MEASUREMENT OF THE STARK WIDTHS AND SHIFTS OF NITROGEN ION LINES.
Abstract
A hot plasma composed of helium and ionized nitrogen was created by reflecting the shock wave produced in an electromagnetic T-tube. The plasma temperature was measured by monitoring three nitrogen ion lines, whose intensity is a steep function of temperature. The profiles of various lines emitted in the plasma were obtained by scanning a monochromator from shot to shot. The half width of HeI 3889A was compared to empirically corrected calculations to obtain the electron density. The half widths of the nitrogen ion lines were measured from the impact broadened profiles; the shifts were obtained by comparing these profiles with unshifted lines from a pulsed capillary discharge. The results indicate agreement between experiment and a recent Stark broadening theory within 20% except for lines originating from the 4f level where Debye screening effects are important. No evidence was found for plasma polarization shift. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1965
- Accession Number
- AD0617078
Entities
People
- Richard A. Day
Organizations
- University of Maryland