Final rept. 1 Jan-31 Dec 93,
HUGHES RESEARCH LABS MALIBU CA
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This annual report describes research progress made in the second year of the PASOTRON Technology Program. This program is a two year effort sponsored by the Air Force Office of Scientific Research to develop and investigate a single-stage amplifier and a multi-stage oscillator each based on Hughes Plasma-Assisted, Slow-Wave Oscillator PASOTRON technology. During the programs second year amplifier performance was briefly re-explored to take advantage of system and diagnostic upgrades implemented by HRL under a parallel IRD Program and the first stage of the multi-stage oscillator was demonstrated. Data is reported showing improved amplifier performance. Amplifier gains of 10-to-17 dB were maintained while instantaneous bandwidth was increased from 0.1 to 1.0. Amplified power levels of several tens to hundred kilowatts were measured to give a factor-of-ten increase in efficiency to levels of a few present. The first phase measurements were completed, and coherent amplifier operation was achieved with phase stability of up to 0.005 degV. Additionally, a multi-stage oscillator system was designed and experimental investigations were conducted on the first stage of the three-stage apparatus. Characterization of the second and third stages will be completed during the programs three-month no-cost extension.
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