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Proceedings Paper

Proton Beam Transit-Time Oscillator (TTO) For Producing High Power Microwaves
Author(s): Michael A. Mostrom; Randy M. Clark; M. Joseph Arman; Mark M. Campbell; Brendan B. Godfrey; Donald J. Sullivan; John E. Walsh
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Paper Abstract

Self-consistent, 2D, electromagnetic particle-in-cell computer simulations agree with the linear and nonlin-ear theoretical model presented in a companion paper and confirm the importance of space-charge effects. Simulations under idealized conditions demonstrate 18% conversion efficiency of ion beam power into 100 GW of extracted microwaves. Internal fields in the cavity reach 13 MV/cm. Typical constraints on the beam parameters are Vb > 3 MeV to avoid resonance shifts due to gap closure, Ib > 100 kA to maximize the growth rate and minimize the interaction Q, and Tb > 30 ns to keep the cavity gap d > 1 cm. This excludes small scale experiments from any proof-of-principal demonstration. Further theoretical research is needed for the necessary external magnetic field in cylindrical cavities and for plasma formation.

Paper Details

Date Published: 25 July 1989
PDF: 8 pages
Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); doi: 10.1117/12.951781
Show Author Affiliations
Michael A. Mostrom, Mission Research Corporation (United States)
Randy M. Clark, Mission Research Corporation (United States)
M. Joseph Arman, Mission Research Corporation (United States)
Mark M. Campbell, Mission Research Corporation (United States)
Brendan B. Godfrey, Mission Research Corporation (United States)
Donald J. Sullivan, Mission Research Corporation (United States)
John E. Walsh, Dartmouth College (United States)

Published in SPIE Proceedings Vol. 1061:
Microwave and Particle Beam Sources and Directed Energy Concepts
Howard E. Brandt, Editor(s)

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