Accession Number : AD0733329

Title :   Experimental Investigation of the Breakdown Strength of a Mercury-Cesium Colloid,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DIV OF SPONSORED RESEARCH

Personal Author(s) : Daurio,Alan Pasquale

Report Date : AUG 1971

Pagination or Media Count : 58

Abstract : An investigation of the breakdown strength of a mercury-cesium vapor undergoing condensation in the presence of helium was performed, using parallel wires as electrodes. An expression was derived which allowed the experimentally determined voltage to be related to the breakdown voltage for plane parallel electrodes. The breakdown relations thus derived were experimentally verified for Heg gas and air. Measurements were made at pressures of the order of half an atmosphere and for an electrode gap of the order of one millimeter. The breakdown voltage of the mercury-cesium colloid was found to depart considerable from the values for Heg. These departures were attributed to a high concentration of mercury in the early part of the experimental run, a velocity effect and Penning ionization of cesium atoms by matastable mercury atoms. The breakdown voltage ranged from a high of 732 volts to a low of 293 volts. The effect of condensation droplets was found to be a negligible contribution in the range investigated. (Author)

Descriptors :   (*GAS DISCHARGES, ELECTRICAL CORONA), (*PLASMA GENERATORS, ELECTRIC FIELDS), GAS IONIZATION, IONIZATION POTENTIALS, HELIUM, CESIUM, MERCURY, VAPORS, ELECTRON DENSITY, SUPERSONIC NOZZLES, COLLOIDS, CONDENSATION, CURVE FITTING, ELECTRIC POWER PRODUCTION

Subject Categories : Electric Power Production and Distribution
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE