Synthetic neutron camera and spectrometer in JET based on AFSI-ASCOT simulations

Paula Sirén, Jari Varje, Henri Weisen, Tuomas Koskela, J.E.T. Contributors

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

The ASCOT Fusion Source Integrator (AFSI) has been used to calculate neutron production rates and spectra corresponding to the JET 19-channel neutron camera (KN3) and the time-of-flight spectrometer (TOFOR) as ideal diagnostics, without detector-related effects. AFSI calculates fusion product distributions in 4D, based on Monte Carlo integration from arbitrary reactant distribution functions. The distribution functions were calculated by the ASCOT Monte Carlo particle orbit following code for thermal, NBI and ICRH particle reactions. Fusion cross-sections were defined based on the Bosch-Hale model and both DD and DT reactions have been included. Neutrons generated by AFSI-ASCOT simulations have already been applied as a neutron source of the Serpent neutron transport code in ITER studies. Additionally, AFSI has been selected to be a main tool as the fusion product generator in the complete analysis calculation chain: ASCOT - AFSI - SERPENT (neutron and gamma transport Monte Carlo code) - APROS (system and power plant modelling code), which encompasses the plasma as an energy source, heat deposition in plant structures as well as cooling and balance-of-plant in DEMO applications and other reactor relevant analyses. This conference paper presents the first results and validation of the AFSI DD fusion model for different auxiliary heating scenarios (NBI, ICRH) with very different fast particle distribution functions. Both calculated quantities (production rates and spectra) have been compared with experimental data from KN3 and synthetic spectrometer data from ControlRoom code. No unexplained differences have been observed. In future work, AFSI will be extended for synthetic gamma diagnostics and additionally, AFSI will be used as part of the neutron transport calculation chain to model real diagnostics instead of ideal synthetic diagnostics for quantitative benchmarking.
Original languageEnglish
Article numberC09010
JournalJournal of Instrumentation
Volume12
Issue number9
DOIs
Publication statusPublished - 8 Sep 2017
MoE publication typeA1 Journal article-refereed

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integrators
Neutron
Spectrometer
Spectrometers
Fusion
Neutrons
Fusion reactions
fusion
Camera
Cameras
cameras
spectrometers
neutrons
Simulation
simulation
Diagnostics
Distribution functions
Neutron Transport
Distribution Function
distribution functions

Keywords

  • analysis and statistical methods
  • nuclear instruments and methods for hot plasma diagnostics
  • simulation methods and programs

Cite this

Sirén, Paula ; Varje, Jari ; Weisen, Henri ; Koskela, Tuomas ; Contributors, J.E.T. / Synthetic neutron camera and spectrometer in JET based on AFSI-ASCOT simulations. In: Journal of Instrumentation. 2017 ; Vol. 12, No. 9.
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abstract = "The ASCOT Fusion Source Integrator (AFSI) has been used to calculate neutron production rates and spectra corresponding to the JET 19-channel neutron camera (KN3) and the time-of-flight spectrometer (TOFOR) as ideal diagnostics, without detector-related effects. AFSI calculates fusion product distributions in 4D, based on Monte Carlo integration from arbitrary reactant distribution functions. The distribution functions were calculated by the ASCOT Monte Carlo particle orbit following code for thermal, NBI and ICRH particle reactions. Fusion cross-sections were defined based on the Bosch-Hale model and both DD and DT reactions have been included. Neutrons generated by AFSI-ASCOT simulations have already been applied as a neutron source of the Serpent neutron transport code in ITER studies. Additionally, AFSI has been selected to be a main tool as the fusion product generator in the complete analysis calculation chain: ASCOT - AFSI - SERPENT (neutron and gamma transport Monte Carlo code) - APROS (system and power plant modelling code), which encompasses the plasma as an energy source, heat deposition in plant structures as well as cooling and balance-of-plant in DEMO applications and other reactor relevant analyses. This conference paper presents the first results and validation of the AFSI DD fusion model for different auxiliary heating scenarios (NBI, ICRH) with very different fast particle distribution functions. Both calculated quantities (production rates and spectra) have been compared with experimental data from KN3 and synthetic spectrometer data from ControlRoom code. No unexplained differences have been observed. In future work, AFSI will be extended for synthetic gamma diagnostics and additionally, AFSI will be used as part of the neutron transport calculation chain to model real diagnostics instead of ideal synthetic diagnostics for quantitative benchmarking.",
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Synthetic neutron camera and spectrometer in JET based on AFSI-ASCOT simulations. / Sirén, Paula; Varje, Jari; Weisen, Henri; Koskela, Tuomas; Contributors, J.E.T.

In: Journal of Instrumentation, Vol. 12, No. 9, C09010, 08.09.2017.

Research output: Contribution to journalArticleScientificpeer-review

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