DIAGNOSTIC MEASUREMENTS ON A REFLEX ARC PLASMA COLUMN.
Abstract
Diagnostic measurements utilizing a single Langmuir probe were made on an Argon plasma with the plasma facility operating in the reflex arc configuration. A measuring technique was developed which allowed the use of an X-Y recorder to plot probe voltage versus probe current continuously as the biasing voltage on the probe was swept from -60 volts to +120 volts, the plasma potential being approximately +100 volts. The area of principal interest in the reduction of the data was the Argon ion density. Densities were found to vary radially from the center of the plasma beam and this radial variation in turn varied with the applied magnetic field. A typical density, 10 mm from the center of the beam with a magnetic field strength of 3,000 gauss, was found to be 8.1 x 10 to the 11th power particles/cc. Densities ranged from 0.3 x 10 to the 11th power particles/cc at a magnetic field strength of 4,980 gauss and a probe distance of 40 mm to 29.0 x 10 to the 11th power particles/cc at a magnetic field strength of 7,020 gauss and a probe distance of 5 mm. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0475385
Entities
People
- Dan R. Mcdaniel
Organizations
- Naval Postgraduate School