Numerical studies on saturated kink and sawtooth induced fast ion transport in JET ITER-like plasmas

Bonofiglo, Phillip J.; Podesta, Mario; Vallar, Matteo; Gorelenkov, Nikolai N.; Kiptily, Vasily; White, Roscoe B.; Giroud, Carine; Brezinsek, Sebastijan

doi:10.1088/1741-4326/ac888c

Numerical studies on saturated kink and sawtooth induced fast ion transport in JET ITER-like plasmas

Journal Article · Thu Sep 29 00:00:00 EDT 2022 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/ac888c· OSTI ID:1887985

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Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)
Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
Forschungszentrum Juelich (Germany)

Here, this presentation examines the energetic particle transport induced by saturated kink modes and sawtooth crashes in JET deuterium plasmas. It is known that kink mode-resonant transport and phase-space redistribution from sawtooth crashes can drive strong fast ion transport with dependencies on particle pitch and energy. Measurements with JET's Faraday cup fast ion loss detector array have shown that the internal kink growth phase preceding sawtooth crashes produces substantial fast ion losses. This report will numerically investigate the dominant energetic particle transport mechanism with a detailed examination of the fast ion phase-space dependencies, resonances, orbit topology changes, induced losses, and redistribution associated with the long-lived, resonant, kink mode and non-resonant sawtooth crash. The ORBIT-kick model forms the basis of the transport studies with realistic fast ion distributions produced from TRANSP. A recently created reduced model for sawtooth induced transport is used while the saturated kink modes are modeled with ideal MHD codes. The simulations were further validated against experiment with a newly developed synthetic Faraday cup fast ion loss detector in addition to scintillator probe and neutron measurements.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); European Union (EU); Swiss National Science Foundation (SNSF)

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1887985

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 11 Vol. 62; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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