Electric Properties of Chiral Plasma Plumes Without External Magnetic Field

Zou, Dan Dan; Ji, Qing Zhao; Kravchenko, O. V.; Atul, J.K.; Ostrikov, Kostya Ken

doi:10.1109/tps.2022.3217859

Cited by 4 publications

(1 citation statement)

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“…英管的轴线平行。石英管中单针电极放电通常产生沿管轴线直线传播的流注 [40] ，将脉冲电源设置为特定电气参数(脉冲电压 6kV，脉冲放电重复频率 700Hz，脉宽 3μs，工作气体气压 4kPa)时可以产生图 1 石英管中所示的螺旋形状等离子体放电通道，照片曝光时间为 1s。 [39] ，仅考虑电…”

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Mechanism of low-temperature helical streamer discharge driven by pulsed electromagnetic field

Zou¹,

Cheng-sheng²,

Pingzi³

et al. 2023

Acta Phys. Sin.

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Under the condition of specific pulse discharge parameters, the discharge mode conversion of the low-temperature plasma jet discharge channel that originally propagated along a straight line will occur, forming a three-dimensional helical plasma channel. Different from the traditional helical wave discharge, there is no external constant magnetic field in the experiment to destroy the poloidal symmetry of the dielectric tube, and the chiral direction of the helical streamer will change with the discharge parameters. In order to deeply understand the electromagnetic mechanism of the helical structure in the plasma jet, and understand the source and influencing factors of the poloidal electric field that leads to the helical shape and determines the chirality in this new type of discharge, we analyze the complex characteristics and electromagnetic mechanism of the helical streamer, such as the chiral direction, pitch, branching, by establishing a self-consistent plasma theoretical model. It is found that the phase of the poloidal wave mode has an effect on the chiral selection of the helical streamer, the electron density has an effect on the pitch of the streamer, and the repetition frequency has an effect on the bifurcation point. The above discharge characteristics and their influencing factors have important scientific significance for exploring the interaction mechanism of electromagnetic wave and plasma, and also provide experimental and theoretical support for the chiral application of low-temperature plasma.

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