US 12,382,570 B2
Rotating capacitor, circular accelerator, and particle therapy system
Takamitsu Hae, Tokyo (JP); and Masahiro Ikeda, Tokyo (JP)
Assigned to HITACHI HIGH-TECH CORPORATION, Tokyo (JP)
Filed by Hitachi High-Tech Corporation, Tokyo (JP)
Filed on Sep. 2, 2022, as Appl. No. 17/902,066.
Claims priority of application No. 2021-147099 (JP), filed on Sep. 9, 2021.
Prior Publication US 2023/0074582 A1, Mar. 9, 2023
Int. Cl. H05H 7/02 (2006.01); A61N 5/10 (2006.01); H05H 7/10 (2006.01); H05H 13/02 (2006.01)
CPC H05H 7/02 (2013.01) [A61N 5/1078 (2013.01); H05H 7/10 (2013.01); A61N 2005/1087 (2013.01); H05H 2007/025 (2013.01); H05H 13/02 (2013.01); H05H 2277/11 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A rotating capacitor 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 modulating a frequency of the first radio frequency, the rotating capacitor comprising:
a stator electrode;
a rotor electrode that is disposed to face the stator electrode and is used for modulating the frequency of the first radio frequency together with the stator electrode;
a vacuum seal that performs vacuum sealing around a rotation shaft for rotating the rotor electrode; and
a bearing that is installed on an atmosphere side and supports the rotation shaft.