One-dimensional ordinary–slow extraordinary–Bernstein mode conversion in the electron cyclotron range of frequencies

Xingyu GUO (郭星宇); Zhe GAO (高喆); Guozhang JIA (贾国章)

doi:10.1088/2058-6272/aa6a50

Plasma Science and Technology > 2017 > 19(8): 85101-085101. > DOI: 10.1088/2058-6272/aa6a50

Xingyu GUO (郭星宇), Zhe GAO (高喆), Guozhang JIA (贾国章). One-dimensional ordinary–slow extraordinary–Bernstein mode conversion in the electron cyclotron range of frequencies[J]. Plasma Science and Technology, 2017, 19(8): 85101-085101. DOI: 10.1088/2058-6272/aa6a50

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One-dimensional ordinary–slow extraordinary–Bernstein mode conversion in the electron cyclotron range of frequencies

1 Department of Engineering Physics, Tsinghua University, Beijing 100084, People’s Republic of China
2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Grant Nos. 11325524 and 11261140327) and Ministry of Science and Technology of China (Contract No. 2013GB112001).

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Abstract

Abstract

The ordinary–slow extraordinary–Bernstein (O-SX-B) mode conversion in the electron cyclotron range of frequencies (ECRF) is revisited in slab geometry. The analytical formula of the O-SX conversion efficiency by Mjølhus is upgraded to include the magnetic field gradient, and the analytical expression of the SX-B conversion efficiency by Ram and Schultz is generalized for the case of oblique injection. Therefore, the conversion efficiency and optimal parallel refractive
index for the whole O-SX-B conversion are obtained analytically and a shift of optimal parallel refractive index due to SX-FX loss is found. Full wave calculations are also presented to be compared with the analytical results.
- mode conversion,
- ECRF,
- O-X conversion

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