Collision-energy calibration and monochromatisation studies at FCC-ee
Year: 2025
Type: article
Abstract: The Future Circular Collider (FCC) technical and financial Feasibility Study (FS) includes a workpackage on Energy Calibration, Polarisation and Monochromatisation (EPOL), which is concernedwith the precision determination of the centre-of-mass energy at the e+e− machine, FCC-ee. Toachieve this goal it is proposed to use resonant depolarisation and possibly spin precession meas-urements, in conjunction with precise measurement by the detectors of the energy spread and otherparameters with physics events. Beam diagnostics, provided by polarimeters and beam-positionmonitors, play an essential role in monitoring the polarisation level and controlling numerous beamparameters at the interaction point. Specific items of accelerator equipment include polarisationwigglers and depolarising RF-kickers. The target is to achieve a precision commensurate to theremarkable statistical precision achievable in the physics experiments. The possible monochromat-isation of colliding beams in view of a measurement of the e+e− → H(125) process is also beingstudied, with the specific requirements of this procedure under investigation. A review is presentedof the status of these activities at the end of the FS, together with the outlook for future work.
DOI: 10.17181/mbyss-ncb42
Authors: Blondel, A., Keintzel, J., Wenninger, J., Wilkinson, G., Arango, G.N., Bauche, J., Barber, D.P., Bogomyagkov, A., Carli, C., Carlier, F., Duan, Z., Faus-Golfe, A., Gaskell, D., Gianfelice-Wendt, E., Granados, E., Hofer, M., Hofle, W., Janot, P., Kieffer, R., Kiel, C., Koop, I., Koratzinos, M., Lefevre, T., Martens, A., Muchnoi, N., Nikitn, S., Nikolaev, I., Oide, K., Pieloni, T., Raimondi, P., Saenz, S.M., Sagan, D., Shatilov, D., Tomas, R., Tamazirt, J., Torrence, E., Wu, Y., Zhang, Z., Zimmermann, F.
Institutions: University of Geneva, Sorbonne Université, Laboratoire de Physique Nucléaire et de Hautes Énergies, European Organization for Nuclear Research, University of Oxford, Universidad Nacional de Colombia, Deutsches Elektronen-Synchrotron DESY, Institute of High Energy Physics, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie, Thomas Jefferson National Accelerator Facility, Fermi National Accelerator Laboratory, École Polytechnique Fédérale de Lausanne, Paul Scherrer Institute, High Energy Accelerator Research Organization, Cornell University, University of Oregon
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6962776581