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Title End-to-End Longitudinal Simulations in the CERN PS
  • A. Lasheen, H. Damerau, K. Iliakis
    CERN, Meyrin, Switzerland
Abstract In the context of the LHC Injector Upgrade (LIU) project, the main longitudinal limitations in the CERN PS are coupled bunch instabilities and uncontrolled emittance blow-up leading to losses at injection into the downstream accelerator, the SPS. To complement beam measurements, particle tracking simulations are an important tool to study these limitations. However, to avoid excessive runtime, simulations are usually targeting only a fraction of the cycle assuming that bunches are initially matched to the RF bucket. This ignores all initial perturbations that could seed an instability. Simulations were therefore performed along the full PS cycle by using the BLonD tracking code optimized with advanced parallelization schemes. They include beam manipulations with several RF harmonics (batch compression, merging, splittings), controlled emittance blow-up, a model of the beam coupling impedance covering a wide frequency range, as well as beam and cavity feedbacks. A large number of macroparticles is required as well as arrays to store beam induced voltage spanning several revolutions to account for long range wakefields.
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Conference HB2021
Series ICFA ABDW on High-Intensity and High-Brightness Hadron Beams (64th)
Location Batavia, IL, USA
Date 04-08 October 2021
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Eliana Gianfelice (FNAL, Batavia, IL, USA); Sergei Nagaitsev (FNAL, Batavia, IL, USA); Dong Eon Kim (PAL, Pohang, South Korea); Michaela Marx (DESY, Hamburg, Germany); Volker R. W. Schaa (GSI, Darmstadt, Germany)
Online ISBN 978-3-95450-225-7
Online ISSN 2673-5571
Received 16 October 2021
Revised 19 October 2021
Accepted 01 April 2022
Issue Date 11 April 2022
DOI doi:10.18429/JACoW-HB2021-MOP17
Pages 106-111
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