Simulating energetic particle losses in JET plasmas with a reverse integration biasing scheme

Bonofiglo, P. J.; Podestà, M.; White, R. B.; Kiptily, V.; Goloborodko, V.; Gorelenkov, N. N.; Vallar, M.; Cecil, F. E.; Giroud, C.; Brezinsek, S.

doi:10.1088/1741-4326/ac3f4a

Title: Simulating energetic particle losses in JET plasmas with a reverse integration biasing scheme

Journal Article · 04 January 2022 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/ac3f4a · OSTI ID:1856190

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^[4]; Cecil, F. E. ^[5]; Giroud, C. ^[2];

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Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Culham Science Centre, Abingdon (United Kingdom)
Kyiv Inst. for Nuclear Research (Ukraine)
Ecole Polytechnique Federale Lausanne (Switzerland)
Colorado School of Mines, Golden, CO (United States)
Institute of Energy and Climate Research, Julich (Germany)

We report that an integrated energetic particle transport model has been constructed in JET plasmas constrained by experimental fast ion loss measurements. The model incorporates a synthetic fast ion loss detector identical to JET’s thin-foil Faraday cup fast ion loss detector array. The loss model combines analyses from the TRANSP and ORBIT-kick codes with enhanced features for producing the synthetic diagnostic. Extensions to the ORBIT code framework allow a full-orbit representation within the vacuum region that can map particles directly to an installed detector geometry. Since synthetic fast ion loss detectors are plagued by weak loss statistics, a novel reverse integration biasing scheme has been implemented to boost computational efficiency. The model is validated against experimental loss measurements induced by long-lived kink modes and is found to be in good agreement. This confirms the development of a fully integrated transport/loss model which can be quantitatively verified against experiment allowing for future validation and predictive studies. The model is particularly useful for more complicated plasma scenarios that involve multiple fast ion species such as JET’s 2021 DT-campaign.

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

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); Euratom research and training programme

Contributing Organization:: JET Contributors

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1856190

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 2 Vol. 62; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Simulating energetic particle losses in JET plasmas with a reverse integration biasing scheme

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