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Development of KSTAR ECE imaging system for measurement of temperature fluctuations and edge density fluctuation

Title
Development of KSTAR ECE imaging system for measurement of temperature fluctuations and edge density fluctuation
Authors
Yun, GSLee, WChoi, MJKim, JBPark, HKDomier, CWTobias, BLiang, TKong, XLuhmann, NCDonne, AJH박현거
Date Issued
Oct-2010
Publisher
AMER INST PHYSICS
Abstract
The ECE imaging (ECEI) diagnostic tested on the TEXTOR tokamak revealed the sawtooth reconnection physics in unprecedented detail, including the first observation of high-field-side crash and collective heat transport [H. K. Park, N. C. Luhmann, Jr., A. J. H. Donne et al., Phys. Rev. Lett. 96, 195003 (2006)]. An improved ECEI system capable of visualizing both high-and low-field sides simultaneously with considerably better spatial coverage has been developed for the KSTAR tokamak in order to capture the full picture of core MHD dynamics. Direct 2D imaging of other MHD phenomena such as tearing modes, edge localized modes, and even Alfven eigenmodes is expected to be feasible. Use of ECE images of the optically thin edge region to recover 2D electron density changes during L/H mode transitions is also envisioned, providing powerful information about the underlying physics. The influence of density fluctuations on optically thin ECE is discussed. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3483209]
Keywords
TOKAMAK; OSCILLATIONS
URI
http://oasis.postech.ac.kr/handle/2014.oak/25262
DOI
10.1063/1.3483209
ISSN
0034-6748
Article Type
PROCEEDINGS PAPER
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