Measurement and control of the streamer head electric field in an atmospheric-pressure dielectric barrier plasma jet
Measurement and control of the streamer head electric field in an atmospheric-pressure dielectric barrier plasma jet
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DOI：
10.1088/0963-0252/23/1/015010
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发表时间：
2014-02
影响因子：
3.8
通讯作者：
P. Olszewski;E. Wagenaars;K. McKay;J. Bradley;J. Walsh
中科院分区：
文献类型：
--
作者：
P. Olszewski;E. Wagenaars;K. McKay;J. Bradley;J. Walsh
大气压力等离子体射流的传播动力学类似于阴极导向流光的传播动力学，并且部分地由流光头部处的高局部电场确定。这一贡献采用了基于偏振相关的斯塔克分裂和移动的可见氦线的光学光谱技术，以非侵入性地测量流光头电场。它表明，流光头部是由一个高场区的峰值幅度为24 kV cm−1，其次是一个低场区，29 kV cm−1，确定为流光的尾巴。示出了沿流光传播的轴线沿着定位的辅助电极的不同极性的电压脉冲的应用影响流光头部电场，并提供了对等离子体射流的传播动力学的控制水平，这一发现具有相当大的应用潜力。
The propagation dynamics of an atmospheric-pressure plasma jet resemble that of a cathode-directed streamer and are determined, in part, by the high localized electric field at the streamer head. This contribution employs an optical spectroscopy technique based on the polarization-dependent Stark splitting and shifting of visible helium lines to non-invasively measure the streamer head electric field. It is demonstrated that the streamer head is comprised of a high-field region with a peak magnitude of ∼24 kV cm−1, which is followed by a low-field region, ∼9 kV cm−1, identified as the streamer tail. The application of varying polarity voltage pulses to supplementary electrodes situated along the axis of streamer propagation is shown to influence the streamer head electric field and affords a level of control over the propagation dynamics of the plasma jet, a finding that has considerable application potential.