A Michelson Interferometer for Electron Cyclotron Emission Measurements on EAST

LIU Yong (刘永); Stefan SCHMUCK; ZHAO Hailin (赵海林); John FESSEY; Paul TRIMBLE; LIU Xiang (刘祥); ZHU Zeying (朱则英); ZANG Qing (臧庆); HU Liqun (胡立群)

doi:10.1088/1009-0630/18/12/02

Plasma Science and Technology > 2016 > 18(12): 1148-1154. > DOI: 10.1088/1009-0630/18/12/02

LIU Yong (刘永), Stefan SCHMUCK, ZHAO Hailin (赵海林), John FESSEY, Paul TRIMBLE, LIU Xiang (刘祥), ZHU Zeying (朱则英), ZANG Qing (臧庆), HU Liqun (胡立群). A Michelson Interferometer for Electron Cyclotron Emission Measurements on EAST[J]. Plasma Science and Technology, 2016, 18(12): 1148-1154. DOI: 10.1088/1009-0630/18/12/02

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A Michelson Interferometer for Electron Cyclotron Emission Measurements on EAST

1Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China 2CCFE, Culham Science Centre, Abingdon, Oxon, OX14 3DB, UK

Funds: supported by National Natural Science Foundation of China (Nos. 11405211, 11275233), and the National Magnetic Confinement Fusion Science Program of China (Nos. 2013GB106002, 2015GB101000), and the RCUK Energy Programme (No. EP/I501045), partly supported by the JSPS-NRF-NSFC A3 Foresight Program in the Field of Plasma Physics (NSFC: No. 11261140328)

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Received Date: January 18, 2016

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Abstract

Abstract

A Michelson interferometer, on loan from EFDA-JET (Culham, United Kingdom) has recently been commissioned on the experimental advanced superconducting tokamak (EAST, ASIPP, Hefei, China). Following a successful in-situ absolute calibration the instrument is able to measure the electron cyclotron emission (ECE) spectrum, from 80 GHz to 350 GHz in extraordinary mode (X-mode) polarization, with high accuracy. This allows the independent determination of the electron temperature profile from observation of the second harmonic ECE and the possible identification of non-Maxwellian features by comparing higher harmonic emission with numerical simulations. The in-situ calibration results are presented together with the initial measured temperature profiles. These measurements are then discussed and compared with other independent temperature profile measurements. This paper also describes the main hardware features of the diagnostic and the associated commissioning test results.
- EAST,
- ECE,
- interferometer,
- calibration,
- electron temperature

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References

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