[ Identification | Description | Input parameters | Links ]

The `Template_Johann_spec` Instrument

Template instrument for a curved crystal Johann-spectrometer

Identification

Site: Templates
Author: Erik B Knudsen (erkn@fysik.dtu.dk)
Origin: DTU Physics
Date: Jan 2019

Description

This is a template instrument for a Johann spectrometer intended
for easy inclusion in other "real" instrument simulations.

The source is a divergent line like source which illumnates the
full crystal. The analyzer crystal itself is modelled as a single
bent crystal curved to a primary radius of 2*Rowland-radius.

To include a Johann spectrometer in an instrument the sample should be put where
source is in this template. and otherwis copy-paste.

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
L	m	Length of the analyzer crystal.	0.2
r_Row	m	Radius of the Rowland circle. Also governs the crystal curvature (2*r_Row).	0.5
theta_inc	deg	Angle of incidence at the crystal centre	78.5
dtheta_s	deg	Rotation angle of the Source. To allow scanning with a pencil beam across the crystal face.	0
phi_s	deg	Opening angle of source. If 0 it is set to cover the full crystal (and some).	0

The Template_Johann_spec Instrument

Identification

Description

Input parameters

Links

The `Template_Johann_spec` Instrument