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公开(公告)号：US20230074582A1
公开(公告)日：2023-03-09
申请号：US17902066
申请日：2022-09-02
Applicant: Hitachi, Ltd.
Inventor： Takamitsu HAE , Masahiro IKEDA
Abstract: A rotating capacitor is used in a circular accelerator that accelerates a charged particle beam by feeding a first radio frequency to a DC main magnetic field. The rotating capacitor modulates a frequency of the first radio frequency. The rotating capacitor includes a stator electrode and a rotor electrode used for modulating the frequency of the first radio frequency together with the stator electrode. A vacuum seal performs vacuum sealing around a shaft for rotating the rotor electrode. A bearing that supports the shaft is installed on an atmosphere side.
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