Momentum interchange between cathode-spot plasma jets and background gases and vapors and its implications on vacuum-arc anode-spot development

1990 ◽  
Vol 18 (2) ◽  
pp. 231-236 ◽  
Author(s):  
R.L. Boxman ◽  
S. Goldsmith
Keyword(s):  
Cathode Spot ◽  
Plasma Jets ◽  
Vacuum Arc ◽  
Anode Spot

Study of ion separation mechanism in the multi-component vacuum arc discharge

2021 ◽  
Author(s):  
Qiang Sun ◽  
Qianhong Zhou ◽  
Hantian Zhang ◽  
Wei Yang ◽  
Ye Dong ◽  
...  
Keyword(s):  
Heavy Ions ◽  
Cathode Spot ◽  
Arc Discharge ◽  
Fluid Model ◽  
Composite Cathode ◽  
Plasma Jets ◽  
Vacuum Arc ◽  
Separation Mechanism ◽  
Ion Separation ◽  
Light Ions

Abstract The separation phenomenon of light and heavy ions was widely observed experimentally in the vacuum arc discharge with multi-component composite cathode. In this work, a two-dimensional axisymmetric multi-fluid model is used to study the separation mechanism in the multi-component composite cathode vacuum arc. The multi-component vacuum arcs are simulated as a whole which includes separate cathode spot jets, the mixing region, and common arc column. The results show that the plasma jets originated from the separate cathode spot mix together to form a common arc column after a certain distance from the cathode. Due to the rapid increase of ion temperature dozens of times in mixing region of cathode spot jet, the effect of pressure gradient becomes far greater than that of the collisions between light and heavy ions. This leads to a shift in the predominant ion motion mechanism from ion-ion collision (single cathode spot jet region) to pressure expansion (the mixing region). Finally, the light ions gain higher velocities under pressure expansion. In addition, the effect of thermal conductivity and viscosity leads to the wider high temperature regions for light ions, thus making a wider distribution of corresponding ion flux. The numerical results are qualitatively consistent with the experimental results. This paper provides an insight into ion separation mechanism in the multi-component vacuum arc.

The cathode spot of a vacuum arc

1978 ◽  
Vol 125 (8) ◽  
pp. 665-706 ◽  
Author(s):  
G.A. Lyubimov ◽  
V.I. Rakhovskii
Keyword(s):  
Cathode Spot ◽  
Vacuum Arc

Energy Balance on Current Density Distribution of Cathode Spot in Vacuum Arc

2019 ◽  
Vol 139 (5) ◽  
pp. 302-308 ◽  
Author(s):  
Shinji Yamamoto ◽  
Soshi Iwata ◽  
Toru Iwao ◽  
Yoshiyasu Ehara
Keyword(s):  
Energy Balance ◽  
Density Distribution ◽  
Current Density ◽  
Cathode Spot ◽  
Current Density Distribution ◽  
Vacuum Arc

Study of formation mechanism of double metal plasma jets in a low-current pulsed vacuum arc discharge

2021 ◽  
Vol 33 (3) ◽  
pp. 037103
Author(s):  
Jia Tian ◽  
Wenzheng Liu ◽  
Wenjun Zhang ◽  
Xitao Jiang
Keyword(s):  
Formation Mechanism ◽  
Arc Discharge ◽  
Plasma Jets ◽  
Vacuum Arc ◽  
Metal Plasma

Cathode spot motion in vacuum arc of zinc cathode under oxygen gas flow

2001 ◽  
Vol 29 (5) ◽  
pp. 713-717 ◽  
Author(s):  
R. Miyano ◽  
Y. Fujimura ◽  
H. Takikawa ◽  
T. Sakakibara ◽  
M. Nagao
Keyword(s):  
Cathode Spot ◽  
Gas Flow ◽  
Vacuum Arc ◽  
Oxygen Gas ◽  
Spot Motion

scholarly journals Simulation of vacuum arc cathode spot movement between transverse magnetic field contacts

AIP Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 015324
Author(s):  
Hao Jing ◽  
Junfei Yang ◽  
Xianhai Pang ◽  
Shixin Xiu
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic Field ◽  
Cathode Spot ◽  
Transverse Magnetic ◽  
Vacuum Arc

scholarly journals Retrograde Motion Velocity of Graphite Cathode Spot in Vacuum Arc Deposition Apparatus

1994 ◽  
Vol 114 (2) ◽  
pp. 117-122
Author(s):  
Ryuichi Miyano ◽  
Hirofumi Takikawa ◽  
Tateki Sakakibara ◽  
Yasuo Suzuki
Keyword(s):  
Cathode Spot ◽  
Vacuum Arc ◽  
Motion Velocity ◽  
Graphite Cathode ◽  
Retrograde Motion ◽  
Vacuum Arc Deposition ◽  
Arc Deposition
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