Investigation of SOL parameters and divertor particle flux from electric probe measurements in KSTAR
- Authors
- Bak, Jungyo; Kim, Heungsu; Bae, Min-Keun; Juhn, June-Woo; Seo, Dae Chul; Bang, Eunnam; Shim, Seong-Bo; Chung, Kyu Sun; Lee, Haejune; Hong, Suk-Ho
- Issue Date
- Aug-2015
- Publisher
- ELSEVIER
- Citation
- JOURNAL OF NUCLEAR MATERIALS, v.463, pp.424 - 427
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NUCLEAR MATERIALS
- Volume
- 463
- Start Page
- 424
- End Page
- 427
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/143401
- DOI
- 10.1016/j.jnucmat.2014.11.075
- ISSN
- 0022-3115
- 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.
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