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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Helically corrugated waveguide gyrotron traveling wave amplifier using a thermionic cathode electron gun

Cross, A.W. and He, W. and Phelps, A.D.R. and Ronald, K. and Whyte, C.G. and Young, A.R. and Robertson, Craig and Rafferty, E.G. (2007) Helically corrugated waveguide gyrotron traveling wave amplifier using a thermionic cathode electron gun. Applied Physics Letters, 90 (25). p. 253501. ISSN 0003-6951

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Abstract

Experimental operation of a gyrotron traveling wave amplifier with a helically corrugated waveguide using a thermionic cathode electron gun is presented. The coupling between the second harmonic cyclotron mode of the gyrating electron beam and the radiation occurred in the region of near infinite phase velocity over a broad frequency band. With an axis-encircling electron beam of pitch factor of ∼ 1.2, energy of 185 keV, and current of 6.0 A, the amplifier achieved an output power of 220 kW, saturated gain of 24 dB, saturated bandwidth of 8.4 to 10.4 GHz, and an interaction efficiency of 20%.