Accession Number : AD0666155

Title :   STREAM EMISSION OF METALLIC PLASMA IN A VACUUM,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Chekalin,E. K. ; Shumanov,V. S.

Report Date : 18 AUG 1967

Pagination or Media Count : 14

Abstract : In order to obtain streams of a metal plasma, use was made of the evaporation of the substance of the electrodes in a pulsed high-current discharge, followed by electrodynamic acceleration of the plasma formed. Analysis of the emission spectrum of the plasma in the visible region by means of an ISP-51 spectrograph showed the presence of the lines of the alkali metal employed, two hydrogen lines, and two lines of copper and sodium. Oscillograms of the glow intensity of the various spectral emission lines showed the plasma stream to be made up of individual plasmoids corresponding to the periodic ejections of plasma from the plasma gun. Some time-averaged parameters of the plasma streams of the alkali metal were measured. It is shown that the averaging of the plasma parameters over a time interval of 100 microsec is fully justified: the experimentally determined average values of the plasma parameters should then be close to the true values. The study of the discharge of a metal plasma into a vacuum shows that such plasma jets can be used for investigating processes of heat transfer from the plasma stream to a solid wall and for various aerodynamic studies in plasmas. (Author)

Descriptors :   (*PLASMA JETS, EMISSIVITY), VAPORIZATION, LINE SPECTRA, ELECTRODES, COPPER, SODIUM, HYDROGEN, PLASMA ACCELERATORS, VACUUM, USSR

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE