The `Sqq_w_monitor` Component

Monitor outputting a series of energy-planes in a subset of reciprocal space, spanned by scattering vectors qa(x,z) and qb(x,z) in the component x-z plane.

Identification

Site:
Author: Peter Willendrup
Origin: DTU
Date: June-July, 2018

Description

Cylindrical monitor on the x-z plane outputting a series of energy-planes in a subset of reciprocal
space, spanned by scattering vectors qa(x,z) and qb(x,z).

The radius and yheight parameters are not used for propagation, but only to define the outgoing divergence
limit considered when estimating k_f

The assumption is that the "current" neutron represents the final state, whereas the incoming state
is found by restoring the neutron state "index" components earlier.

Example: Sqq_w_monitor(filename="output",radius=1, yheight=0.05, Emin=0,Emax=5,nE=11,nqa=100,nqb=100,qamin=1,qamax=10,qbmin=1qbmax=10, vix="vix", viy="viy", viz="viz")
AT (0,0,0) RELATIVE sample

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
radius	m	Cylinder radius	1
yheight	m	Cylinder height	0.05
qax	1	x-component of 1st q-vector	1
qaz	1	z-component of 1st q-vector	0
qbx	1	x-component of 2nd q-vector	0
qbz	1	z-component of 2nd q-vector	1
qamin	AA^-1	Defines interval (qamin,qamax) where monitor measures in nqa bins	0
qamax	AA^-1	Defines interval (qamin,qamax) where monitor measures in nqa bins	2
qbmin	AA^-1	Defines interval (qbmin,qbmax) where monitor measures in nqb bins	0
qbmax	AA^-1	Defines interval (qbmin,qbmax) where monitor measures in nqb bins	2
Emin	meV	Defines the energy-transfer [Emin,Emax] window to monitor in nE bins	0
Emax	meV	Defines the energy-transfer [Emax,Emax] window to monitor in nE bins	5
nqa	int	Number of bins along qa direction	90
nqb	int	Number of bins along qb direction	90
nE	int	Number of energy slices	10
filename	string	Base filename to use, nE+1 files will be output	0
nowritefile	1	If set, monitor will skip writing to disk	0
nosum	1	If set, monitor will skip writing the energy-summed array to disk	0
vix	string	Points to instrument-level USERVAR for reading an earlier x-velocity	""
viy	string	Points to instrument-level USERVAR for reading an earlier y-velocity	""
viz	string	Points to instrument-level USERVAR for reading an earlier z-velocity	""

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

The Sqq_w_monitor Component

Identification

Description

Input parameters

Links

The `Sqq_w_monitor` Component