High power microwaves at 9 GHz from an extended length cavity in a coaxial beam geometry

Journal Article · Mon Sep 27 04:00:00 EDT 1993 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.110655· OSTI ID:6213501

Davis, T J; Schaechter, L; Nation, J A ^[1]

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1. Laboratory of Plasma Studies and School of Electrical Engineering, Cornell University, Ithaca, New York 14853 (United States)

Experiment and simulation demonstrate high power microwave generation at 9 GHz using a 9-cm-diam, 400-keV, 7-kA annular electron beam. The beam is propagated in a coaxial drift tube between inner and outer conductors, a configuration which increases the available beam current and reduces the surface fields from existing high power sources. The microwave interaction is provided by an extended length loaded cavity, overcoming the limitations of radiative loss and low quality factor usually imposed by the coaxial geometry. A coupler samples 25 MW of the total 200 MW produced by the beam-cavity interaction. Simulations indicate that the 7% efficiency can be significantly improved by optimizing the interaction length.

• OSTI ID: 6213501
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 63:13; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

665520* -- Other Methods of Direct Energy Conversion-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
CAVITY RESONATORS
COUPLING
DRIFT TUBES
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
LEPTON BEAMS
MICROWAVE RADIATION
PARTICLE BEAMS
POWER GENERATION
RADIATIONS
RESONATORS