.9.2

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Last Modified: Tuesday, 06-Oct-2026 21:19:12 CEST