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Proceedings Paper

Pulse Power Considerations For The Generation of 45 µs, 200 keV Electron Beams For CO[sub]2[/sub] Lasers
Author(s): R. D. Curry; P. Champney; L. Demeter; S. Lyons; D. Morton; H. Nishimoto; R. Sears; L. Schlitt; W. Weseloh
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Paper Abstract

A two module electron beam source operating over a wide range of output parameters has been designed and fabricated to be used in conjunction with a pair of electron beam sustained CO2 lasers. Each module comprised a grid-controlled thermionic electron beam gun including a compact grid pulser for control of the electron beam, a 250 kV thyratron switched modulator for acceleration of the electron beam, a 1 kHz filament heater and a complex computerized control system. The system was designed to reliably produce 45 μs is wide electron pulses of 150-200 keV energy, operate at repetition rates of 1-10 pps and current densities of 5-20 mA/cm2. Additional parameters are listed in Table 1. The high voltage cathode assembly employs 132 thoriated tungsten filaments distributed over the area of the 250 cm x 10 cm output window. The cathode assembly including the control grids is supported by two high voltage ceramic bushings in a stainless steel vacuum chamber. For acceleration of the electron beam, a pulsed 150-250 kV voltage is applied by a thyratron switched modulator, between the cathode and anode window. The fiber optically controlled grid pulser located in the modulator tank is floated at the applied cathode potential.

Paper Details

Date Published: 10 April 1989
PDF: 15 pages
Proc. SPIE 1046, Pulse Power for Lasers II, (10 April 1989); doi: 10.1117/12.951344
Show Author Affiliations
R. D. Curry, Pulse Sciences, Inc. (United States)
P. Champney, Pulse Sciences, Inc. (United States)
L. Demeter, Pulse Sciences, Inc. (United States)
S. Lyons, Pulse Sciences, Inc. (United States)
D. Morton, Pulse Sciences, Inc. (United States)
H. Nishimoto, Pulse Sciences, Inc. (United States)
R. Sears, Pulse Sciences, Inc. (United States)
L. Schlitt, Pulse Sciences, Inc. (United States)
W. Weseloh, Pulse Sciences, Inc. (United States)

Published in SPIE Proceedings Vol. 1046:
Pulse Power for Lasers II
Tom R. Burkes; G. Glen McDuff, Editor(s)

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