MOPM007

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URL	https://doi.org/10.18429/JACoW-IPAC25-MOPM007
Title	FCC-ee energy calibration and polarization - status and outlook
Authors	J. Keintzel, C. Carli, D. Sittard, F. Zimmermann, G. Roy, G. Iadarola, G. Wilkinson, J. Bauche, J. Wenninger, K. Oide, M. Hofer, P. Janot, R. Kieffer, R. Tomas, S. Mazzoni, T. Lefevre, W. Höfle European Organization for Nuclear Research A. Blondel University of Geneva A. Faus-Golfe, A. Korsun, A. Martens Université Paris-Saclay, CNRS/IN2P3, IJCLab A. Bogomyagkov, I. Koop, N. Muchnoi, S. Nikitin Affiliated with an institute formerly covered by a cooperation agreement with CERN C. Kiel, F. Carlier, L. van Riesen-Haupt, T. Pieloni, Y. Wu École Polytechnique Fédérale de Lausanne D. Gaskell Thomas Jefferson National Accelerator Facility D. Sagan Cornell University (CLASSE) D. Barber Deutsches Elektronen-Synchrotron DESY E. Torrence University of Oregon H. Jiang, J. Tamazirt Laboratoire de Physique des 2 Infinis Irène Joliot-Curie I. Nikolaev Russian Academy of Sciences K. Hock Brookhaven National Laboratory Z. Zhang Synchrotron soleil Z. Duan Institute of High Energy Physics
Abstract	The Future electron-positron Circular Collider, FCC-ee, aims at high-precision particle physics experiments with beam energies from 45.6 to 182.5 GeV, corresponding to the Z-pole up to above the top-pair-threshold. These goals demand, among others, a precise knowledge of the center-of-mass energy and, hence, the beam energies. By depolarizing previously polarized pilot bunches and recording the change of polarization with a 3D polarimeter, it is aimed to determine the spin tune and thereby achieve a systematic uncertainty on the beam energy in the order of tens of keV. The latest progress of the work conducted by the FCC-ee energy calibration and polarization working group is reported here.
Paper	download: MOPM007.pdf
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Conference	16th International Particle Accelerator Conference
Series
Location	Taipei, Taiwan
Date	01-06 Jun 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	* Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center
Online ISBN	978-3-95450-248-6
Online ISSN	2673-5490
Received	26 May 2025
Revised	05 June 2025
Accepted	05 June 2025
Issued	06 June 2025
DOI	10.18429/JACoW-IPAC25-MOPM007
Pages	267-270
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