Accession Number : AD0715883

Title :   Volume Ionization by Means of Laser Radiation in a Cesium Plasma Diode,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Oettinger,Peter E. ; Dewey,C. Forbes , Jr

Report Date : 30 SEP 1970

Pagination or Media Count : 43

Abstract : The paper considers the possibility of enhancing neutralization of the interelectrode space charge in a cesium diode by the use of line radiation. Ionization results from a two-step process. The neutral cesium atoms are first raised to an excited electronic level by line radiation (typically from a solid-state laser). The excited neutrals, being within a few kT of the continuum, are then collisionally ionized by plasma electrons. A detailed consideration of the optical excitation cross sections and electron-neutral collision cross sections for the highly excited states suggests that plasma densities of 10 to the 15th power/cc can be produced. The thermal economics of this system appear to be attractive when compared to contact ionization and collisional ionization and collisional ionization as well as previously proposed schemes employing radiation. (Author)

Descriptors :   (*PLASMA MEDIUM, IONIZATION), (*CESIUM, *GAS IONIZATION), GAS DISCHARGES, DIODES, LASERS, CESIUM, THERMIONIC CONVERTERS, ELECTRON DENSITY, ATOMIC ENERGY LEVELS, EXCITATION, OPTICAL PUMPING

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE