Relativistic effect on synergy of electron cyclotron and lower hybrid waves on EAST

Longhao MA (马龙豪); Nong XIANG (项农); Yueheng HUANG (黄跃恒); Yemin HU (胡业民); Xuemei ZHAI (翟雪梅)

doi:10.1088/2058-6272/ac2249

Plasma Science and Technology > 2021 > 23(12): 125102. > DOI: 10.1088/2058-6272/ac2249

Longhao MA (马龙豪), Nong XIANG (项农), Yueheng HUANG (黄跃恒), Yemin HU (胡业民), Xuemei ZHAI (翟雪梅). Relativistic effect on synergy of electron cyclotron and lower hybrid waves on EAST[J]. Plasma Science and Technology, 2021, 23(12): 125102. DOI: 10.1088/2058-6272/ac2249

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Relativistic effect on synergy of electron cyclotron and lower hybrid waves on EAST

¹ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
² University of Science and Technology of China, Hefei 230026, People's Republic of China
³ Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People's Republic of China
⁴ Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China

Funds: This work was supported by the National Key R&D Program of China (No. 2017YFE0300406) and National Natural Science Foundation of China (Nos. 11 975 272, 12 075 276, 11 375 234, 11 805 133 and 12 005 258).

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Received Date: May 22, 2021
Revised Date: August 25, 2021
Accepted Date: August 29, 2021

Graphical Abstract

Abstract

Abstract

In recent experiments on EAST, the electron temperature at the center can be raised to 9.7 keV by injecting electron cyclotron (EC) and lower hybrid (LH) waves simultaneously. With such strong core electron heating, the relativistic effect could play an important role in the interactions between the plasma and waves. In order to explore the relativistic effect on synergy between the EC and LH waves on EAST, ray-tracing/Fokker–Planck simulations are conducted to investigate electron heating for a typical discharge with a center electron temperature of 9.7 keV. It is found that the relativistic effect can cause the EC wave to deposit its power deeper in the plasma core, where the synergy between the EC and LH waves occurs and enhances the absorption of the LH waves. As a result, a high center electron temperature can be achieved.
- electron cyclotron waves,
- lower hybrid waves,
- synergy effect,
- relativistic effect

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References (33)

References

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