Validation of realistic Monte Carlo plasma gamma-ray source on JET discharges

Žohar, A.; Nocente, M.; Kos, B.; Štancar, Ž.; Rebai, M.; Rigamonti, D.; Craciunescu, T.; Gorelenkova, M.; Kazakov, Ye O.; Kiptily, V. G.; Snoj, L.; Tardocchi, M.; Lengar, I.

doi:10.1088/1741-4326/ac50c0

Title: Validation of realistic Monte Carlo plasma gamma-ray source on JET discharges

Journal Article · Mon Apr 04 00:00:00 EDT 2022 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/ac50c0· OSTI ID:1885796

Žohar, A. ^[1];

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^[4]; Rebai, M. ^[5];

^[5]; Craciunescu, T. ^[6];

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^[1]; Tardocchi, M. ^[5]; Lengar, I. ^[3]

Jozef Stefan Inst. (IJS), Ljubljana (Slovenia); Univ. of Ljubljana (Slovenia)
Istituto per la Scienza e Tecnologia dei Plasmi (ISTP-CNR), Milan (Italy); Univ. di Milano-Bicocca (Italy)
Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
Jozef Stefan Inst. (IJS), Ljubljana (Slovenia); United Kingdom Atomic Energy Authority (UKAEA), Abingdon (United Kingdom)
Istituto per la Scienza e Tecnologia dei Plasmi (ISTP-CNR), Milan (Italy)
National Institute for Lasers, Plasma and Radiation Physics (Romania)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Royal Military Academy (ERM) (Belgium). Laboratory for Plasma Physics (LPP)
United Kingdom Atomic Energy Authority (UKAEA), Abingdon (United Kingdom)

A novel modelling methodology has been developed for the creation of a realistic plasma gamma-ray source for Monte Carlo transport simulations in the tokamak JET. The methodology couples the TRANSP code for plasma transport calculations with the MCNP Monte Carlo particle transport code, thus connecting plasma physics with gamma-ray transport. Here, we present the validation of the developed source methodology by comparing calculated gamma-ray spectra with measurements performed at JET. The validation focuses on gamma-ray spectra measured by the tangential gamma-ray spectrometer during two JET three ion RF scenario discharges, performed in the JET 2019 deuterium experimental campaign. For validation the calculated plasma gamma-ray spectrum was combined with the neutron induced prompt gamma-ray background, originating in the vacuum vessel, and scaled to absolute values calculating the total number of plasma gamma-ray and neutron emitting reactions. The comparison between calculated and measured gamma-ray spectra shows good agreement with the shape of the calculated gamma-ray spectra matching that of measurements for both studied discharges. Moreover, the calculated absolute values of the gamma-ray spectra were of the same order of magnitude at the position of the gamma-ray detector located at the end of a long line-of-sight in a biological shield. Finally, the comparison has validated the developed plasma gamma-ray source methodology for MCNP photon transport calculations at JET. The validation provides a basis for the developed plasma gamma-ray source to be used as a support for the development of future tokamaks such as DEMO.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; European Atomic Energy Community; Slovenian Ministry of Education

Contributing Organization:: JET Contributors

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1885796

Journal Information:: Nuclear Fusion, Vol. 62, Issue 6; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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