Patent ID: 9674936
Date: 2017-06-06
CPC Classifications: C25F,H05H

Claim:
1. A superconducting accelerating cavity comprising: a cavity main body formed of a superconducting material into a cylindrical shape; and a refrigerant tank installed around the cavity main body and storing a refrigerant which is supplied from the outside through a supply port into a space created between the refrigerant tank and the outer circumferential surface of the cavity main body, wherein the outer circumferential surface of the cavity main body is coated with a metal material having a higher conductivity than the superconducting material to make the cavity main body function as an anode during electropolishing, the cavity main body has a shape formed by large diameter portions and small diameter portions, which are at a shorter distance to the central axis of the cavity main body than the large diameter portions, the large diameter portions and the small diameter portions being alternately formed along an axial direction, and the coating thickness of the metal material in the large diameter portions is larger than the coating thickness of the metal material in the small diameter portions.