Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors
Abstract
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.
- Authors:
-
- 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
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1524559
- Alternate Identifier(s):
- OSTI ID: 1415666
- Grant/Contract Number:
- FG02-04ER54739
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Stepanenko, A. A., and Krasheninnikov, S. I. Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors. United States: N. p., 2018.
Web. doi:10.1063/1.5010932.
Stepanenko, A. A., & Krasheninnikov, S. I. Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors. United States. https://doi.org/10.1063/1.5010932
Stepanenko, A. A., and Krasheninnikov, S. I. 2018.
"Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors". United States. https://doi.org/10.1063/1.5010932. https://www.osti.gov/servlets/purl/1524559.
@article{osti_1524559,
title = {Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors},
author = {Stepanenko, A. A. and Krasheninnikov, S. I.},
abstractNote = {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.},
doi = {10.1063/1.5010932},
url = {https://www.osti.gov/biblio/1524559},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 1,
volume = 25,
place = {United States},
year = {Thu Jan 04 00:00:00 EST 2018},
month = {Thu Jan 04 00:00:00 EST 2018}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
Impact of divertor plasma parameters on characteristics of current-convective turbulence under DIII-D-like detached conditions
journal, December 2019
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Enhanced particle flux due to localized divertor MHD instability in DIII-D tokamak
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Figures / Tables found in this record: