APS » PROLA » Phys. Rev. Lett. » Volume 84 » Issue 12

Phys. Rev. Lett. 84, 2746 - 2749 (2000)

High-Gain Wide-Band Gyrotron Traveling Wave Amplifier with a Helically Corrugated Waveguide
Download: PDF (262 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

V. L. Bratman1, A. W. Cross2, G. G. Denisov1, W. He2, A. D. R. Phelps2, K. Ronald2, S. V. Samsonov1, C. G. Whyte2, and A. R. Young2
1Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, 603600, Russia
2Department of Physics and Applied Physics, University of Strathclyde, Glasgow, G4 0NG, Scotland, United Kingdom

Received 4 October 1999

First bandwidth measurements of a novel gyrotron amplifier are presented. The coupling between the second harmonic cyclotron mode of a gyrating electron beam and the radiation field occurred in the region of near infinite phase velocity over a broad bandwidth by using a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a maximum output power of 1.1 MW, saturated gain of 37 dB, linear gain of 47 dB, saturated bandwidth of 8.4 to 10.4 GHz ( 21% relative bandwidth), and an efficiency of 29%, in good agreement with theory.


©2000 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v84/p2746
DOI: 10.1103/PhysRevLett.84.2746
PACS: 84.40.Ik, 41.60.Cr, 52.75.Ms, 52.75.Va

[ Abstract  |  Previous article  |  Next article  |  Issue 12 ]