Accession Number : AD0700307

Title :   EXPERIMENTAL STUDY OF A HOLLOW-CATHODE ARGON ARC PLASMA.

Descriptive Note : Technical rept. Jul 66-Jun 68,

Corporate Author : AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Holt,James F. ; Boyer,Ellsworth L.

Report Date : SEP 1969

Pagination or Media Count : 30

Abstract : A set of coaxial cathode tubes produced a plasma having the same characteristics as the plasma from a tubular hollow cathode. Measurements of the plasma characteristics by microwave interferometry, plasma sweeper, Langmuir probe, and measurements made with a new plasma tool--a plasma scanner--showed that the plasma is nearly completely ionized at 10 to the 13th power/cc ion density. The electron beam, originating in the cathode, was detected by means of the scanner. The electrons in the beam attain energies as high as two-thirds of the arc voltage drop. The ion temperature of 6.9 electron volts, which was deduced from plasma sweeper measurements and diffusion theory, could result from directed ion drift; the electron temperature of the plasma is 3 electron volts. (Author)

Descriptors :   (*PLASMA GENERATORS, ELECTRIC ARCS), CATHODES, ELECTRON BEAMS, SCANNING, ARGON

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE