Results 211 to 220 of about 19,897 (263)
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Arcing voltage of the metal vapour vacuum arc
Journal of Physics D: Applied Physics, 1984Arcing voltage characteristics of metal vapour arcs in vacuum for seven metals (copper, aluminium, tin, magnesium, zinc, cadmium and bismuth) of high purity and low gas content have been investigated. These metals cover a fairly wide range of thermophysical parameters.
M S Agarwal, R Holmes
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Cathode Erosion in Vacuum Arcs and Unipolar Arcs
Beiträge aus der Plasmaphysik, 1981AbstractThe cathode spots from vacuum arcs on 316 stainless steel are compared with the tracks found on the same material after exposure to the plasma of the tokamak TFR 600. Further the erosion yields of vacuum arc cathodes of 316 stainless steel and titanium are determined from experiments and the measured values are compared with theoretical ...
Nuernberg, A. +3 more
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Retrograde arc spot motion in vacuum
Proceedings ISDEIV. 19th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.00CH37041), 2002Experiments are reported on the retrograde arc spot motion on copper cathodes in vacuum in the presence of a magnetic field. The spots are imaged with time and space resolution of
Jüttner, B., Kleberg, I.
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High Velocity Streams in the Vacuum Arc
Transactions of the American Institute of Electrical Engineers, 1934The high velocity streams of particles in the vacuum arc have been subjected to a detailed study, and the results are presented in this paper, together with a discussion of many of the phenomena involved. Experimental determinations of the relations between arc current, mass of condensed metal, electrodes, and velocity of the vapor stream are included.
E. C. Easton, F. B. Lucas, F. Creedy
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Computer simulation of ecton in a vacuum arc
IEEE Transactions on Dielectrics and Electrical Insulation, 1999The paper presents results of nonstationary two-dimensional hydrodynamic model of vacuum arc emission center-ecton. The numerical simulation was carried out for the initial stage of the operation of the ecton of a low-current vacuum arc on a copper cathode. It was shown that the current flows in the main through the edges of the emission center.
D.L. Shmelev, E.A. Litvinov
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Journal of Physics D: Applied Physics, 1979
The effective condensation coefficient for the ion flux coming from the cathode spot region of a vacuum arc will be influenced by sputtering. Calculations for a copper vacuum arc indicate that sputtering alone will limit the effective ion condensation coefficient to, at most, 0.94 or 0.80 for copper surfaces at anode or cathode potential, respectively.
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The effective condensation coefficient for the ion flux coming from the cathode spot region of a vacuum arc will be influenced by sputtering. Calculations for a copper vacuum arc indicate that sputtering alone will limit the effective ion condensation coefficient to, at most, 0.94 or 0.80 for copper surfaces at anode or cathode potential, respectively.
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From Field Emission to Vacuum Arc Ignition: A New Tool for Simulating Copper Vacuum Arcs
Contributions to Plasma Physics, 2015AbstractUnderstanding plasma initiation in vacuum arc discharges can help to bridge the gap between nano‐scale triggering phenomena and the macroscopic surface damage caused by vacuum arcs. We present a new twodimensional particle‐in‐cell tool to simulate plasma initiation in direct‐current (DC) copper vacuum arc discharges starting from a single ...
H. Timko +8 more
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Nature, 1967
IN an investigation of the cathode mechanism of the vacuum arc, in a vacuum of 10−5 torr, arc voltages were recorded for forty-one different cathode metals. Oscillographic measurements were made at the minimum stable arcing current over a period of 20 sec; values varied from 5 to 25 V.
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IN an investigation of the cathode mechanism of the vacuum arc, in a vacuum of 10−5 torr, arc voltages were recorded for forty-one different cathode metals. Oscillographic measurements were made at the minimum stable arcing current over a period of 20 sec; values varied from 5 to 25 V.
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Vacuum arc ion sources: Some vacuum arc basics and recent results (invited)
Review of Scientific Instruments, 1994Vacuum arc ion sources have been developed and used in a growing number of laboratories around the world. Primary applications of this high current metal ion source have evolved for metallurgical ion implantation and for accelerator injection. Novel source versions and features have been developed, including an electronically switchable ‘‘partitioned ...
Simone Anders, André Anders, Ian Brown
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Proceedings of the IEEE, 1973
This paper is a review of vacuum-arc phenomena which are related to switching devices. Despite the device overtones, the approach adopted for this paper is fundamental. Topics discussed include the drawn arc, the triggered arc, the power input to the cathode spot, cathode-spot division, arc stability, substructure of the cathode spot, dielectric ...
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This paper is a review of vacuum-arc phenomena which are related to switching devices. Despite the device overtones, the approach adopted for this paper is fundamental. Topics discussed include the drawn arc, the triggered arc, the power input to the cathode spot, cathode-spot division, arc stability, substructure of the cathode spot, dielectric ...
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