Accession Number : AD0623971

Title :   MEASUREMENT OF PLASMA DENSITIES BY VACUUM ULTRAVIOLET ABSORPTION SPECTROSCOPY.

Descriptive Note : Technical information series,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : Gloersen,P. ; Collins,S. F.

Report Date : NOV 1965

Pagination or Media Count : 18

Abstract : Plasma densities are usually measured by determining the electron densities by a variety of techniques. Under certain circumstances, it is desirable also to know the identities of the associated ions as well as their densities and location relative to the electrons and to know what and how many neutral atoms and molecules are present. A straightforward means of accomplishing this at least qualitatively is through vacuum ultraviolet absorption spectroscopy, since most ions, atoms, and molecules have their resonance absorption spectrum lines in this region. Quantitative measurements require the knowledge of oscillator strengths and line shapes for the respective resonance lines. Such knowledge is by no means complete, but enough information is available to make this technique a useful one. The general considerations in applying this technique are discussed, along with a numerical example using the 1470A resonance line of xenon. (Author)

Descriptors :   (*PLASMAS(PHYSICS), DENSITY), (*ABSORPTION, PLASMAS(PHYSICS)), (*ULTRAVIOLET SPECTROSCOPY, PLASMAS(PHYSICS)), VACUUM, ELECTRON DENSITY, XENON, RESONANCE ABSORPTION

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE