Electric lamp and discharge devices: systems – Discharge device load with fluent material supply to the... – Plasma generating
Patent
1994-06-30
1997-12-23
Pascal, Robert
Electric lamp and discharge devices: systems
Discharge device load with fluent material supply to the...
Plasma generating
31511151, 118723E, 118723R, 156345P, 31323131, H01J 3700
Patent
active
057010579
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to the electrical engineering and more particularly to methods of obtaning an electric discharge and to devices for effecting the same.
PRIOR ART
At present interest has been aroused in effects of the high energy on metallic surfaces. Widely known are effects of the high energy generated by lasers. However, the use lasers is a substantially complicated problem involving the the need for the additional costly equipment.
More simple means for utilizing the high-energy effect on metallic surfaces reside in methods of obtaining an electric discharge and in devices for effecting the same.
Known in the prior art is a method of obtaining an electric discharge (J. M. Lafferty, Editor, Vacuum Arcs. Theory and Application. 1. J. D. Cobine, Introduction to Vacuum Arcs. 1.3. General Characteristics of the Vacuum Arcs. 3. G. A. Farrall, Arc Ignition Processes. 3.3. The Triggered Vacuum Arc, 1980, by John Wiley and Sons, Inc., pp. 5-8, 107-119) by way of setting up a voltage across an anode and cathode, by buiding up and maintaining around the anode and cathode a reduced pressure of gases or their mixtures corresponding to a diffusion rate of the electric discharge in the anode region, initiating and maintaining in the gap between the cathode and anode an electric discharge with cathode spots and with the formation of a plasma-forming substance from products of erosion of the cathode surface and the plasma, and an arbitrary scanning by the cathode spots of the entire surface of the cathode up to the termination of the electric discharge.
In the given method the plasma-forming substance is obtained from the products of erosion of the cathode material and the arbitrary scanning by the cathode spots is accomplished repetitively over the entire surface of the cathode up to a forced termination of the electric discharge.
Also known in the prior art is a device of obtaining an electric discharge (J. M. Lafferty, Editor, Vacuum Arcs. Theory and application. 1. J. D. Cobine, Introduction to Vacuum Arcs. 1.3. General Characteristics of the Vacuum Arcs. 3. G. A. Farrall, Arc Ignition Processes. 3.3. The Triggered Vacuum Arc, 1980, by John Wiley and Sons, Inc., pp. 5-8, 107-119), comprising a vacuum chamber accommodating an anode and cathode, main and auxiliary current leads electrically associated with the anode and cathode respectively, triggering electrodes disposed in the immediate vicinity of the cathode, a means for ordering the movement of the cathode spots affecting the gap between the anode and cathode, and a power supply source installed outside of the vacuum chamber and electrically associated with the main and auxiliary current leads, and an electric discharge triggering unit electrically associated with the triggering electrodes. In the given device the anode is substantially flat in shape and the cathode surface facing the anode is represented by the cathode material itself, and a magnetic field generator is used as a means for ordering the movement of the cathode spots.
However, in the given method and the device for effecting the same the anode construction requires an uninterrupted formation of a plasma-forming substance and a means for maintaining the electric discharge in the gap between the anode and cathode, the cathode material is used as a surface of the cathode, and the use of the magnetic field generator leads to an unsatisfactory regulation of the movement of the plasma-forming substance which involves the use of a high-current electric discharge and which in turn leads to losses of metal caused by sublimation.
Also in the given method and the device for effecting the same, a repeated and arbitrary scanning by the cathode spots of the entire surface of the cathode leads to a random thermal effect on the cathode surface which impairs the physicochemical properties of the cathode surface.
DISCLOSURE OF THE INVENTION
The invention is essentially aimed at providing a method of obtaining an electric discharge wherein the proposed changes in operations
REFERENCES:
patent: 3471733 (1969-10-01), GE Company
patent: 3509404 (1970-04-01), GE Company
patent: 3509405 (1970-04-01), GE Company
patent: 3509406 (1970-04-01), Rich
patent: 4492845 (1985-01-01), Kijuchko et al.
patent: 5451308 (1995-09-01), Sablev et al.
J.M. Lafferty, Editor, Vacuum Arcs. Theory and Application.
Djuzhev Georgy Andreevich
Gerasimov Jury Vasilievich
Grinberg Jury Moiseevich
Kallistov Anatoly Anatolievich
Kurilenko Vladimir Iliich
Kinkead Arnold
Pascal Robert
Rossisko-shveitsarskoe aktsionernoe obschestvo zakrytogo tipa "N
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