Penetration of high-frequency waves into a weakly inhomogeneous magnetized plasma at oblique incidence and their transformation to Bernstein modes
Penetration of high-frequency waves into a weakly inhomogeneous magnetized plasma at oblique incidence and their transformation to Bernstein modes
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高频波斜入射弱非均匀磁化等离子体的穿透及其向伯恩斯坦模式的转变
DOI：
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发表时间：
1973
影响因子：
2.5
通讯作者：
V. Kopecký
中科院分区：
文献类型：
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作者：
J. Preinhaelter;V. Kopecký
研究了高频电磁波在弱非均匀磁化等离子体中的传播。我们假设密度梯度垂直于外磁场，波从真空斜入射到等离子体上。我们发现，在相当宽的入射角γ范围内，寻常波通过等离子体共振的透射系数在γ0 = arcsin（Ωc/）（Ωo + Ω）1/2附近近似等于1。透射的寻常波在更高的密度下完全转变为非常波。然后传播回密度较小的区域，并在混合共振附近完全转变为伯恩斯坦模。当高频能量以非常波的形式传输到等离子体中时，与倏逝层有关的复杂情况可以通过使用具有适当选择的入射角的寻常波来消除。
Propagation of high-frequency electromagnetic waves in a weakly inhomogeneous magnetized plasma is investigated. We suppose the density gradient to be perpendicular to an external magnetic field, and the waves to be incident obliquely upon the plasma from vacuum. We find that the transmission coefficient of the ordinary wave through the plasma resonance is approximately equal to one in a fairly wide range of angles of incidence γ near the value γ0 = arcsin (Ωc/)(Ωo + Ω) ½. The transmitted ordinary wave is fully transformed into an extraordinary wave at higher densities. Then it propagates back to the region of a smaller density, and is fully transformed into the Bernstein modes in the vicinity of the hybrid resonance. Complications connected with the evanescent layer, which arise when the high-frequency energy is transmitted into the plasma in the form of the extraordinary wave, can thus be removed by using the ordinary wave with the angle of incidence chosen appropriately.