INVESTIGATION OF ELECTRONIC INTERACTION WITH OPTICAL RESONATORS FOR MICROWAVE GENERATION AND AMPLIFICATION.
Abstract
An analysis is presented for the interaction of a cylindrical electromagnetic resonator with a relativistic electron beam, where the beam orbits about the axis of the resonator under the influence of an axial dc magnetic field. It is shown that with a relativistic beam the most important cavity field for this interaction is the E sub phi field. Fairly strong synchronous interactions are predicted for TE sub n,1,1 resonators even for large values of n. Expressions are developed to give the strat oscillation current for a monotron oscillator using this interaction. Experimental oscillators employing the rotating beam interaction are described. Two of these were designed to operate with n = 10 at a wavelength of 4 mm. The experiments used beams ranging in voltage from 300 to 500 kV. The high voltage beams were obtained using cyclotron wave acceleration with an X-band TE sub 1,1,1 cavity accelerator driven by a magnetron power source. This method of obtaining the beam made high voltage power supplies unnecessary. One of the experimental oscillators operated successfully with output frequency ranging from the TE sub 6,1,1 resonance at 48.8 GHz to the TE sub 13,1,1 resonance at 96 GHz. Peak pulsed output powers of 50 watts were measured. The design of an experimental oscillator for a 337-micron wavelength (890 GHz) is described. This oscillator used a TE sub 119,1,1 resonator which was dielectrically loaded by means of a thin mica layer on the cavity wall. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0675509
Entities
People
- H. Jory