McStas logo McStas - A neutron ray-trace simulation package ILL; PSI; ESS Niels Bohr Institute DTU Physics NEXMAP

McStas

About McStas
 Conditions of use
 Authors/Contacts
 Project funding
 Screenshots

Download
 Components
 Linux Install (deb/rpm)
 Mac OS X Install
 Unix Install (src code)
 Windows Install
 Other Downloads (share)

Mailing list

Search web/mailinglist

Documentation
 McStas manual
 FAQ
 Known problems
 Publications
 C Compilers
 Other
 Tools
 Tutorial

Workshops/conferences

Developments

Links

Report bugs

Git

McStas Ubuntu live-dvd


McStas: Saphire_Filter Component

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

The Saphire_Filter Component

Saphire filter at 300K

Identification

  • Author: Jonas Okkels Birk (based upon Filteg_Graphite by Thomas C Hansen (2000))
  • Origin: PSI
  • Date: 6 December 2006
  • Version: 1.1.1.1

Description


This saphire filter, defined by two identical rectangular opening apertures,
is based upon an absorption function absorp=exp(L*A+C*(exp(-(B/L^2+D/L^4))))
decribed by Freund (1983) Nucl. Instrum. Methods, A278, 379-401. The
defaultvalues is for Saphire at 300K as found by measurement by (Mildner &
Lamaze (1998) J. Appl. Cryst. 31,835-840
( http://journals.iucr.org/j/issues/1998/06/00/hw0070/hw0070bdy.html#BB4)). It
is possble to ajust the formular to other materials or temperatures by typing in
other parameters.
The transmission in saphire is only lightly demependt on temperature, but
The formular is only cheked at wavelenths between 0.5 and 14 AA (0.4 meV 0.3
eV).
The filter is for example used in the Eiger beamline at PSI to cut of high
energies. 



WARNING: This is a contributed Component.

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
xmin m Lower x bound -0.16
xmax m Upper x bound 0.16
ymin m Lower y bound -0.16
ymax m Upper y bound 0.16
len m Thickness of filter 0.1
A 0.8116
B 0.1618
C 21.24
D 0.1291

Links


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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Wed Apr 19 10:57:33 2017


Last Modified: Wednesday, 19-Apr-2017 12:57:33 CEST
Search website mailinglist archive GitHub repos