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

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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

[1]	Shimada M et al 2007 Nucl. Fusion 47 S1
[2]	Zhang X J et al 2015 AIP Conf. Proc. 1689 030012
[3]	Garofalo A M et al 2017 Nucl. Fusion 57 076037
[4]	Gong X Z et al 2017 Plasma Sci. Technol. 19 032001
[5]	Ando A et al 1986 Nucl. Fusion 26 107
[6]	Ando A et al 1986 Phys. Rev. Lett. 56 2180
[7]	Yamamoto T et al 1987 Phys. Rev. Lett. 58 2220
[8]	Kawashima H et al 1991 Nucl. Fusion 31 495
[9]	Maekawa T et al 1993 Phys. Rev. Lett. 70 2561
[10]	Maehara T et al 1998 Nucl. Fusion 38 39
[11]	Giruzzi G et al 2004 Phys. Rev. Lett. 93 255002
[12]	Dumont R J and Giruzzi G 2004 Phys. Plasmas 11 3449
[13]	Yang Y L, Xiang N and Hu Y M 2017 Phys. Plasmas 24 082503
[14]	Zhai X M et al 2019 Phys. Plasmas 26 052509
[15]	Ott E, Hui B and Chu K 1980 Phys. Fluids 23 1031
[16]	Fidone I, Granata G and Meyer R L 1982 Phys. Fluids 25 2249
[17]	Qian J P et al 2017 Nucl. Fusion 57 036008
[18]	Sheffield J 1972 Plasma Phys. 14 783
[19]	Smirnov A et al 1994 Bull. Am. Phys. Soc 39 1626
[20]	Lin-Liu Y R, Chan V S and Prater R 2003 Phys. Plasmas 10 4064
[21]	Harvey R W and McCoy M G The cql3d Fokker–Planck code Technical Report (GA-A-20978; CONF-9206235-3 ON: DE93002962)
[22]	Karney C F F and Fisch N J 1979 Phys. Fluids 22 1817
[23]	Braams B J and Karney C F F 1989 Phys. Fluids B: Plasma Phys. 1 1355
[24]	Kennel C F and Engelmann F 1966 Phys. Fluids 9 2377
[25]	Lerche I 1968 Phys. Fluids 11 1720
[26]	Fidone I et al 1986 Phys. Fluids 29 803
[27]	Fidone I et al 1978 Phys. Fluids 21 645
[28]	Bellan P M and Porkolab M 1976 Phys. Fluids 19 995
[29]	Fuchs V et al 1995 Nucl. Fusion 35 1
[30]	Stix T H 1992 Waves in Plasmas (New York: American Institute of Physics)
[31]	Reiman A H and Fisch N J 2018 Phys. Rev. Lett. 121 225001
[32]	Huang Y H et al 2021 Nucl. Fusion 61 096026
[33]	Pfeiffer W et al 1980 ONETWO: a computer code for modeling plasma transport in tokamaks Technical Report General Atomics, US