Rotating capacitor, circular accelerator, and particle therapy system
AssigneeHitachi High-Tech Corporation
InventorsTakamitsu Hae, Masahiro Ikeda
Life of this patent
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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.
Claims7
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.
Dependencies are inferred from the claim text.