Drift kinetic electrostatic simulations of the edge localized mode heat pulse

Geyko, V. I.; Joseph, I.; Dorf, M. A.; Ghosh, D.; Dorr, M. R.

doi:10.1063/5.0230913

Title: Drift kinetic electrostatic simulations of the edge localized mode heat pulse

Journal Article · 11 December 2024 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0230913 · OSTI ID:2480999

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Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

In the present work, electrostatic drift kinetic simulations of parallel plasma transport within the tokamak scrape-off layer (SOL) are conducted using the COGENT code. The SOL configuration is represented in one-dimensional slab geometry, incorporating a heat source localized in the midplane. The heat source parameters correspond to those characterizing edge-localized modes observed in the Joint European Torus (JET) tokamak. The numerical model includes kinetic treatment of both ions and electrons, a simplified model for the gyrokinetic Poisson equation that allows one to step over short time scales associated with fast electrostatic shear Alfvèn waves, and the logical sheath boundary condition (LSBC) that enforces global system quasineutrality. A third-order accurate LSBC is derived to be consistent with the third-order accurate upwind advection scheme utilized in the code, and it was shown to noticeably impact the simulation results, especially parallel heat flux at the target plate. The findings of this study are in agreement with results from preceding fluid and kinetic simulations.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 2480999

Report Number(s):: LLNL-JRNL--865849; 1100179

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 31; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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