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A low-perveance electron gun for a high-efficiency Ka-band klystron

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Abstract

Self-consistent analytic and numeric design for a set of electron guns with a high beams quality to be used in high-power Ka-band klystrons is presented in this paper. The set of electron guns can be used in the high-power Ka-band klystrons in order to feed linear accelerating structures at 36 GHz with an estimated 20 MW input power by achieving an effective accelerating electric field in the (100–150) MV/m range. In the framework of the Compact Light XLS project, a short Ka-band linearizer by working at 36 GHz able to provide an integrated voltage of at least 15 MV is proposed for bunch-phase linearization. In order to optimize the Ka-band klystrons efficiency for achieving 20 MW RF output power, different electron guns, beam focusing channel designs and the RF beam dynamics are examined and discussed in this paper.

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Data Availability Statement

The data that support the findings of this study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors would like to thank Dr. Augusto Marcelli for his useful discussion and helpful advice. This work was partially supported by the Compact Light XLS Project, funded by the European Union’s Horizon 2020 research and innovation program under grant agreement No. 777431.

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Authors and Affiliations

  1. Laboratori Nazionali di Frascati, INFN, P.O. Box 13, I-00044, Frascati, Italy

    B. Spataro & M. Behtouei

  2. Dipartimento di Ingegneria Elettronica, Università degli Studi di Roma “Tor Vergata”, Via del Politecnico, 1-00133, Roma, Italia

    F. Di Paolo & A. Leggieri

Authors
  1. B. Spataro
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  2. M. Behtouei
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  3. F. Di Paolo
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  4. A. Leggieri
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Correspondence to B. Spataro.

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Spataro, B., Behtouei, M., Di Paolo, F. et al. A low-perveance electron gun for a high-efficiency Ka-band klystron. Eur. Phys. J. Plus 137, 769 (2022). https://doi.org/10.1140/epjp/s13360-022-02987-y

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