摘要
为了深入研究等离子射流阵列的放电特性,利用上升沿1μs、脉宽2μs的微秒脉冲电源产生等离子体射流,通过电压电流波形的测量和发光图像的拍摄,研究了在针-环双电极结构下,不同电极位置以及不同重复脉冲频率下氦气等离子体射流阵列的放电特性。实验结果表明放电最初产生在阵列的两端,随着外加电压幅值的增加,中心管也会有射流产生,最终形成射流阵列。随地电极距管口距离的变远,放电电流和中心管的射流长度均呈现出先增大后减小的变化趋势(20mm处取得最大值),随着重复脉冲频率的增大,放电由不均匀的丝状放电向均匀放电转变,放电电流先减小而后保持不变。
In order to study the characteristics of a plasma jet array,the discharge was driven by a microsecond pulse generator with 1-μs rise time and 2-μs duration.With a needle-ring configuration,the discharge properties of the helium plasma jet array at different ground electrode positions and repetition pulse frequencies were studied by means of voltage and current measurement and light-emission pictures.The experimental results show that the discharge was initiated at the edges of the plasma jet array at first.With the increase of the applied voltage,the plasma jet occurred in the middle tube,and the plasma jet array was finally formed.When the gap between the ground electrode and the tube nozzle increased,the amplitude of discharge current increased at first,and then decreased(the maximum value was at the gap of 20mm).With the increase of repetition pulse frequency,the discharge mode changed from filamentary discharge to homogeneous discharge,the discharge current decreased at first, and then remained unchanged.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2014年第4期62-66,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(51222701
51207154
51377075)
电力设备电气绝缘国家重点实验室开放基金项目(EIPE12204)
国家重点基础研究发展计划(2014CB239505)
关键词
微秒脉冲
等离子体射流
射流阵列
放电特性
重复频率
microsecond pulse
plasma jet
jet array
discharge characteristics
repetition pulse frequency
