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Study of electrostatic-magnetic deflector for CEPC

Radiation Detection Technology and Methods 2021年第3期5卷 347-355页

作者： Jianbin Zhu Bin Chen Yudong Liu Yuan Chen Yunlong Chi Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose As the key component for the Higgs operating mode of Circular Electron-Positron Collider(CEPC),the electrostatic-magnetic deflectors are required by the double ring collider to separate the electron and the positron beams horizontally in the RF *** electric field is required to reach 2 MV/m with the vacuum pressure of less than 2×10^(−10) *** deflectors make use of both electric and magnetic fields to deflect the *** incoming beam gets zero deflection,but the outgoing beam is deflected by the combined effect of the electric and magnetic forces.W and Z modes use the same cavities with H mode to save *** deflectors are large contributors to the overall beam impedance which is necessary to be reduced as much as *** The electric and magnetic field optimization has been performed by the *** beam impedance study has been carried out using the Computer Simulation Technology(CST)particle *** The shape of the electrode is optimized for a good electric field homogeneity(±0.05%)in 46 mm×40 mm *** electric field and the magnetic field could be matched perfectly in the main body of the deflector by bending the elec-trodes and introducing magnetic field clamps and mirror *** beam loss factor decreases by about 20%via the intro-duction of ground electrodes and tapering *** The design results successfully meet the physical requirements,and the mechanical design has been finished.

关键词： Electrostatic-magnetic deflector Field homogeneity Field matching beam impedance

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