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The status of the energy calibration, polarization and monochromatization of the FCC-ee

Bauche, Jeremie; Benedikt, Michael; Blondel, Alain; Carlier, Felix; Hofer, Michael; Janot, Patrick; Keintzel, Jacqueline; Koratzinos, Michael; Lefevre, Thibaut; Oide, Katsunobu; Persson, Tobias; Raimondi, Pantaleo; Shatilov, Dmitry; Tomas, Rogelio; Wenninger, Jorg; Zimmermann, Frank; Bogomyagkov, Anton; Koop, Ivan; Levichev, Evgeny; ... mehr

Abstract:

The Future Circular electron-positron Collider, FCC- ee, is designed for unprecedented precision for particle physics experiments from the Z-pole up to above the top-pair-threshold, corresponding to a beam energy range from 45.6 to 182.5 GeV. Performing collisions at various particle-physics resonances requires precise knowledge of the centre-of-mass energy (ECM) and collision boosts at all four interaction points. Measurement of the ECM by resonant depolarization of transversely polarized pilot bunches in combination with a 3D polarimeter, aims to achieve a systematic uncertainty of 4 and 100 keV for the Z-pole and W-pair-threshold energies respectively. The ECM itself depends on the RF-cavity locations, beamstrahlung, longitudinal impedance, the Earth’s tides, opposite sign dispersion and possible collision offsets. Application of monochromatization schemes are envisaged at certain beam energies to reduce the energy spread. The latest results of studies of the energy calibration, polarization and monochromatization are reported here.


Verlagsausgabe §
DOI: 10.5445/IR/1000163678
Veröffentlicht am 02.11.2023
Originalveröffentlichung
DOI: 10.18429/JACoW-IPAC2023-MOPL059
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Beschleunigerphysik und Technologie (IBPT)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 26.09.2023
Sprache Englisch
Identifikator ISBN: 978-3-95450-231-8
KITopen-ID: 1000163678
HGF-Programm 54.11.11 (POF IV, LK 01) Accelerator Operation, Research and Development
Erschienen in 14th International Particle Accelerator Conference, Venedig, 7th-12 May 2023
Veranstaltung 14th International Particle Accelerator Conference (IPAC 2023), Venedig, Italien, 07.05.2023 – 12.05.2023
Verlag JACoW Publishing
Seiten 674-677
Schlagwörter Accelerator Physics, mc1-colliders-and-other-particle-physics-accelerators - MC1: Colliders and other Particle Physics Accelerators, mc1-a02-lepton-circular-colliders - MC1.A02: Lepton Circular Colliders
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