Charles Tessa
WEPL017
Orbit-response based optics corrections for FCC-ee
3143
The new generation of storage rings aims to push the limits of the luminosity and the size of the electrons beam that can be achieved. One of such planned machines is the e+/e- Future Circular Collider (FCC-ee) with 100km circumference. The FCC-ee lattice components can be subject to random misalignments and field errors. These errors can adversely affect the beam's closed orbit and beam optics properties, resulting in a significant reduction in the future collider's performance. This issue requires linear optics correction methods to be utilized, One of these methods is linear optics from closed orbit (LOCO) in which the measured ORM is fitted to the lattice model in order to determine the appropriate quadrupole strengths. n this study we demonstrate the application of closed orbit-based optics correction LOCO for FCC-ee lattices. The code was implemented using the Python accelerator toolbox (PyAT). The impact of alignment errors on FCC the lattice optics parameters were studied.
  • I. Agapov, E. Musa
    Deutsches Elektronen-Synchrotron
  • T. Charles
    Cockcroft Institute
Paper: WEPL017
DOI: reference for this paper: 10.18429/JACoW-IPAC2023-WEPL017
About:  Received: 03 May 2023 — Revised: 05 May 2023 — Accepted: 11 May 2023 — Issue date: 26 Sep 2023
Cite: reference for this paper using: BibTeX, LaTeX, Text/Word, RIS, EndNote
WEPL023
Progress of the FCC-ee optics tuning working group
3158
FCC-ee is a proposed lepton collider with a circumference close to 100 km to produce an unprecedented amount of luminosity. The FCC-ee optics tuning working group is addressing one of the most critical aspects of the FCC-ee, that is the recovery of the optics design performance in presence of realistic imperfections. Various teams from laboratories all around the world have got together to assess field quality tolerances and review and share experience gained at synchrotron light sources and lepton colliders such as SuperKEKB. This paper reports the latest results on optics measurements and tuning simulations for various techniques, the development of simulation tools, and possible layout design changes to optimize the tuning performance.
  • R. Tomas, C. GARCIA JAIMES, F. Valchkova-Georgieva, F. Zimmermann, G. Simon, H. Mainaud Durand, J. Keintzel, K. Oide, M. Hofer, R. De Maria, T. Lefevre, T. Persson, Y. Papaphilippou
    European Organization for Nuclear Research
  • A. Franchi, P. Raimondi, S. White, S. Liuzzo
    European Synchrotron Radiation Facility
  • A. Faus-Golfe
    Université Paris-Saclay, CNRS/IN2P3, IJCLab
  • B. Dalena
    Commissariat à l'Energie Atomique et aux Energies Alternatives
  • E. Musa, I. Agapov, L. Malina
    Deutsches Elektronen-Synchrotron
  • E. Ahmadi
    Iranian Light Source Facility
  • F. Carlier, L. van Riesen-Haupt, T. Pieloni
    Ecole Polytechnique Fédérale de Lausanne
  • K. Oide
    Geneva University
  • M. Koratzinos
    Massachusetts Institute of Technology
  • T. Charles
    Cockcroft Institute
  • T. Raubenheimer, X. Huang
    SLAC National Accelerator Laboratory
  • Y. Onishi
    High Energy Accelerator Research Organization
Paper: WEPL023
DOI: reference for this paper: 10.18429/JACoW-IPAC2023-WEPL023
About:  Received: 03 May 2023 — Revised: 28 Jun 2023 — Accepted: 28 Jun 2023 — Issue date: 26 Sep 2023
Cite: reference for this paper using: BibTeX, LaTeX, Text/Word, RIS, EndNote
WEPL073
The MAX-IV linac with variable bunch compressors
3272
Recent studies have shown that accelerating $+19^{\circ}$ off-crest in all RF cavities in the MAX-IV linac reduces voltage-induced timing jitter from the klystrons. The current bunch compressors in the linac have fixed first-order longitudinal dispersion, and the RF phase is varied to control the amount of compression. Variable bunch compressor designs have been considered at MAX-IV in recent years, these would allow us to regain control over compression while the accelerating phase is fixed to reduce timing jitter. Particle tracking studies have been performed on the MAX-IV linac with the addition of arc-like variable bunch compressors.
  • A. Dixon
    The University of Liverpool
  • P. Williams, T. Charles
    Cockcroft Institute
  • S. Thorin
    MAX IV Laboratory
Paper: WEPL073
DOI: reference for this paper: 10.18429/JACoW-IPAC2023-WEPL073
About:  Received: 01 May 2023 — Revised: 05 May 2023 — Accepted: 15 Jun 2023 — Issue date: 26 Sep 2023
Cite: reference for this paper using: BibTeX, LaTeX, Text/Word, RIS, EndNote