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plasma Density Measurements in cable gun Experiments with a Sensitive He-Ne Interferometer

plasma Science and Technology 2007年第3期9卷 292-295页

作者：陈林何安姜巍徐敏吴守东李晔 Institute of Fluid Physics Chinese Academy of Engineering PhysicsMianyang 621900China

A time-resolved sensitive He-Ne laser interferometer without complicated active stabilization was built up and applied to low-density plasma measurements. A precision of about 0.2° in phase measurements was achieved with a minimum line-integrated plasma density as low as 8.3× 10^13 cm^-2. With this interferometer, the characteristics of the plasma generated by a cable plasma gun was investigated systematically. The reproducibility, spatial and temporal distributions and the averaged injection velocity of the plasma are presented. In addition, the interaction of the plasma flow with a conductor was studied by placing a metal plate in the downstream of the cable gun.

关键词： plasma opening switch interferometer plasma density cable plasma gun

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维普期刊数据库

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Study on Performance Parameters of the plasma Source for a Short-Conduction-Time plasma Opening Switch

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plasma Science and Technology 2012年第12期14卷 1116-1120页

作者：罗维熙曾正中王亮平雷天时呼义翔黄涛孙铁平 Northwest Institute of Nuclear Technology

plasma source performance parameters, including plasma ejection density and velocity, greatly affect the operation of a short-conduction-time plasma opening switch （POS）. In this paper, the plasma source used in the POS of Qiangguang I generator is chosen as the study object. At first the POS working process is analyzed. The result shows that the opening performance of the POS can be improved by increasing the plasma ejection velocity and decreasing the plasma density. The influence of the cable plasma gun structure and number on the plasma ejection parameters is experimentally investigated with two charge collectors. Finally a semi-empirical model is proposed to describe the experimental phenomenon.

关键词： POS cable plasma gun plasma density and ejection velocity arc model

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维普期刊数据库

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plasma density evolution in plasma opening switch obtained by a time-resolved sensitive He-Ne interferometer

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Science China(Physics,Mechanics & Astronomy) 2014年第3期57卷 442-446页

作者： CHEN Lin REN Jing GUO Fan ZHOU LiangJi LI Ye HE An JIANG Wei Institute of Fluid Physics China Academy of Engineering Physics College of Physics Huazhong University of Science & Technology

To understand the formation process of vacuum gap in coaxial microsecond conduction time plasma opening switch(POS),we have made measurements of the line-integrated plasma density during switch operation using a time-resolved sensitive He-Ne *** conduction current and conduction time in experiments are about 120 kA and 1 s,*** a result,more than 85%of conduction current has been transferred to an inductive load with rise time of 130 *** radial dependence of the density is measured by changing the radial location of the line-of-sight for shots with the same nominal POS *** the conduction phase,the line-integrated plasma density in POS increases at all radial locations over the gun-only case by further ionization of material injected from the *** current conduction is observed to cause a radial redistribution of the switch plasma.A vacuum gap forms rapidly in the plasma at 5.5 mm from the center conductor,which is consistent with the location where magnetic pressure is the largest,allowing current to be transferred from the POS to the load.

关键词： plasma opening switch interferometer plasma density cable plasma gun

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维普期刊数据库

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