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https://doi.org/10.18429/JACoW-FLS2023-MO3B2
Title Beam Dynamics Using Superconducting Passive Harmonic Cavities with High Current per Bunch
Authors
  • A. Gamelin, V. Gubaidulin, A. Loulergue, P. Marchand, L.S. Nadolski, R. Nagaoka
    SOLEIL, Gif-sur-Yvette, France
  • N. Yamamoto
    KEK, Ibaraki, Japan
Abstract In 4th generation synchrotron light sources, harmonic cavities (HCs) are critical components needed to achieve the required performance. They provide longer bunches, which helps to reduce statistical effects (intra-beam scattering and Touschek effect). In "timing" modes, where the bunch spacing is larger than in conventional modes and the number of particles per bunch is higher, this need is even greater. In this article, we present the beam dynamics in the high current per bunch regime and how it interacts with the single bunch collective effects. In particular, a dipole-quadrupole instability is observed above the microwave threshold and a coupling between the dipole and cavity modes is shown to limit bunch lengthening at low current. The effective gain from the use of HCs in terms of lifetime, emittance, and energy spread is also discussed.
Paper download MO3B2.PDF [0.888 MB / 4 pages]
Slides download MO3B2_TALK.PDF [1.529 MB]
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Conference FLS2023
Series ICFA Advanced Beam Dynamics Workshop (67th)
Location Luzern, Switzerland
Date 27 August-01 September 2023
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Hans-Heinrich Braun (PSI, Villigen, Switzerland); Jan Chrin (PSI, Villigen, Switzerland); Romain Ganter (PSI, Villigen, Switzerland); Nicole Hiller (PSI, Villigen, Switzerland); Volker RW Schaa (GSI, Darmstadt, Germany)
Online ISBN 978-3-95450-224-0
Online ISSN 2673-7035
Received 13 August 2023
Revised 15 August 2023
Accepted 31 August 2023
Issued 02 December 2023
DOI doi:10.18429/JACoW-FLS2023-MO3B2
Pages 14-17
Copyright
Creative Commons CC logoPublished by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.