Electromagnetic effects on dynamics of high-beta filamentary structures

Lee, Wonjae; Umansky, Maxim V.; Angus, J. R.; Krasheninnikov, Sergei I.

doi:10.1063/1.4905639

Title: Electromagnetic effects on dynamics of high-beta filamentary structures

Journal Article · Mon Jan 12 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4905639· OSTI ID:1305840

Lee, Wonjae ^[1]; Umansky, Maxim V. ^[2]; Angus, J. R. ^[3]; Krasheninnikov, Sergei I. ^[1]

Univ. of California San Diego, La Jolla, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Naval Research Lab. (NRL), Washington, DC (United States)

The impacts of the electromagnetic effects on blob dynamics are considered. Electromagnetic BOUT++ simulations on seeded high-beta blobs demonstrate that inhomogeneity of magnetic curvature or plasma pressure along the filament leads to bending of the blob filaments and the magnetic field lines due to increased propagation time of plasma current (Alfvén time). The bending motion can enhance heat exchange between the plasma facing materials and the inner SOL region. The effects of sheath boundary conditions on the part of the blob away from the boundary are also diminished by the increased Alfvén time. Using linear analysis and the BOUT++ simulation, it is found that electromagnetic effects in high temperature and high density plasmas reduce the growth rate of resistive drift wave turbulence when resistivity drops below some certain value. Lastly, in the course of blobs motion in the SOL its temperature is reduced, which leads to enhancement of resistive effects, so the blob can switch from electromagnetic to electrostatic regime, where resistive drift wave turbulence become important.

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

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); Kwanjeong Educational Foundation

Grant/Contract Number:: AC52-07NA27344; FG02-04ER54739; SC0010413; AC02-05CH11231

OSTI ID:: 1305840

Alternate ID(s):: OSTI ID: 1228483

Report Number(s):: LLNL-JRNL-698417; PHPAEN

Journal Information:: Physics of Plasmas, Vol. 22, Issue 1; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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References (21)

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Cited By (6)

Electromagnetic Viscous-Resistive-Drift-Wave Instability in Burning Plasma Rehman, Umer Journal of Fusion Energy, Vol. 38, Issue 5-6 https://doi.org/10.1007/s10894-019-00219-3	journal	May 2019
Two-fluid MHD regime of resistive drift-wave instability Yang, Shangchuan; Zhu, Ping; Xie, Jinlin Physics of Plasmas, Vol. 25, Issue 9 https://doi.org/10.1063/1.5043323	journal	September 2018
Stability of scrape-off layer plasma: A modified Rayleigh–Bénard problem Wilczynski, F.; Hughes, D. W.; Van Loo, S. Physics of Plasmas, Vol. 26, Issue 2 https://doi.org/10.1063/1.5064765	journal	February 2019
Interpretation of scrape-off layer profile evolution and first-wall ion flux statistics on JET using a stochastic framework based on fillamentary motion Walkden, N. R.; Wynn, A.; Militello, F. Plasma Physics and Controlled Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1361-6587/aa7365	journal	June 2017
Dynamics of scrape-off layer filaments in high β plasmas Hoare, D.; Militello, F.; Omotani, J. T. Plasma Physics and Controlled Fusion, Vol. 61, Issue 10 https://doi.org/10.1088/1361-6587/ab34f8	journal	September 2019
Interpretation of scrape-off layer profile evolution and first-wall ion flux statistics on JET using a stochastic framework based on filamentary motion Walkden, N. R.; Wynn, A.; Militello, F. arXiv https://doi.org/10.48550/arxiv.1706.01239	text	January 2017

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