OBSERVATION OF NON-QUASISTATIC PLASMA SURFACE WAVES.
Abstract
Surface waves have been launched from a waveguide onto a glassclad plasma column of moderate size (2 pi R = free space wavelength), in order to test the validity of quasistatic analysis when the small column condition (2 pi R < < free space wavelength) is not satisfied. Resonances were observed in an open microwave cavity, and dispersion of both the circularly-symmetric surface wave and the dipole surface wave has been determined from experimented data. The two waves exhibit regions of backward-wave and forward-wave propagation. The observed positive slope of the dipole mode dispersion curve near signal frequency/axial propagation constant = c is contrary to the predictions of quasistatic analysis, and is shown to agree quantitatively with the results of a more rigorous analysis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 25, 1965
- Accession Number
- AD0623122
Entities
People
- S. P. Schlesinger
- V. L. Granatstein
Organizations
- Columbia University