Theory of Anode Region of Short High-Current Vacuum Arc

Londer, Yakov I.; Ul’yanov, K. N.

doi:10.1109/tps.2013.2244102

Cited by 5 publications

References 4 publications

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Investigation on anode modes of vacuum arc under different contact opening speeds

Wang

Zhang

et al. 2022

Physics of Plasmas

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This paper aims to investigate the anode modes of vacuum arc at different opening speeds, especially at a high opening speed that exceeds 3 m/s. The butt contacts made of CuCr30 and CuCr50 with a diameter of 15 mm are used. Experiments are conducted at the current of 3.3, 4.4, 5.5, and 6.3 kA with a frequency of 50 Hz. An electromagnetic repulsion actuator provides the average opening speed from 1.7 to 3 m/s. The experimental results show that the number of droplets splashing into electrodes increases as the arc current increases, while a higher opening speed decreases the droplets. A higher opening speed will reduce the transferred charge before the anode spot type 2, and a higher Cr content increases the transferred charge before the anode spot type 2. Increasing opening speed will decrease the starting time of anode spot type 2, but it increases the gap distance when anode spot type 2 appears. Meanwhile, the increase in Cr content delays the formation of anode spot type 2.

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Investigation on anode modes of vacuum arc under different contact opening speeds

Wang

Zhang

et al. 2022

Physics of Plasmas

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On the anode potential fall in a vacuum arc: PIC simulation

Shmelev¹,

Barengolts²,

Tsventoukh³

2014

Plasma Sources Sci. Technol.

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The interaction of plasma generated by a vacuum arc with the anode surface was numerically simulated by using a particle-in-cell (PIC) method. It has been found that the anode potential fall remains negative even at high electron drift velocities. The plasma-anode-surface interaction has been analyzed for a 'steady-state' regime and for a 'turbulent' regime with microinstabilities developing in the plasma. For the steady-state regime, approximate formulas for the anode potential fall and energy flux have been derived from the simulation results. For the turbulent regime, naturally associated with high electron drift velocities, the negative anode fall voltage and the effective plasma electron temperature have been found to be larger than that for the steady-state regime.

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