High-gain wide-band gyrotron traveling wave amplifier with a helically corrugated waveguide

Bratman, V L and Cross, A W and Denisov, G G and He, W and Phelps, A D R and Ronald, K and Samsonov, S V and Whyte, C G and Young, A R (2000) High-gain wide-band gyrotron traveling wave amplifier with a helically corrugated waveguide. Physical Review Letters, 84 (12). pp. 2746-2749. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.84.2746)

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Abstract

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 a maximum output power of 1.1 MW, saturated gain of 37 dB, linear gain of 37 dB, saturated bandwidth of 8.4 to 10.4 GHz (21% relative bandwidth), and an efficiency of 29%, in good agreement with theory.

ORCID iDs

Bratman, V L, Cross, A W ORCID logoORCID: https://orcid.org/0000-0001-7672-1283, Denisov, G G, He, W ORCID logoORCID: https://orcid.org/0000-0001-7018-0527, Phelps, A D R ORCID logoORCID: https://orcid.org/0000-0002-1100-1012, Ronald, K ORCID logoORCID: https://orcid.org/0000-0002-8585-0746, Samsonov, S V, Whyte, C G ORCID logoORCID: https://orcid.org/0000-0002-5431-2443 and Young, A R ORCID logoORCID: https://orcid.org/0000-0002-3494-1242;
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