Electric lamp and discharge devices: systems – Discharge device load – Electromagnetic influenced discharge device
Patent
1988-06-16
1991-05-28
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Discharge device load
Electromagnetic influenced discharge device
313162, 31323141, 313311, 313351, 31511101, H01J 132, H01J 1714, H01J 1502
Patent
active
050197525
ABSTRACT:
A plasma switch employs a cold cathode which yields secondary electrons to sustain a plasma within the switch. The cathode is provided with a series of perturbations which increase the effective cathode surface area exposed to the plasma and increase the average effective path lengths of secondary electrons emitted from the cathode and the probability of such electrons having ionizing collisions with gas molecules within the switch. The interior cathode surface is provided with a coating formed from chromium or a chromium mixture. Chromium combines a high rate of secondary electron emission with low sputtering and other advantageous properties for plasma switch operation. Various types of chromium-plated perturbations are described.
REFERENCES:
patent: 1872359 (1927-10-01), Sutherlin
patent: 3596131 (1971-07-01), Wilczek
patent: 4247804 (1981-01-01), Harvey
patent: 4394622 (1983-07-01), Rink
patent: 4596945 (1986-06-01), Schumacher et al.
patent: 4611147 (1986-09-01), Hatch et al.
Schumacher et al., "Low-Pressure Plasma Opening Switches", chapter in text edited by Guenther et al., Opening Switches, Plenum Publishing Corp., 1987, pp. 93-129.
Caron, "A Helium Plasma Simulator", Proceedings of the IEEE, vol. 59, No. 4, Apr. 1971, pp. 608-613.
Goldberg et al., "Hydrogen Thyratrons", chapter in Advances in Electronics and Electron Physics, ed. L. Morton, vol. XIV, Academic Press, 1961, pp. 207-219.
Alessi et al., "Regular and Asymmetric Negative Ion Magnetron with Grooved Cathodes", Rev. Sci. Instrum., vol. 51, No. 12, Dec., 1980, pp. 1630-1633.
Stipp et al., "A Brighter H.sup.- Source for the Intense Pulse Neutron Source Accelerator System", IEEE Transactions on Nuclear Science, vol. NS-30, No. 4, Aug. 1983, pp. 2743-2745.
Martinelli, "Effects of Cathode Bumpiness on the Spatial Resolution of Proximity Focused Image Tubes", Applied Optics, vol. 12, No. 8, Aug. 1973, pp. 1841-1845.
P. R. Caron, "Plasma Generation Using a Large V-Groove Cathode Discharge", Appl. Sci. Res. 23, Mar. 1971, pp. 409-425.
James G. Alessi, "A Circular Aperture Magnetron for Injection into an RFQ", American Institute of Physics Conference Proceedings No. 158, Particles and Fields Series 35, Production and Neutralization of Negative Ions and Beams, Fourth International Symposium, Brookhaven, N.Y., 1986, pp. 419-424.
C. W. Schmidt et al., "Operation of the Fermilab H.sup.- Magnetron Source", American Institute of Physics Conference Proceedings No. 158, Particles and Fields Series 35, Production and Neutralization of Negative Ions and Beams, Fourth International Symposium, Brookhaven, N.Y., 1986, pp. 425-429.
R. L. Witkover, "Operational Experience with the BNL Magnetron H.sup.- Source", American Institute of Physics Proceedings, 1984, pp. 398-409.
J. R. Hechtel et al., "A Dual Mode Electron Gun Having Non-Intercepting Grids", International Electron Devices Meeting Technical Digest, 1973, pp. 171-174.
B. B. Baker, "High Efficiency Emission Mechanisms in Not Cathode Low Pressure Discharges", International Journal of Electronics, vol. 25, No. 1, 1968, pp. 49-56.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
LaRoche Eugene R.
Shingleton M.
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