STUDY OF MICROWAVE GENERATION BY MEANS OF ELECTRON BEAM INTERACTION WITH ANISOTROPIC MEDIA.
Quarterly progress rept. no. 2, 1 Oct-31 Dec 63,
RAYTHEON CO WALTHAM MASS
Pagination or Media Count:
The interaction between electron beams and anisotropic media is investigated as a possible means of generating microwave energy. Two particular anisotropic materials being considered for the present study are plasmas and pyrolytic graphite. In the two parts the interaction of an electron beam with an annular plasma column is considered. Experimental work to determine the modes of propagation in an annular plasma column is now under way. Experimental apparatus and difficulties encountered in the construction of the discharge tube are described in Part I. No significant rf experiment has been carried out. In Part II, the electron-beam interaction with modes other than axially symmetric mode which might give rise to unwanted spurious oscillations is investigated theoretically. In Part III, results of the experimental work on waves in anisotropic resistive material Pyrographite are presented. The particular circuit being considered is a modified Karp line. The presence of the Karp-line mode has been established, but the attenuation of the mode due to the high conductivity of the material in the axial direction is found to be too great to make this type of circuit practical. Author