境界のあるマグネトプラズマのマイクロ波吸収

概要

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The absorption, reflection and transmission of microwaves by plasma slabs with ma, magnetic fields are calculated for the assumption that the collision damping is only the power dissipating mechanism. The solution of Maxwell equations for electromagnetic wave propagation is derived as a boundary value problem and numerically computed for various plasma parameters, magnetic fields and the slabthickness. It is of interest that the maximum absorptions appear. not only in the vicinity of the hybrid resonance but of the cut off points for uniform plasma slabs ticker than a wave length in free space and the conditions of maximum absorption somewhat deviate from the resonance or cut off. Such maximum absorptions can not be easily expected from Allis diagram which is valid only for an infinite collisionless plasma.<BR>Such absorption pattern is also useful for estimating the electron temperature from the microwave power emitted from the plasmas, since the absorptivity is related to the emissivity.<BR>Moreover, an example of a plasma slab with non uniformly distributed electrons is also computed by directly solving wave ecivations.
社団法人プラズマ・核融合学会の論文