INTERACTION OF ELECTROMAGNETIC WAVES AND CLASSICAL PLASMAS.
Abstract
The crossed-beam, cross modulation microwave plasma diagnostic technique is examined on the basis of average electron theory. One microwave beam is used to heat a selected portion of a plasma. This beam is amplitude modulated and produces a modulation of the plasma conductivity. A second steady beam is directed through the plasma and as a result of the heating produced by the first beam is modulated. The resulting signal is dependent only on the properties of the plasma in the region of intersection of the two beams. Tables of propagation constant versus electron density and collision frequency were prepared and expressions for the differential propagation constant were derived. Several methods for making an unambigious determination of the electron density and collision frequency are outlined. Various detection schemes and bridge arrangements are examined. A heterodyne detector with a large dynamic range appears necessary for successful measurement of the cross modulation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 26, 1963
- Accession Number
- AD0439831