Effects of modulated electron beams and cavities on reditrons

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6907706

Kwan, T J.T.; Davis, H A; Fulton, R D; Sherwood, E G

The virtual cathode, when formed in a cavity, can generate microwaves at different cavity modes depending on the geometry of the cavity. We found that the formation and the oscillation frequency of the virtual cathode in a reditron can be significantly influenced by cavity designs. The length of a cavity can play a role in frequency and mode selection. Our simulations showed that TM/sub 012/ and TM/sub 033/ were excited for cavity lengths of 15.0 cm and 22.5 cm, respectively. In addition to the cavity effects on reditrons, we discovered that highly modulated electron beams can be produced in reditrons. Full modulation (100/percent/) of the transmitted electron beam current has been confirmed in our simulations. We further showed that incorporation of an inverse diode configuration can achieve microwave production efficiency of 26/percent/. 11 refs., 8 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6907706
• Report Number(s): LA-UR-88-2189; CONF-880713-10; ON: DE88014317
• Country of Publication: United States
• Language: English

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
CAVITY RESONATORS
EFFICIENCY
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY MODULATION
LEPTON BEAMS
MATHEMATICAL SPACE
MICROWAVE EQUIPMENT
MODULATION
PARTICLE BEAMS
PHASE SPACE
PRODUCTION
RESONATORS
SPACE