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McStas: ESS_BIFROST_shielding Instrument at ESS

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

The ESS_BIFROST_shielding Instrument

Model of the ESS BIFROST instrument that illustrates the use of the "shielding-logger" components

Identification

  • Site: ESS
  • Author: Rodion Kolevatov, IFE
  • Origin: IFE
  • Date: 2020/01
  • Version:(Unknown)

Description

This model of the ESS BIFROST instrument illustrates the use of the "shielding-logger"
components, as described in the publications https://doi.org/10.3233/JNR-190123, 
https://doi.org/10.3233/JNR-180088 and https://doi.org/10.1016/j.nima.2018.12.069.

An important note from the author:
Please note that the included Shielding- and Dose- calculators will only give sensible for guides with 
borosilicate glass substrate. If the substrate is, e.g. copper, the dose rates from neutrons transmitted 
through the coating and captured in the substrate will overshoot the coating contribution significantly, 
so that shielding has to be enforced by few tens of centimeters of concrete. 

Example: ESS_BIFROST_shielding.instr WaveMin=1

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
WaveMin AA Minimum wavelength from moderator 1
WaveMax AA Maximum wavelength from moderator 10
E_0 meV Lowest energy in wavelength band - used for chopper settings 4.0
L_0 AA Alternative: highest wavelength in wavelength band - used for chopper settings 0
chopPulseOpening s Opening time of pulse shapping chopper 0.004
DivSlit0_width m Opening of Divergence Slit nr 0 0.1
DivSlit1_width m Opening of Divergence Slit nr 1 0.1
DivSlit2_width m Opening of Divergence Slit nr 2 0.1
DivSlit3_width m Opening of Divergence Slit nr 3 0.1
Npulse 1 Number of pulses to produce at the source 1
print 1 Bolean flag to print values of interest for debugging. mcdisplay does not work when this is set to 1 0
makeVirtualSource 1 Bolean flag to save all neutrons to virtual source file 0
printMValues 1 Bolean flag to indicate that M-values should be printed 0
power MW ESS accelerator power 5.0
BWopen deg Bandwidth-chopper opening angle - unused 161

Links


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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri Sep 11 06:49:10 2020


Last Modified: Friday, 11-Sep-2020 08:49:10 CEST
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