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22-27 October 2018
Mahatma Mandir Conference Centre
Asia/Kolkata timezone
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Overview of diagnostics upgrade and experiment progress on KTX

22 Oct 2018, 14:00
4h 45m
Mahatma Mandir Conference Centre

Mahatma Mandir Conference Centre

Gandhinagar (nearest Airport: Ahmedabad), India
Overview Poster OV - Overviews OV/P P1-P8 Overview Posters

Speaker

Prof. Wandong Liu (University of Science and Technology of China)

Description

The Keda Torus eXperiment (KTX) is a new built middle-size reversed field pinch (RFP) device at the University of Science and Technology of China. After the long time conditioning, the favorable wall condition is achieved for implementing experiment on KTX. In present, the maximum plasma current can reach 200kA, the discharge length is beyond 20ms and the duration of typical reversed field pinch state is 2.0ms. The diagnostics on KTX has been greatly developed: 1) Total number of DAQ channel has been upgraded to 960; 2) Terahertz interferometer has been upgraded to 7 chords to obtain density and current profiles; 3) Thomson scattering with 3Joule Laser is undergoing commissioning; 4) 3D Langmuir probe system has been developed for the electromagnetic turbulence measurement; 5) 3D double-foil soft X-ray diagnostics are mounted on two poloidal sections for 3D MHD research; 6) Edge capacitive probe has been installed for the radial electrical field measurement; 7) multi-channel spectrograph system has been built for detecting impurities of carbon and oxygen. After the wall condition improvement and diagnostics upgrade, many early research such as the 3D RFP physics and electromagnetic turbulence, etc., have been conducted on KTX. The forward scattering is observed by the interferometer system which shows the potential for turbulence research with wider spectrum after improving the beam size and acceptance angle of the diagnostic beam through plasma. The research on MHD activities related with 3D RFP physics on KTX is intensely carried out with the capability upgrade of magnetic field measurement, soft X-ray tomography and high-speed visible imaging system. The electromagnetic turbulence is tentatively investigated on KTX. The 3D spectra characters of electromagnetic turbulence are firstly measured with classical two-point technique by the 3D Langmuir probe arrays, particularly in the small wavenumber range, providing the new prospect of electromagnetic turbulence in RFP plasmas. The confinement improvement of turbulence suppression is achieved in Biasing electrode experiment. The resistive MHD modelling of QSH state using NIMROD is setup in the KTX regimes. In the next step, higher performance plasma of KTX with larger plasma current, higher temperature and longer energy confinement time is expected with the capacity upgrade in the second phase.
Country or International Organization China, People's Republic of
Paper Number OV/P-8

Primary author

Prof. Wandong Liu (University of Science and Technology of China)

Co-authors

Prof. Ahdi Liu (University of Science and Techonlogy of China) Prof. Biao Shen (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Bing Luo (University of Science and Technology of China) Prof. Bingjia Xiao (Chinese Academy of Sciences) Prof. Chijin Xiao (University of Saskatchewan) Dr Cui Tu (University of Science and Technology of China) Prof. Ge Zhuang (University of Science and Technology of China) Mr Hai Wang (University of Science and Techonlogy of China) Dr Haiyang Zhou (University of Science and Technology of China) Dr Hangqi Xu (University of Science and Technology of China) Dr Hao Xu (Institute of Plasma Physics, Chinese Academy of Sciences) Prof. Hong Li (University of Science and Techonlogy of China) Prof. Huazhong Wang (Institute of Plasma Physics, Chinese Academy of Sciences) Prof. Jian Zheng (University of Science and Techonlogy of China) Prof. Jinlin Xie (University of Science and Techonlogy of China) Dr Jintong Hu (University of Science and Technology of China) Dr Jinxing Zheng (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Junfeng Zhu (University of Science and Technology of China) Dr MingSheng Tan (University of Science and Technology of China) Prof. Peng Fu (Institute of Plasma Physics, Chinese Academy of Sciences) Prof. Ping Zhang (Institute of Plasma Physics, Chinese Academy of Sciences) Prof. Qingxi Yang (Institute of Plasma Physics, Chinese Academy of Sciences) Mr Shude Wan (University of Science and Techonlogy of China) Prof. Tao Lan (University of Science and Technology of China) Dr Wei Bai (University of Science and Technology of China) Dr Wei You (University of Science and Technology of China) Dr Weixing Ding (UCLA) Dr Xiaohui Wen (University of Science and Technology of China) Dr Yolbarsop Adil (University of Science and Technology of China) Prof. Yuntao Song (Institute of Plasma Physics, Chinese Academy of Sciences) Prof. Zhengping Luo (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Zichao Li (University of Science and Technology of China) Dr tijian Deng (University of Science and Technology of China) Dr wenzhe mao (University of Science and Technology of China)

Presentation Materials