Dynamic of ion density perturbations observed in a microwave-plasma interaction
Dynamic of ion density perturbations observed in a microwave-plasma interaction
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DOI：
10.1063/1.2126815
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发表时间：
2005-11
影响因子：
2.2
通讯作者：
M. Kamal-Al-Hassan;Hiroaki Ito;N. Yugami;Y. Nishida
中科院分区：
文献类型：
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作者：
M. Kamal-Al-Hassan;Hiroaki Ito;N. Yugami;Y. Nishida
实验观察到微波与等离子体相互作用中离子密度扰动以低频波动性质传播的动力学行为。本文研究了最大功率P= 10 kW、脉宽约为离子等离子体周期（τpi <$2 π scin ωpi）的微波斜入射对非磁化、非均匀实验室等离子体的辐照。频率为ω0的相互作用微波的p极化电场分量在满足ω0=ωp的临界层处通过共振吸收过程导致有质动力驱动的非线性现象。非线性离子密度扰动是由共振层产生的，并以静电波的性质传播到低密度等离子体中。
The dynamical behavior of ion density perturbations propagated at low-frequency wave nature is experimentally observed in microwave-plasma interaction. An unmagnetized, inhomogeneous laboratory plasma irradiated by an obliquely incident microwave with maximum power P=10kW and pulse width approximately ion plasma period (τpi≈2π∕ωpi) is studied. The p-polarized electric-field component of the interacted microwave of frequency ω0 leads to a nonlinear phenomenon driven by the ponderomotive force by the process of resonance absorption at the critical layer where ω0=ωp is satisfied. The nonlinear ion density perturbations are created from the resonant layer and propagated to an underdense plasma as an electrostatic wave nature.