• Open Access

Multimode dynamics in a short-pulse THz free electron laser

Ruslan Chulkov, Vitaliy Goryashko, Denis D. Arslanov, Rienk T. Jongma, Wim J. van der Zande, and Vitali Zhaunerchyk
Phys. Rev. ST Accel. Beams 17, 050703 – Published 22 May 2014
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  • INTRODUCTION
  • FLARE DESCRIPTION
  • THE MODEL
  • RESULTS AND DISCUSSION
  • CONCLUSIONS
  • ACKNOWLEDGEMENTS
    • References

    Abstract

    The interaction of waveguide modes and consequences on laser operation are studied numerically in a THz free electron laser (FEL) driven by short electron bunches. The considered FEL cavity configuration is represented by a parallel-plate waveguide extending over the complete distance between cylindrical cavity mirrors with energy out-coupling through a rectangular slit in one of the mirrors. We describe the multimode FEL cavity desynchronization dynamics and predict strong enhancement in FEL power at special cavity configurations, when modes are degenerate. Furthermore, we predict that simultaneous excitation of several waveguide modes can occur but do not negatively influence the lasing process.

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    • Received 19 February 2014

    DOI:https://doi.org/10.1103/PhysRevSTAB.17.050703

    This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

    Published by the American Physical Society

    Authors & Affiliations

    Ruslan Chulkov1, Vitaliy Goryashko2, Denis D. Arslanov3, Rienk T. Jongma3, Wim J. van der Zande3, and Vitali Zhaunerchyk4,*

    • 1B.I. Stepanov Institute of Physics, National Academy of Science of Belarus, Nesalezhnasti Avenue 68, 220072 Minsk, Belarus
    • 2Department of Physics and Astronomy, Uppsala University, 751 20 Uppsala, Sweden
    • 3Radboud University Nijmegen, Institute for Molecules and Materials, Heyendaalseweg 135, NL-6525 AJ Nijmegen, The Netherlands
    • 4Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden

    • *Corresponding author. vitali.zhaunerchyk@physics.gu.se

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    Issue

    Vol. 17, Iss. 5 — May 2014

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