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Characteristics of symmetric and anti-symmetric Hasegawa modes of surface waves in a plasma slab including collisional electrons and flowing ions

Myoung-Jae Lee, Young-Dae Jung2017年Plasma Physics and Controlled FusionIF 2.2出版社

The dispersion relation for electrostatic Hasegawa surface wave propagating on the interface of a cold dusty plasma slab whose constituents are collisional electrons, collisional streaming ions and dust grains is derived. We have found that there exist high- and low-frequency branches for both symmetric and anti-symmetric modes in the plasma slab. The real frequency of the wave is found to decrease as the ion collision frequency increases for both modes. In the case of the low-frequency branch, the phase velocity of the Hasegawa surface wave in a slab is always faster (slower) than that in a semi-bounded plasma for symmetric mode (anti-symmetric mode). We also found that the Hasegawa surface waves can be damped by the collisional dissipation. However, the characteristic of damping is quite different for the two modes: the magnitude of damping rate for symmetric (anti-symmetric) mode increases (decreases) as the slab thickness decreases.

日本語訳

冷たいダストプラズマのスラブ(その構成要素は衝突性電子、衝突性の流れを持つイオン、およびダスト粒子である)の界面を伝播する静電的長谷川表面波の分散関係を導出した。我々は、プラズマスラブにおいて対称モードと反対称モードの両方に対して高周波および低周波の分枝が存在することを見出した。波の実周波数は、両モードにおいてイオン衝突周波数が増加するにつれて減少することが見出された。低周波分枝の場合、スラブ内の長谷川表面波の位相速度は、対称モード(反対称モード)に対して、半有界プラズマ内のそれよりも常に速い(遅い)。また、長谷川表面波は衝突散逸によって減衰され得ることを見出した。しかしながら、減衰の特性は二つのモードでかなり異なる:対称(反対称)モードの減衰率の大きさは、スラブの厚さが減少するにつれて増加(減少)する。

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Surface wavesPlasma slab
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