APPLICATION OF A MICROWAVE TECHNIQUE TO THE MEASUREMENT OF ELECTRON DENSITY AND RELAXATION TIME.
Abstract
The measurement of ionization rate, electron density and ionization relaxation time in thermally ionized gases, by means of a microwave technique is discussed. The technique used in this work utilizes a so-called end wall microwave resonant cavity. It is essentially a microwave cavity operated in the TE011 mode with a plasma forming one end wall. Since the resonant frequency of such a cavity is a function of the axial length of the cavity, a variable density plasma with its corresponding variable conductivity is utilized to tune the cavity to different resonant frequencies. It is shown that by applying two frequencies to the cavity separated from each other by a known delta f, which is small compared to the resonant frequency of the closed cavity, a simple method is arrived at to measure electron density, ionization rate and ionization relaxation time. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0484066
Entities
People
- Edward F. Dawson
- Samuel Lederman
Organizations
- New York University Tandon School of Engineering