Ion and Neutral Drifts in the Hollow Cathode Discharge Tube,
Abstract
A two-channel Fabry-Perot interferometer for the measurement of very small displacements of spectral lines has been constructed. Advantage is taken both of the superior throughput and resolution of the Fabry-Perot. The two-channel operation is produced by the use of two concentric polarizers and a rotating analyzer. Application is made to the study of the alkaline earths, barium and strontium, in a helium filled Schuler hollow cathode plasma. The applicability of alkaline earth tracers to determine volume pressure force and electric field strength in the cathode glow is studied. The observed ion drifts are related to electron field strength through mobility. The results indicate maximum of electric field strength of about 0.5 v/cm at 1 torr for both Ba and Sr, and a neutral drift toward the anode inversely proportional to pressure for Ba. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1971
- Accession Number
- AD0724160
Entities
People
- Walter I. Fried
Organizations
- University of Miami