High-power high-frequency gyrotron amplifiers and investigation of CNT cathode emitters

Young, Alan and Robertson, Craig and MacInnes, Philip and Wilson, Kieran and Speirs, David and Phelps, Alan and Whyte, Colin and Ronald, Kevin; Mcquage, Matthew and Clark, Amy and Wilson, Christopher R., eds. (2026) High-power high-frequency gyrotron amplifiers and investigation of CNT cathode emitters. In: SPIE Proceedings. Proceedings of SPIE, 14022 . SPIE, USA. (https://doi.org/10.1117/12.3094956)

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Abstract

By adding a helically corrugation to a cylindrical it is possible to design dispersions with whatever properties are desired. Two such waveguides have been designed, one as the interaction for a gyrotron amplifier and the other for a passive pulse compressor. Modelling of the gyrotron amplifier shows 30dB of gain across the frequency range 9GHz to 9.6GHz. Modelling and low power tests of the pulse compressor show compression ratios of 20. As a potential electron source for the gyrotron amplifier carbon nanotube materials present an interesting development. A short pulse(~100ns), 80kV test rig has been built to test these materials.

ORCID iDs

Young, Alan ORCID logoORCID: https://orcid.org/0000-0002-3494-1242, Robertson, Craig ORCID logoORCID: https://orcid.org/0000-0002-3552-466X, MacInnes, Philip ORCID logoORCID: https://orcid.org/0000-0003-2882-9817, Wilson, Kieran, Speirs, David ORCID logoORCID: https://orcid.org/0000-0001-5705-6126, Phelps, Alan ORCID logoORCID: https://orcid.org/0000-0002-1100-1012, Whyte, Colin ORCID logoORCID: https://orcid.org/0000-0002-5431-2443 and Ronald, Kevin ORCID logoORCID: https://orcid.org/0000-0002-8585-0746; Mcquage, Matthew, Clark, Amy and Wilson, Christopher R.