The circular electron–positron collider beam energy measurement with Compton scattering and beam tracking method
| Autor: | Manqi Ruan, Zhe Duan, Jianyong Zhang, Shanhong Chen, Xiao-Fei Lan, Yong-Sheng Huang, Xinchou Lou, Guang-Peng An, Guangyi Tang, Yuan Chen, Chunlei Zhang |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Physics business.industry Monte Carlo method Circular Electron Positron Collider Compton scattering Synchrotron radiation 01 natural sciences 010305 fluids & plasmas law.invention Optics law 0103 physical sciences Higgs boson Physics::Accelerator Physics High Energy Physics::Experiment Collider business Instrumentation Beam (structure) Lepton |
| Zdroj: | Review of Scientific Instruments. 91:033109 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.5132975 |
| Popis: | The beam energy of the circular electron-positron collider should be measured precisely to the order of 1 MeV, in order to decrease the uncertainty of the Higgs/W/Z bosons' mass measurement. For this purpose, a lepton bunch is extracted from the collider and collides with an Yttrium-Aluminum-Garnet laser pulse. After the inverse Compton scattering, the main beam and the scattered beam pass through an analytical magnetic field and are deflected to different angles. At the end of the drift beam pipes, the deflecting distances are detected with the spatial resolution of several microns. The systematic uncertainties caused by the detector arrangement, the magnetic field, the angle between the detector plane and the incident beam, and the synchrotron radiation are discussed in detail. The simulations of the statistical errors are given with a toy Monte Carlo sample. With some proper corrections, the beam energy uncertainty of the Higgs mode is around 2 MeV. Our method is applicable to different operating modes of the collider. |
| Databáze: | OpenAIRE |
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