28 October 1996 Pasotron high-power microwave source performance
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The PASOTRON (Plasma Assisted Slow-wave Oscillator) high- power microwave source utilizes a unique plasma-cathode electron gun and self-generated plasma channel to inject a long-pulse electron beam into a variety of slow-wave structures for microwave generation. The plasma-channel beam transport eliminates the need for an externally-applied axial magnetic field to confine the beam, which results in a very compact, low weight HPM source compared to conventional technologies. The Pasotron has been configured as both a backward-wave oscillator (BWO) and a traveling-wave amplifier, and has produced up to 20-MW of peak power and >= 500 Joules per pulse during operation as a BWO. In this paper, we will present the performance of the Pasotron device for a variety of rippled-wall and helix slow-wave structures. The advantages of each slow-wave structure will be discussed, and the output couplers and mode-converters used with each structure to obtain TE-mode outputs are described. The device configurations used for operation in C-band and in L-band will be shown. Long-pulse (approximately equals 100 microsecond(s) ec), plasma-cathode electron-guns operating at 30-to- 200 kV and currents of 50-to-1000 A will also be described. Finally, we will present and discuss pulse shortening that has been observed in these plasma-filled devices.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dan M. Goebel, Dan M. Goebel, Elmira S. Ponti, Elmira S. Ponti, Jon R. Feicht, Jon R. Feicht, Ron M. Watkins, Ron M. Watkins, } "Pasotron high-power microwave source performance", Proc. SPIE 2843, Intense Microwave Pulses IV, (28 October 1996); doi: 10.1117/12.255421; https://doi.org/10.1117/12.255421


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