| One-dimensional ordinary–slow extraordinary–Bernstein mode conversion in the electron cyclotron range of frequencies |
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| 摘 要： | 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 Mj?lhus 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.
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One-dimensional ordinary-slow extraordinary-Bernstein mode conversion in the electron cyclotron range of frequencies |
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| Authors: | Xingyu GUO Zhe GAO Guozhang JIA |
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| Affiliation: | 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 |
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| 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 Mj(o)lhus 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. |
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| Keywords: | mode conversion ECRF O-X conversion |
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