Author: Schmidt, F.
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MOP20 Space Charge Resonance Analysis at the Integer Tune for the CERN PS 124
 
  • F. Schmidt, F. Asvesta
    CERN, Geneva, Switzerland
 
  In the context of the LHC Injectors Upgrade (LIU) project, a series of studies have been performed in order to better understand the beam brightness limitations imposed by resonances and space charge effects. Space charge simulations using the analytic (frozen) space charge solver as implemented in the MAD-X code conducted for the CERN Proton Synchrotron (PS) show that a particle approaching the integer tune of Qx = 6 demonstrates a resonant behavior. The analysis of the single particle transverse motion reveals the excitation of a second order resonance. The interplay of the space charge effect and the optics perturbation in the regime of the integer tune on this excitation was further investigated. The simulations were complemented with the analysis of the resonance driving terms coming from the space charge potential derived in a classical perturbative approach.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2021-MOP20  
About • Received ※ 05 October 2021 — Revised ※ 20 October 2021 — Accepted ※ 24 December 2021 — Issue date ※ 12 April 2022
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MOP21 3D Symplectic Space Charge Implementation in the Latest Mad-X Version 129
 
  • F. Schmidt, A. Latina, H. Renshall
    CERN, Geneva, Switzerland
  • Y.I. Alexahin
    Fermilab, Batavia, Illinois, USA
 
  In 2018 as part of a collaboration between CERN and FNAL, the space charge (SC) implementation has been upgraded in a test version of MAD-X. The goal has been to implement the 3D symplectic SC kick together with a number of new features and benchmark it with earlier MADX-SC versions. Emphasis has given to the use of the Sigma Matrix approach that allows to extend MAD-X optics calculations. In the meantime, significant effort has been made to fully debug and optimize the code and in particular to achieve a speed-up of the simulations by a factor of 2. The code has been ported to the latest MAD-X version, the elaborated set-up procedures have been automated and a user manual has been written.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2021-MOP21  
About • Received ※ 05 October 2021 — Revised ※ 21 October 2021 — Accepted ※ 11 November 2021 — Issue date ※ 12 April 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)