PreprintarXiv licencearXiv
Counter-rotating density and current structures in a partially magnetized E×B plasma
Abstract
The first 3D kinetic simulation of a magnetron discharge reproduces the measured rotating spoke and reveals that density and current rotate in opposite directions: the m=1 spoke turns in the E×B direction at 90~kHz while m≃16 electron-cyclotron-drift-type filaments turn at 1.0~MHz, with no net propagation along B. Magnetic drifts exchange far more energy than they deposit, yet their spoke-front heating sustains the ionization. Following helical paths, the anode-directed current is relayed by de-trapping turbulence at the sheath edge (50\%) and by the spoke channel in the bulk (97\%).
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BibTeX
@misc{xiao2026counterrotating,
title = {{Counter-rotating density and current structures in a partially magnetized $\mathbfE\times\mathbfB$ plasma}},
author = {Pengze Xiao and Ya Zhang and Hongyu Wang and Wei Jiang and Jean-Pierre Boeuf},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.27853},
eprint = {2608.27853},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.27853},
}
RIS
TY - UNPB
TI - Counter-rotating density and current structures in a partially magnetized E×B plasma
AU - Pengze Xiao
AU - Ya Zhang
AU - Hongyu Wang
AU - Wei Jiang
AU - Jean-Pierre Boeuf
PY - 2026
DA - 2026/08/28
PB - arXiv
DO - 10.48550/arxiv.2608.27853
UR - https://arxiv.org/abs/2608.27853
AB - The first 3D kinetic simulation of a magnetron discharge reproduces the measured rotating spoke and reveals that density and current rotate in opposite directions: the m=1 spoke turns in the E×B direction at 90~kHz while m≃16 electron-cyclotron-drift-type filaments turn at 1.0~MHz, with no net propagation along B. Magnetic drifts exchange far more energy than they deposit, yet their spoke-front heating sustains the ionization. Following helical paths, the anode-directed current is relayed by de-trapping turbulence at the sheath edge (50\%) and by the spoke channel in the bulk (97\%).
ER -