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Study on divertor particle and heat fluxes from electric probe measurements during ELMy H-modes in KSTAR

Title
Study on divertor particle and heat fluxes from electric probe measurements during ELMy H-modes in KSTAR
Author
정규선
Keywords
KSTAR; Divertor flux; ELMy H-mode; ELM mitigation; Electric probe
Issue Date
2016-01
Publisher
ELSEVIER SCIENCE SA
Citation
FUSION ENGINEERING AND DESIGN, v. 109, Page. 836-842
Abstract
The characteristics of the divertor particle and heat fluxes are investigated during ELM bursts in ELMy H-mode plasmas with the lower single (LSN) configuration in Korea Superconducting Tokamak Advanced Research (KSTAR). The particle and heat fluxes are evaluated from the electric probe measurements at the divertor region. It is found that the peak amplitude of the divertor flux during an ELM burst obtained near the outer strike point (OSP) decreases up to about 20% as the ELM frequency increases by a factor of similar to 6.5 due to the ELM mitigation and the plasma shaping, which is similar to the trend of the amplitude versus the frequency of the ELM observed in other tokamaks. The ELMs are mitigated by using several methods as magnetic perturbation (MP) field, supersonic molecular beam injection (SMBI) and electron cyclotron heating (ECH) at the edge region. In addition, the particle flux, evaluated at the far scrape-off layer (SOL) region, is less than 1% of the divertor particle flux. In this work, results from the experimental investigations of particle and heat fluxes during ELM bursts from the electric probe measurements at the divertor and far SOL regions are presented. (C) 2016 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0920379616300667?via%3Dihubhttp://hdl.handle.net/20.500.11754/30396
ISSN
0920-3796; 1873-7196
DOI
10.1016/j.fusengdes.2016.01.066
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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