A Theoretical and Experimental Investigation of Langmuir Probes in a Collision Dominated Quiescent Discharge.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
Pagination or Media Count:
The Langmuir probe theories of Su and Lam and of Self and Shih for collisional plasmas were examined theoretically and compared with experimental results. Probe measurements were made in helium, in nitrogen, and in argon discharges for which the pressures were between .480 and 1.200 Torr. Three discharge tube configurations and both spherical and cylindrical probes were used. To analyze measurements from cylindrical probes, an approximate ellipsoidal geometry theory was formulated and used. Spherical geometry probe data was analyzed with a technique derived from the Self and Shih theory. It was found that probe currents were not always large enough. Author
- Test Facilities, Equipment and Methods
- Plasma Physics and Magnetohydrodynamics