Preliminary Langmuir Probe Study of Argon Plasma in a Hollow, Hot Oxide Cathode Using Second Derivative Diagnostic Techniques.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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A plasma facility was constructed to perform a preliminary study of argon plasma with a movable Langmuir probe inside a hot oxide cathode using second derivative diagnostic techniques. The discharge conditions were pressure about 0.248 Torr, constant discharge current about 430 milliamps, and heater current about 5.9 amperes. Plasma measurements were taken radially and profiles of the temperature and number density of low-energy electrons and the potential distribution obtained. Strong variations in number density with variations in plasma potential were found. The electron spectrum consisted of three distinct energy groups with the bulk of plasma ions being produced by direct ionization. Author
- Electrical and Electronic Equipment
- Plasma Physics and Magnetohydrodynamics