Toroidal mode number estimation of the edge-localized modes using the KSTAR 3-D electron cyclotron emission imaging system
SCIE
SCOPUS
- Title
- Toroidal mode number estimation of the edge-localized modes using the KSTAR 3-D electron cyclotron emission imaging system
- Authors
- Lee, J; Yun, GS; Lee, JE; Kim, M; Choi, MJ; Lee, W; Park, HK; Domier, CW; Luhmann, NC; Sabbagh, SA; Park, YS; Lee, SG; Bak, JG
- Date Issued
- 2014-06
- Publisher
- AIP Publishing
- Abstract
- A new and more accurate technique is presented for determining the toroidal mode number n of edge-localized modes (ELMs) using two independent electron cyclotron emission imaging (ECEI) systems in the Korea Superconducting Tokamak Advanced Research (KSTAR) device. The technique involves the measurement of the poloidal spacing between adjacent ELM filaments, and of the pitch angle alpha(*) of filaments at the plasma outboard midplane. Equilibrium reconstruction verifies that alpha(*) is nearly constant and thus well-defined at the midplane edge. Estimates of n obtained using two ECEI systems agree well with n measured by the conventional technique employing an array of Mirnov coils. (C) 2014 AIP Publishing LLC.
- Keywords
- ELM PRECURSORS; ASDEX UPGRADE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13087
- DOI
- 10.1063/1.4883180
- ISSN
- 0034-6748
- Article Type
- Article
- Citation
- REVIEW OF SCIENTIFIC INSTRUMENTS, vol. 85, no. 6, page. 63505, 2014-06
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.