Post calibration of the two-dimensional electron cyclotron emission imaging instrument with electron temperature characteristics of the magnetohydrodynamic instabilities
- National Fusion Research Institute, Daejeon 34133 (Korea, Republic of)
- Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784 (Korea, Republic of)
- Ulsan National Institute of Science and Technology, Ulsan 689-798 (Korea, Republic of)
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
The electron cyclotron emission imaging (ECEI) instrument is widely used to study the local electron temperature (T{sub e}) fluctuations by measuring the ECE intensity I{sub ECE} ∝ T{sub e} in tokamak plasmas. The ECEI measurement is often processed in a normalized fluctuation quantity against the time averaged value due to complication in absolute calibration. In this paper, the ECEI channels are relatively calibrated using the flat T{sub e} assumption of the sawtooth crash or the tearing mode island and a proper extrapolation. The 2-D relatively calibrated electron temperature (T{sub e,rel}) images are reconstructed and the displacement amplitude of the magnetohydrodynamic modes can be measured for the accurate quantitative growth analysis.
- OSTI ID:
- 22482820
- Journal Information:
- Review of Scientific Instruments, Vol. 87, Issue 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multichannel electron cyclotron emission radiometry for magnetohydrodynamic mode studies in TEXTOR
Noise suppression for MHD characterization with electron cyclotron emission imaging 1D technique