Accession Number : ADD015956

Title :   High-Power Gas Switch with Hydride Electrodes.

Descriptive Note : Patent, filed 6 Nov 91, patented 3 Aug 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hutcherson, R K ; Moran, Stuart L

Report Date : 03 Aug 1993

Pagination or Media Count : 6

Abstract : A high-power, high-repetition-rate spark gap switch having metal-hydride electrodes is provided The spark gap switch is configured with a trigger and two electrodes fabricated with metal hydrides. The hydride metals may be selected from a variety of alloys including iron, nickel, magnesium, and palladium based alloys. Use of these alloys for fabrication of the electrodes permits hydrogen to be absorbed into the electrode material at a density approximately that of liquid hydrogen. During operation of the switch, the increasing temperature causes hydrogen to be desorbed into cavity surrounding the switch. Whereas the increasing temperature lowers the breakdown voltage of the switch, the increasing pressure raises the breakdown voltage The result is the switch operates at a constant breakdown voltage independent of temperature.

Descriptors :   *ELECTRODES, *HIGH POWER, *HYDRIDES, *SPARK GAPS, *SWITCHES, *PATENTS, *GASES, CAVITIES, CONSTANTS, DENSITY, FABRICATION, HYDROGEN, LIQUID HYDROGEN, MATERIALS, METALS, OPERATION, POWER, PRESSURE, REPETITION RATE, TEMPERATURE, VOLTAGE, IRON ALLOYS, NICKEL ALLOYS, MAGNESIUM ALLOYS, PALLADIUM ALLOYS, DESORPTION, BREAKDOWN(ELECTRONIC THRESHOLD)

Subject Categories : Physical Chemistry
      Combustion and Ignition
      Properties of Metals and Alloys
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE