Modeling of plasma transport during edge-localized mode in tokamak using a kinetic Vlasov-Poisson code
Abstract
A kinetic parallel transport code KOBRA based on a finite-volume method is developed to study edge localized mode (ELM) plasma transport from the mid-plane to divertor targets. The large scale separation between the Debye length (~cm) and the connection length (~10-20 m) leads to prohibitive computational cost in full 6D simulations. To alleviate this, an adaptive-mesh refinement (AMR) strategy is employed. Comparisons with uniform-grid simulations show that AMR accurately reproduces the characteristic ELM dynamics, including the rapid rise and slow decay of divertor fluxes, as well as the early-time peak induced by fast electrons. Analysis of the electron distribution and self-consistent electric field reveals that AMR efficiency is closely linked to phase-space evolution. Overall, AMR achieves comparable physical accuracy while reducing memory usage by 30-40% and accelerating computations by up to a factor of two, demonstrating its effectiveness for high-dimensional kinetic ELM simulations.
Versions
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BibTeX
@misc{wang2026modeling,
title = {{Modeling of plasma transport during edge-localized mode in tokamak using a kinetic Vlasov-Poisson code}},
author = {Ce Wang and Sven Van Loo and Geert Verdoolaege},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.11389},
eprint = {2609.11389},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.11389},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Modeling of plasma transport during edge-localized mode in tokamak using a kinetic Vlasov-Poisson code
AU - Ce Wang
AU - Sven Van Loo
AU - Geert Verdoolaege
PY - 2026
DA - 2026/09/10
PB - arXiv
DO - 10.48550/arxiv.2609.11389
UR - https://arxiv.org/abs/2609.11389
AB - A kinetic parallel transport code KOBRA based on a finite-volume method is developed to study edge localized mode (ELM) plasma transport from the mid-plane to divertor targets. The large scale separation between the Debye length (~cm) and the connection length (~10-20 m) leads to prohibitive computational cost in full 6D simulations. To alleviate this, an adaptive-mesh refinement (AMR) strategy is employed. Comparisons with uniform-grid simulations show that AMR accurately reproduces the characteristic ELM dynamics, including the rapid rise and slow decay of divertor fluxes, as well as the early-time peak induced by fast electrons. Analysis of the electron distribution and self-consistent electric field reveals that AMR efficiency is closely linked to phase-space evolution. Overall, AMR achieves comparable physical accuracy while reducing memory usage by 30-40% and accelerating computations by up to a factor of two, demonstrating its effectiveness for high-dimensional kinetic ELM simulations.
ER -