Langmuir Probe Diagnostics in the ELMAX Plasma Device.
Abstract
Cylindrical Langmuir probes were used to determine quiescent plasma conditions and instability thresholds in a mirror geometry magnetoplasma experiment (ELMAX). Radial profiles of electron temperature, density, and velocity distribution were measured in an argon plasma maintained by two magnetic annular arc sources. A digital data recording system was devised which facilitated reduction of the probe curves with a computer program using collisionless probe theory. For magnetic fields below 400 gauss the peak values of electron temperature and density were 40,000 degrees K and 10 to the 13th power/cc respectively, and observed density oscillations were less than 5%. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1971
- Accession Number
- AD0726990
Entities
People
- James R. Nunn
Organizations
- Air Force Institute of Technology