Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors

Stepanenko, A. A.; Krasheninnikov, S. I.

doi:10.1063/1.5010932

Title: Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors

Journal Article · Thu Jan 04 00:00:00 EST 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5010932· OSTI ID:1524559

^[1]; Krasheninnikov, S. I. ^[2]

National Research Nuclear Univ., Moscow (Russia). Moscow Engineering Physics Inst. (MEPhI)
National Research Nuclear Univ., Moscow (Russia). Moscow Engineering Physics Inst. (MEPhI); Univ. of California, San Diego, CA (United States). Dept. of Mechanical and Aerospace Engineering

One of the possible mechanisms responsible for strong radiation fluctuations observed in recent experiments with detached plasmas at ASDEX Upgrade [Potzel et al., Nucl. Fusion 54, 013001 (2014)] can be related to the onset of the current-convective instability (CCI) driven by strong asymmetry of detachment in the inner and outer divertors of the tokamak [S. Krasheninnikov and A. Smolyakov, Phys. Plasmas 23, 092505 (2016)]. Here in this study, we present the physical model, used to simulate the CCI, and the first numerical results of modeling of the CCI dynamics in ASDEX Upgrade-like conditions. The simulation results provide frequency spectra of turbulent divertor plasma oscillations showing reasonably good agreement with the available experimental data.

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Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-04ER54739

OSTI ID:: 1524559

Alternate ID(s):: OSTI ID: 1415666

Journal Information:: Physics of Plasmas, Vol. 25, 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: 6 works

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Impact of divertor plasma parameters on characteristics of current-convective turbulence under DIII-D-like detached conditions Stepanenko, A. A.; Wang, H. Q.; Krasheninnikov, S. I. Physics of Plasmas, Vol. 26, Issue 12 https://doi.org/10.1063/1.5123388	journal	December 2019
Enhanced particle flux due to localized divertor MHD instability in DIII-D tokamak Wang, H. Q.; Watkins, J. G.; Guo, H. Y. Physics of Plasmas, Vol. 27, Issue 2 https://doi.org/10.1063/1.5140354	journal	February 2020
Divertor impurity seeding experiments at the COMPASS tokamak Komm, M.; Khodunov, I.; Cavalier, J. Nuclear Fusion, Vol. 59, Issue 10 https://doi.org/10.1088/1741-4326/ab34d2	journal	September 2019