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

被引:96
作者
Yun, G. S. [1 ]
Lee, W. [1 ]
Choi, M. J. [1 ]
Kim, J. B. [1 ]
Park, H. K. [1 ]
Domier, C. W. [2 ]
Tobias, B. [2 ]
Liang, T. [2 ]
Kong, X. [2 ]
Luhmann, N. C., Jr. [2 ]
Donne, A. J. H. [3 ]
机构
[1] Pohang Univ Sci & Technol, Pohang 790784, Gyungbuk, South Korea
[2] Univ Calif Davis, Davis, CA 95616 USA
[3] FOM Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands
关键词
TOKAMAK;
D O I
10.1063/1.3483209
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
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]
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页数:3
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