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[ Identification | Description | Input 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
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 |
| 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
- Source code for
ESS_BIFROST_shielding.instr. - See 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.
[ Identification | Description | Input parameters | Links ]
Generated on 2025-05-08 13:31:31
