微秒脉冲激励的大气压氦等离子体射流放电特性

发布时间：2018-01-09 02:18

本文关键词：微秒脉冲激励的大气压氦等离子体射流放电特性　出处：《强激光与粒子束》2016年05期 　论文类型：期刊论文

【摘要】：研究了不同电极结构以及放电参数对微秒脉冲激励的氦等离子体射流放电特性的影响。实验中采用不同管内径、不同电极形状、不同重复频率等参数,通过采集放电阶段的电流电压图、发光图像以及发射光谱等,对等离子体射流的电学特性和光学特性进行诊断。实验结果表明,随着管内直径的增大,氦等离子体射流的长度减小;管内径为8mm时,等离子体射流的击穿电压与放电电流最小,同时,其发射光谱中第二正带系N2,N+2和O等高能活性粒子的强度最高;管内径为5mm的等离子体射流的放电电流、功率及消耗的能量最大;在相同实验条件下,针尖电极结构中的放电电流、消耗的功率还有发射光谱强度都较大;随着重复频率的增加,氦等离子体射流的长度会增加,但击穿电压减小。
[Abstract]:The effects of different electrode structure and discharge parameters on the discharge characteristics of helium plasma jet excited by microsecond pulse were studied. The parameters such as different tube inner diameter, different electrode shape and different repetition rate were used in the experiment. The electrical and optical characteristics of the plasma jet are diagnosed by collecting the current and voltage diagrams, luminescence images and emission spectra of the discharge stage. The experimental results show that the electrical and optical characteristics of the plasma jet increase with the increase of the diameter of the tube. The length of helium plasma jet decreases; When the tube diameter is 8 mm, the breakdown voltage and discharge current of the plasma jet are the smallest, and the second positive band N _ 2N _ 2 and O active particles have the highest intensity in the emission spectrum. The discharge current, power and energy consumption of the plasma jet with the inner diameter of 5 mm are the largest. Under the same experimental conditions, the discharge current, power consumption and emission spectrum intensity in the tip electrode structure are large. With the increase of repetition rate, the length of helium plasma jet increases, but the breakdown voltage decreases.
【作者单位】：南京工业大学自动化与电气工程学院;中国科学院电工研究所;中国科学院电力电子与电气驱动重点实验室;
【基金】：国家自然科学基金项目(51222701,51377075)
【分类号】：O358
【正文快照】： 大气压低温等离子体射流是近年来一种新兴的等离子体产生技术,它在环境保护、材料改性、污水处理、生物医学等众多领域有着广泛的应用[1-5]。相对于介质阻挡放电、辉光放电等放电形式,低温等离子体射流具有可控制性好、高能活性粒子多等优点,在气体放电领域越来越受到关注[6-1

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