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

The NCrystal_Single_crystal Instrument

Example instrument for Single_crystal with an NCrystal material

Identification

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

Description

A white beam hits a Single_crystal sample, whose crystal structure is taken
from an NCrystal material, and the scattered neutrons are recorded on a
spherical detector (Laue pattern) and on a banana detector. Optionally, a
non-crystalline phase is added with the parameters extra_phase and
extra_frac, e.g. giving the NCrystal cfg-string

"phases<0.9*stdlib::Al_sg225.ncmat&0.1*stdlib::Epoxy_Araldite506_C18H20O3.ncmat>"

for extra_frac=0.1.

Examples

(Test cases in bold)

• Test: omega=0 Detector: laue_I=1.12
• Test: crystal="stdlib::Al_sg225.ncmat;density=0.5x" Detector: laue_I=0.653
• Test: crystal="stdlib::Ge_sg227.ncmat" omega=10 Detector: laue_I=4.87
• Test: extra_frac=0.1 Detector: laue_I=9.46

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
crystal	string	NCrystal cfg-string of the crystal.	"stdlib::Al_sg225.ncmat"
extra_phase	string	NCrystal cfg-string of an additional non-crystalline phase (only used if extra_frac>0).	"stdlib::Epoxy_Araldite506_C18H20O3.ncmat"
extra_frac	1	Volume fraction of the additional phase.	0
omega	deg	Rotation of the crystal around the vertical axis.	0
mosaic	arcmin	Isotropic mosaic of the crystal.	30

Links

• Source code for NCrystal_Single_crystal.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