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首页> 外文会议>AIAA SciTech forum and exposition >Application of a Streak Camera for Optical Diagnostics of Nanosecond Repetitively Pulsed Plasma Discharges
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Application of a Streak Camera for Optical Diagnostics of Nanosecond Repetitively Pulsed Plasma Discharges

机译：条纹相机在纳秒级重复脉冲等离子体放电光学诊断中的应用

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摘要

A new experimental diagnostic is developed to study the dynamics of nanosecond plasma discharges with extremely high temporal resolution. A streak camera is used in the experiment with and without a spectrometer to capture time resolved plasma spectra and images. A high bandwidth oscilloscope with data logging capability is used with the camera and plasma pulser to measure current, voltage, plasma lifetime and energy simultaneously for each acquisition of the streak camera. Two conical electrodes with a separation of 1 to 3 mm and a pulse repetition frequency of 5 kHz are used to generate the plasma discharge at 300 K and 1 atm. Time-resolved direct imaging shows extremely fast development of the plasma with 3 distinct phases, and the streak-spectroscopy results indicate bi-exponential decay of the second positive system of molecular nitrogen with rapid decay during the first phase and a relatively slower decay during the second phase.
机译：开发了一种新的实验诊断工具，以极高的时间分辨率研究纳秒等离子体放电的动力学。实验中使用了带条纹的照相机（带或不带光谱仪）来捕获时间分辨的等离子体光谱和图像。带有数据记录功能的高带宽示波器与照相机和等离子脉冲发生器一起使用，以每次条纹相机拍摄时同时测量电流，电压，等离子体寿命和能量。使用两个间隔为1到3毫米，脉冲重复频率为5 kHz的锥形电极来产生300 K和1 atm的等离子体放电。时间分辨直接成像显示了具有3个不同相的等离子体的极快发展，并且条纹光谱结果表明分子氮的第二正系统呈双指数衰减，在第一阶段具有快速衰减，而在第一阶段则具有相对较慢的衰减。第二阶段。

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