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McStas: SNS_ARCS Instrument at SNS

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

The SNS_ARCS Instrument

Model of the ARCS spectrometer from SNS.

Identification

  • Site: SNS
  • Author: G. Granroth
  • Origin: SNS
  • Date: Nov 2014
  • Version:(Unknown)

Description

When using this ARCS instrument model, please reference
  • Granroth, G. E. and Abernathy, D. L., "Performance Comparisons of Four Direct Geometry Spectrometers Planned for Spallation Neutron Source", Proceedings of ICANS-XVI, 289 (2003).
  • D. L. Abernathy, M. B. Stone, M. J. Loguillo, M. S. Lucas, O. Delaire, X.Tang, J. Y. Y. Lin, and B. Fultz,"Design and operation of the wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source", Review of Scientific Instruments, 83 , 015114 (2012)

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
Fermi_nu Hz Frequency of the Fermi chopper 420
T0_nu Hz Frequency of the T0 chopper 90
nrad m Radius of the Fermi chopper blades 0.58
nchans 1 Number of channels in the Fermi chopper 40
Edes meV Desired/target energy 50
Et meV Energy transfer of the Spot_sample 25
ttheta deg Scattering angle of the Spot_sample 25
T0_off 0
sxmin m Sample slit horz min value -0.04
sxmax m Sample slit horz max value 0.04
symin m Sample slit vert min value -0.04
symax m Sample slit vert max value 0.04
run_num unused at present [1] Virtual source run number 1

Links

  • Source code for SNS_ARCS.instr.

  • Granroth, G. E. and Abernathy, D. L., "Performance Comparisons of Four Direct Geometry Spectrometers Planned for Spallation Neutron Source", Proceedings of ICANS-XVI, 289 (2003).
    D. L. Abernathy, M. B. Stone, M. J. Loguillo, M. S. Lucas, O. Delaire, X.Tang, J. Y. Y. Lin, and B. Fultz,"Design and operation of the wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source", Review of Scientific Instruments, 83 , 015114 (2012)

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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Mon Jun 26 12:27:17 2017


Last Modified: Monday, 26-Jun-2017 14:27:17 CEST
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