Numerical study of the current-convective instability driven by asymmetry of detachment in inner and outer divertors
- 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.
- 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
Web of Science
Impact of divertor plasma parameters on characteristics of current-convective turbulence under DIII-D-like detached conditions
|
journal | December 2019 |
Enhanced particle flux due to localized divertor MHD instability in DIII-D tokamak
|
journal | February 2020 |
Divertor impurity seeding experiments at the COMPASS tokamak
|
journal | September 2019 |
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