Competition Between Electromagnetic Modes in a Free-Electron Maser
Final technical rept. 1 Mar 1990-28 Feb 1994
UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
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A three part report is presented describing the mode competition in a gyrotron oscillator with two competing electromagnetic modes. Part I gives the theory of this mode coupling is presented using a quasi-linear assumption which is valid for small power levels. The results are interpreted in terms of the phase plane. These general results are applied to a specific case of mode competition, that between TE101 and TE011 modes in a cavity of rectangular cross section. Part II presents the theory of coupling which amy occur between any number of cavity modes through finite conductivity in the cavity walls, holes in the conducting cavity walls, or though interaction with an electron beam. Part III details the experimental work. The electrodynamic circuit is described as are microwave and electron beam diagnostics. Results of initial tests are also given.
- Electrical and Electronic Equipment
- Lasers and Masers
- Electricity and Magnetism