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Investigation of SOL parameters and divertor particle flux from electric probe measurements in KSTAR

Title
Investigation of SOL parameters and divertor particle flux from electric probe measurements in KSTAR
Author
정규선
Keywords
H-MODE DISCHARGES; ALCATOR C-MOD; HEAT-FLUX
Issue Date
2015-08
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF NUCLEAR MATERIALS, v. 463, Page. 424-427
Abstract
The upstream scrape-off layer (SOL) profiles and downstream particle fluxes are measured with a fast reciprocating Langmuir probe assembly (FRLPA) at the outboard mid-plane and a fixed edge Langmuir probe array (ELPA) at divertor region, respectively in the KSTAR. It is found that the SOL has a two-layer structure in the outboard wall-limited (OWL) ohmic and L-mode: a near SOL (similar to 5 mm zone) with a narrow feature and a far SOL with a broader profile. The near SOL width evaluated from the SOL profiles in the OWL plasmas is comparable to the scaling for the L-mode divertor plasmas in the JET and AUG. In the SOL profiles and the divertor particle flux profile during the ELMy H-modes, the characteristic e-folding lengths of electron temperature, plasma density and particle flux during an ELM phase are about two times larger than ones at the inter ELM. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0022311514008782http://hdl.handle.net/20.500.11754/27005
ISSN
0022-3115; 1873-4820
DOI
10.1016/j.jnucmat.2014.11.075
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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