Overview of the electron cyclotron emission measurements on EAST

•This paper presents an overview of the ECE diagnostics on EAST, and the topic is interesting to the ECE community.•Conventional ECE diagnostics, including radiometer systems and Michelson interferometer, on EAST have been calibrated independently.•A correlation ECE diagnostic was designed and commi...

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Published inFusion engineering and design Vol. 136; pp. 72 - 75
Main Authors Liu, Yong, Zhao, Hailin, Zhou, Tianfu, Liu, Xiang, Zhu, Zeying, Han, Xiang, Schmuck, Stefan, Fessey, John, Trimble, Paul, Domier, C.W., Luhmann, N.C., Ti, Ang, Li, Erzhong, Ling, Bili, Hu, Liqun, Feng, Xi, Liu, Ahdi, Rowan, W.L., Huang, H., Phillips, P.E.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.11.2018
Elsevier Science Ltd
Subjects
Antennas
Calibration
Corrugated waveguides
Cyclotrons
Diagnostic systems
EAST
ECE
Electron energy
Electron temperature
Electron temperature measurement
Electrons
Emission
In situ calibration
Plasma etching
Plasmas
Radiometers
Temperature measurement
Variations
Electron temperature
EAST
ECE
In situ calibration
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Summary:•This paper presents an overview of the ECE diagnostics on EAST, and the topic is interesting to the ECE community.•Conventional ECE diagnostics, including radiometer systems and Michelson interferometer, on EAST have been calibrated independently.•A correlation ECE diagnostic was designed and commissioned on EAST for detecting small-amplitude, broadband Te fluctuation. Radiometer systems and a Michelson interferometer, have been operated routinely to detect the electron cyclotron emission (ECE) from EAST plasmas for diagnosing the local electron temperature. A common quasi-optical antenna placed inside the vacuum vessel is employed to collect and focus the plasma emission, and the line of sight is along a radial chord. All of the systems are located in a diagnostic room where the plasma emission is transmitted by overmoded corrugated waveguide. In situ absolute intensity calibration has been carried out for both the radiometer systems and the Michelson interferometer independently, to ensure that the ECE diagnostic provides an independent electron temperature measurement. In order to diagnose the small-amplitude electron temperature fluctuation, a correlation ECE (CECE) diagnostic has been designed and commissioned recently. The CECE diagnostic employs an independent antenna system which has improved poloidal resolution.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2017.12.032