Ultra small electron beam amplifiersData on field emission and microfabrication technologies relevant to the development of low-power electron-beam amplifiers and oscillators are discussed. The fabrication of a thin-film field-emission (TFFE) cathode for a 1-W electron-beam amplifier is examined. Some TFFE cathodes have been developed and tested in electron guns. Recent experimental results reveal that a beam can be formed from the field-emission cathode, and the TFFE cathode is applicable for devices operating below 3 kV at currents of less than 20 mA. The use of microfabrication techniques to construct slow-wave circuits is studied, and the use of finned structures as the slow-wave circuit for an electron-beam oscillator or amplifier is proposed.
Document ID
19870055407
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dayton, J. A., Jr. (NASA Lewis Research Center Cleveland, OH, United States)
Kosmahl, H. G. (Analex Corp. Cleveland, OH, United States)