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首页> 外文期刊>Plasma physics and controlled fusion >Wave power flux and ray-tracing in regions of resonant absorption
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Wave power flux and ray-tracing in regions of resonant absorption

机译：共振吸收区域的波功率通量和射线追踪

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The propagation of waves in weakly dissipative plasmas is investigated. A new expression for the wave energy flux is obtained, which is proportional to partial derivative lambda'(mode)/partial derivative k, where lambda'(mode) is the real part of the eigenvalue of the dispersion tensor corresponding to the wave mode. Significant differences from the usual definition of dielectric wave energy flux occur in case of a non-negligible anti-Hermitian contribution to the dielectric tensor. This occurs, for example, near electron cyclotron resonance. The direction of the corrected wave energy flux is consistent with that of the trajectory of a wave beam crossing the EC resonance as obtained in Westerhof (Westerhof E 1997 Plasma Phys. Control. Fusion 39 1015). It is shown that ray-tracing near cyclotron resonance can be performed with the use of lambda'(mode) as ray-Hamiltonian. [References: 18]
机译：研究了波在弱耗散等离子体中的传播。获得了波能通量的新表达式，该表达式与偏导数lambda'（众数）/偏导数k成比例，其中lambda'（众数）是与波模相对应的色散张量特征值的实部。如果对介电张量的反赫耳米特贡献不可忽略，则与介电波能量通量的通常定义存在明显差异。例如，这发生在电子回旋共振附近。校正后的波能通量的方向与在Westerhof（Westerhof E 1997 Plasma Phys.Control。Fusion 39 1015）中获得的穿过EC共振的光束轨迹的方向一致。结果表明，回旋共振附近的射线追踪可以通过使用λ'（模式）作为射线-哈密顿量进行。 [参考：18]

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