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Proceedings Paper

W-band micro-fabricated modular klystrons
Author(s): George Caryotakis; Erik N. Jongewaard; Robert L. Kustom; Neville C. Luhmann Jr.; Michael I. Petelin; Glenn P. Scheitrum; A. Vlieks
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Paper Abstract

Conventional CW millimeter amplifiers (coupled-cavity TWTs or gyro-klystrons) are limited in power by the maximum current hat can be accommodated in a single beam. Cathode current density, beam optics, and the magnetic field necessary to confine the beam, combine to limit beam current and add cost and bulk to the device. If the microwave source is designed as a pulsed klystron operating at a high voltage, larger lateral as well as axial dimensions can be employed. Beam optics become easier and permanent magnet periodic focusing is possible. A higher efficiency also results, because of the low perveance. A number of klystrons can then be fabricated on single substrate, using a deep- etch lithography technique. They can be water-cooled individually, and operated in parallel. Several such modules can be stacked to form a klystron `brick,' requiring a relatively low voltage for the peak and average power produced. The `brick' can be provided with a single output, or with individual, spatially-combined radiators. The design of a 4 X 10 X 1.5-inch module producing 500 kW peak, 500 W average at 91 GHz, and operating at 120 kV, 10 A, will be described.

Paper Details

Date Published: 3 October 1997
PDF: 8 pages
Proc. SPIE 3158, Intense Microwave Pulses V, (3 October 1997); doi: 10.1117/12.284008
Show Author Affiliations
George Caryotakis, Stanford Linear Accelerator Ctr. (United States)
Erik N. Jongewaard, Stanford Linear Accelerator Ctr. (United States)
Robert L. Kustom, Argonne National Lab. (United States)
Neville C. Luhmann Jr., Univ. of California/Davis (United States)
Michael I. Petelin, Institute of Applied Physics (Russia)
Glenn P. Scheitrum, Stanford Linear Accelerator Ctr. (United States)
A. Vlieks, Stanford Linear Accelerator Ctr. (United States)

Published in SPIE Proceedings Vol. 3158:
Intense Microwave Pulses V
Howard E. Brandt, Editor(s)

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