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Proceedings Paper

Ultrawideband generators
Author(s): Phillip A. Pincosy; Peter Poulsen; Jasper Jim Morrison
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Paper Abstract

High-power ultra-wideband pulses with equivalent center frequences of 10 GHz require picosecond switching times of high electric fields. We are developing a high-pressure gas switch that is designed to store several joules of energy. The switch has an overvoltaged gap that is pulse charged to operating voltages before the electron avalanche causes the voltage to collapse. Depending on the gas pressure (designed for up to 100 atm) and the electric field, the voltage collapse time can be hundreds of picoseconds down to a few picoseconds. Uniform development of the avalanche is initiated by photoionization from a bare spark or an ultraviolet laser. The pulse-power charging system is designed to charge the transmission line in a few nanoseconds. The stored energy that would flow as a post-pulse component is to be minimized. Tests of the repetition rate for the switch are part of the development. Data in this paper indicate the achieved gap electric field, the voltage collapse time, and the launched pulse power and energy down a transmission line.

Paper Details

Date Published: 1 May 1992
PDF: 6 pages
Proc. SPIE 1631, Ultrawideband Radar, (1 May 1992); doi: 10.1117/12.59048
Show Author Affiliations
Phillip A. Pincosy, Lawrence Livermore National Lab. (United States)
Peter Poulsen, Lawrence Livermore National Lab. (United States)
Jasper Jim Morrison, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 1631:
Ultrawideband Radar
Ivan J. LaHaie, Editor(s)

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