ANALYSIS OF IONS EXTRACTED FROM A PLASMA PUFF IN MAGNETIC GUIDE FIELDS.
Abstract
An iron skimmer and an extractor tube were used to extract ions from a high-beta plasma puff as it traveled down B sub z and octopole magnetic guide fields. The plasma puff was generated by a theta-pinch plasma gun operating with hydrogen. The extracted ions were analyzed with a cross-field velocity analyzer in series with an electrostatic energy analyzer. For the case of the octopole guide field, analysis of the energy spectrum yielded values for the plasma parameters in good agreement with other determinations. For the B sub z guide field, the magnetic field trapped in the extraction apparatus produced a magnetic barrier that reflected the plasma so as to distort the energy spectrum and produced temperature estimates that were too high and density estimates that were too low. However, for the B sub z guide field, an upper limit could be placed on the concentration of impurity ions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0707346
Entities
People
- C. S. Leffel Jr.
Organizations
- Johns Hopkins University Applied Physics Laboratory