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

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3483209· OSTI ID:22058704

Yun, G S; Lee, W; Choi, M J; Kim, J B; Park, H K ^[1]; Domier, C W; Tobias, B; Liang, T; Kong, X; Luhmann, Jr, N C ^[2]; Donne, A J. H. ^[3]

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1. Pohang University of Science and Technology, Pohang, Gyungbuk 790-784 (Korea, Republic of)
2. University of California, Davis, California 95616 (United States)
3. FOM Institute for Plasma Physics Rijnhuizen, 3430 BE Nieuwegein (Netherlands)

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. Donneet 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.

• OSTI ID: 22058704
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 81; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
EDGE LOCALIZED MODES
ELECTRON DENSITY
ELECTRON EMISSION
ELECTRON TEMPERATURE
FLUCTUATIONS
H-MODE PLASMA CONFINEMENT
HEAT TRANSFER
L-MODE PLASMA CONFINEMENT
MAGNETOHYDRODYNAMICS
PLASMA DIAGNOSTICS
SAWTOOTH OSCILLATIONS
TEARING INSTABILITY
TEXTOR TOKAMAK