Impact of the mass isotope on plasma confinement and transport properties in the HL-2A tokamak

Yu HE; Jun CHENG; Yuhong XU; Qian FANG; Yucai LI; Jianqiang XU; Weice WANG; Longwen YAN; Zhihui HUANG; Na WU; Min JIANG; Zhongbing SHI; Yi LIU; Wulyu ZHONG; Min XU

doi:10.1088/2058-6272/ac6356

Plasma Science and Technology > 2022 > 24(9): 095102. > DOI: 10.1088/2058-6272/ac6356

Yu HE, Jun CHENG, Yuhong XU, Qian FANG, Yucai LI, Jianqiang XU, Weice WANG, Longwen YAN, Zhihui HUANG, Na WU, Min JIANG, Zhongbing SHI, Yi LIU, Wulyu ZHONG, Min XU. Impact of the mass isotope on plasma confinement and transport properties in the HL-2A tokamak[J]. Plasma Science and Technology, 2022, 24(9): 095102. DOI: 10.1088/2058-6272/ac6356

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Impact of the mass isotope on plasma confinement and transport properties in the HL-2A tokamak

1.
Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Peopleʼs Republic of China
2.
Southwestern Institute of Physics, Chengdu 610041, Peopleʼs Republic of China

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Corresponding author:
Yuhong XU, E-mail: xuyuhong@swjtu.edu.cn
Received Date: February 15, 2022
Revised Date: March 30, 2022
Accepted Date: March 31, 2022
Available Online: December 07, 2023
Published Date: July 17, 2022

Graphical Abstract

Abstract

Abstract

The impact of the mass isotope on plasma confinement and transport properties has been investigated in Ohmically-heated hydrogen and deuterium plasmas in the HL-2A tokamak. Experimental results show that under similar discharge parameters the deuterium plasma has better confinement and lower turbulent transport than the hydrogen one, and concomitantly, it is found that the magnitude of geodesic acoustic mode zonal flows, the tilting angle of the Reynolds stress tensor and the turbulence correlation lengths are all larger in the edge region of the deuterium plasma. The results provide direct experimental evidence on the importance of the nonlinear energy coupling between ambient turbulence and zonal flows for governing the isotope effects in fusion plasmas.
- isotope effect,
- confinement and transport,
- turbulence and zonal flows

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Acknowledgments

The authors thank to the HL-2A team for their operational assistance in the experiment. This work was partially supported by National Natural Science Foundation of China (Nos. 11820101004, 11875017, 12075079 and 51821005) and partially supported by the National Key R & D Program of China (No. 2019YFE03020000), the National Magnetic Confinement Fusion Science Program of China (No. 2018YFE0310300), the Science and Technology Plan Project in Sichuan Province of China (No. 2020YFSY0047) and Sichuan International Science and Technology Innovation Cooperation Project (No. 2021YFH0066).

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Impact of the mass isotope on plasma confinement and transport properties in the HL-2A tokamak

Abstract