大气压氦等离子体射流传输及作用目标时空动态研究  

Spatiotemporal dynamics of atmospheric helium plasma jet transport and target

作　　者：夏洋 韩磊 孙忠界 褚浩博 王玉新[1] XIA Yang;HAN Lei;SUN Zhongjie;CHU Haobo;WANG Yuxin(School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2023年第2期186-193,共8页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金资助青年项目(11905094);辽宁省教育厅基本科研项目(LJKMZ20221429)。

摘　　要：在惰性气体为工作气体条件下,大气压等离子体射流通常是由具有周期传输特性的电离波组成.在大气压的条件下,基于时空分辨图像技术,研究了施加电压、电压脉冲宽度及气体流量对大气压纳秒脉冲氦等离子体射流传输及作用目标过程的时空动态特性的影响.实验结果表明电离波在空间中及作用表面后的传输行为受到了放电参数的显著影响.电离波喷出管口后,在潘宁电离和管口极化电场的共同作用下,电离波呈加速传输,之后其传输行为受到残余电荷、气体通道的建立和外加电场的共同作用影响.电离波与目标表面相互作用过程中,因表面极化电荷作用,其总电场矢量方向的改变造成了电离波在临近目标表面时发生“偏移”.Atmospheric pressure plasma jet are highly reproducible and propagate along the jet axis with noble gas,which has motivated describing these plasma jets as guided ionization waves(IWs).The effects of applied voltage,voltage pulse width and gas flow rate on the propagation of atmospheric nanosecond pulsed helium plasma jet and its interaction with dielectric target are studied.Based on spatiotemporal resolution image technology,the propagation velocity of IW is measured.The measurements show that the propagation of IW is significantly affected by the discharge parameters.After the IW is ejected from the nozzle,the IW is accelerated under the combined effect of Penning ionization and polarization electric field of the nozzle.After ejected from the nozzle,the propagation is affected by the combined effect of residual charge,gas channel establishment and external electric field.During the interaction between the IW and the target surface,due to the surface polarized charge,the change of the direction of the total electric field vector causes the“deviation”of IW.

关 键 词：大气压等离子体射流 时空分辨 气体放电 等离子体与物质作用 

分 类 号：O539[理学—等离子体物理]