Keyword: kicker
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MOP12 Understanding of the CERN-SPS Horizontal Instability with Multiple Bunches impedance, simulation, octupole, injection 77
  • C. Zannini, H. Bartosik, M. Carlà, K.S.B. Li, E. Métral, G. Rumolo, B. Salvant
    CERN, Geneva, Switzerland
  • L.R. Carver
    ESRF, Grenoble, France
  • M. Schenk
    EPFL, Lausanne, Switzerland
  At the end of 2018, an instability with multiple bunches has been consistently observed during high intensity studies at the CERN-SPS. This instability could be a significant limitation to achieve the bunch intensity expected after the LHC Injector Upgrade (LIU). Therefore, a deep understanding of the phenomena is essential to identify the best mitigation strategy. Extensive simulation studies have been performed to explore the consistency of the current SPS model, give a possible interpretation of the instability mechanism and outline some possible cures.  
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DOI • reference for this paper ※  
About • Received ※ 07 October 2021 — Revised ※ 20 October 2021 — Accepted ※ 28 December 2021 — Issue date ※ 11 April 2022
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MOP22 A Dedicated Wake-Building Feedback System to Study Single Bunch Instabilities in the Presence of Strong Space Charge space-charge, pick-up, feedback, betatron 135
  • R. Ainsworth, A.V. Burov, N. Eddy, A. Semenov
    Fermilab, Batavia, Illinois, USA
  Recent advances in the theoretical understanding of beam stability in the presence of strong space charge, has suggested a new class of instabilities known as convective instabilities. A novel approach to excite and study these instabilities will be to install a ‘waker’ system, a dedicated wake-building feedback system. The System was installed in the Fermilab Recycler and commissioned during 2021. The first results are presented.  
DOI • reference for this paper ※  
About • Received ※ 19 October 2021 — Revised ※ 20 October 2021 — Accepted ※ 26 November 2021 — Issue date ※ 12 April 2022
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