Ion flux from the cathode region of a vacuum arc

1989 ◽  
Vol 17 (5) ◽  
pp. 688-694 ◽  
Author(s):  
J. Kutzner ◽  
H.C. Miller
Keyword(s):  
Cathode Region ◽  
Ion Flux ◽  
Vacuum Arc

Ion Flux from the Cathode Region of a Vacuum Arc

1991 ◽  
Vol 31 (3) ◽  
pp. 261-277 ◽  
Author(s):  
H. Craig Miller ◽  
J. Kutzner
Keyword(s):  
Cathode Region ◽  
Ion Flux ◽  
Vacuum Arc

A Microscopic Study of Before-Arc Process in Metal Vapor Plasmas Proximal Cathode Region. Part I Formation of the Proximal Cathode Region

2013 ◽  
Vol 325-326 ◽  
pp. 1339-1342
Author(s):  
Jing Li ◽  
Qiu Ting Yu ◽  
Yun Dong Cao ◽  
Xiao Ming Liu ◽  
Chong Xu
Keyword(s):  
Theoretical Study ◽  
Charged Particles ◽  
Metal Vapor ◽  
Particle Energy ◽  
Cathode Region ◽  
Plasma Sheath ◽  
Vacuum Arc ◽  
Anode Surface ◽  
Necessary Condition ◽  
Complex Phenomena

Metal vapor arc in vacuum breaker is a very complex phenomena and the researches on the process of arc creating are the effective method to improve breaking ability. By the theoretical study and numerical simulation, exploring the formation of plasma sheath near the cathode, charged particles energy distribution and influence elements in before-arc process are the fundamentals of this paper. Before-arc process is the fundermental of arc energy and the proximal cathode region is the important area for vacuum arc forming, so before-arc process of metal vapor arc was simulated here. The modification to electron motion produced by the interaction between charged particles and plane electrodes and both elastic and charge exchange collisions between electrons and neutral gases were considered here. The copper cross section adopted here was related to the particle energy. The tracks of electrons were traced until they reached to the anode surface. Based on this method, the formation of proximal cathode region and some microscopic parameters were simulated here. The results show that the collision between charged particles with the electrodes is the necessary condition in proximal cathode regions formation.

scholarly journals Vacuum Arc Ion Flux From Vacuum Interrupter Contact Gap

2017 ◽  
Vol 4 (2) ◽  
pp. 186-189
Author(s):  
M. Kurrat
Keyword(s):  
Layer Thickness ◽  
Metal Layer ◽  
Transport Processes ◽  
Ion Flux ◽  
Vacuum Arc ◽  
Ceramic Surface ◽  
Metal Vapour ◽  
Particle Tracing ◽  
Final Particle ◽  
Dielectric Performance

Dielectric properties of vacuum interrupters are influenced by metal vapour deposition on the inner ceramic surfaces. Therefore these surfaces are partly protected by shield electrodes. The metal vapour originates from the vacuum arc in the contact gap during switching off process. Metal layer thickness on ceramics after switching operations were measured by Gramberg and the negative effect on dielectric performance was demonstrated. In this paper we address the principle transport process of metal vapour in vacuum interrupters. Duning and Beilis performed ion flux measurements from vacuum arcs. We regard experiments with 5 kA effective arc current. There seems to be experimental evidence that the final particle transport onto the ceramic surface within a shield gap can be explained by particle tracing. The measured deposited layer thickness is taken as quantity to validate vapour densities and transport processes in vacuum interrupters.

scholarly journals Measurements of the total ion flux from vacuum arc cathode spots

2005 ◽  
Vol 33 (5) ◽  
pp. 1532-1536 ◽  
Author(s):  
A. Anders ◽  
E.M. Oks ◽  
G.Yu. Yushkov ◽  
K.P. Savkin ◽  
I.G. Brown ◽  
...  
Keyword(s):  
Ion Flux ◽  
Vacuum Arc
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