Breathing oscillations in enlarged cylindrical-anode-layer Hall plasma accelerator

Breathing oscillations in enlarged cylindrical-anode-layer Hall plasma accelerator
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扩大的圆柱形阳极层霍尔等离子体加速器中的呼吸振荡

DOI:
10.1063/1.4807584
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发表时间:
2013-05
影响因子:
3.2
通讯作者:
Chu, Paul K.
Chu, Paul K.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Wang, C. X.;Fu, R. K. Y.;Qiu, X. M.;Chu, Paul K.

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采用三维粒子池模拟方法研究了放大圆柱阳极层霍尔等离子体加速器放电过程中的呼吸振荡。与传统的圆形霍尔等离子体加速器的呼吸模式不同,这里的体等离子体振荡是由集中的离子束产生的势垒触发的,并且足够大,足以与阳极电压竞争。阳极附近的电场受到势垒的抑制,从而使电子密度降低了约36%。浓束爆炸后,放电恢复到正常水平,完成一个周期的电驱动呼吸振荡。PIC仿真识别的呼吸模式的频率范围为~ 156 kHz ~ ~ 250 kHz,并且不随放电电压单调变化。
Breathing oscillations in the discharge of an enlarged cylindrical-anode-layer Hall plasma accelerator are investigated by three-dimensional particle-in-cell (PIC) simulation. Different from the traditional breathing mode in a circular Hall plasma accelerator, the bulk plasma oscillation here is trigged by the potential barrier generated by the concentrated ion beam and substantial enough to compete with the anode voltage. The electric field near the anode is suppressed by the potential barrier thereby decreasing the electron density by ∼36%. The discharge is restored to the normal level after the concentrated beam explodes and then it completes one cycle of electro-driven breathing oscillation. The breathing mode identified by the PIC simulation has a frequency range of ∼156 kHz–∼250 kHz and does not vary monotonically with the discharge voltage.
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发表时间: 1997-07
期刊: --
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