https://doi.org/10.1140/epjp/s13360-024-05912-7
Regular Article
Two-dimensional simulations of beam energy calibration using Compton scattering method
1
China Nuclear Power Engineering Co., LTD., 100840, Beijing, China
2
School of Science, Shenzhen Campus of Sun Yat-sen University, 518107, Shenzhen, China
3
Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, 100049, Beijing, China
4
State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, CAS, 100049, Beijing, China
5
University of Chinese Academy of Sciences, 19A Yuquan Road, 100049, Beijing, China
6
Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 37232, Nashville, TN, USA
7
The Institute for Advanced Studies of Wuhan University, 299, Bayi Road, 430072, Wuhan, China
8
School of Physics and Astronomy, China West Normal University, No.1, Shida Road, 637009, Nanchong, China
Received:
17
July
2024
Accepted:
9
December
2024
Published online:
8
January
2025
The Circular Electron-Positron Collider (CEPC) performs precision measurements of Higgs boson properties, which require MeV-level precision in beam energy calibration. In the W/Z factory mode, the requirements for beam energy calibration are an order of magnitude higher than those in the Higgs operation. To address this need, we utilize a beam energy calibration scenario based on inverse Compton scattering, using a laser beam heading on the electron bunch and a bending dipole. Our Monte-Carlo simulations demonstrate that the beam energy can be calibrated to a precision of about 1 MeV, using the position distribution of scattered photons and scattered electrons. Additionally, the systematic deviations caused by the magnetic field and the synchrotron radiation are analyzed. The error of the method of measuring the scattering position by measuring the scattering angle is divided into two parts, which are 9.75 and 5.76 MeV, respectively. The estimated systematic deviation of the calibration energy caused by the electron beam emittance angle is approximately 3.4 keV.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
