Patent ID: 9497847
Filing Date: 2016-11-15
CPC Classification: H05H

Claim Text:
1. A port member of a superconducting accelerating cavity comprising: a port body welded to a port portion formed in a beam pipe part provided at an end of a cavity body, the beam pipe being formed of a niobium material having high purity; and a first flange portion configured to be attached to an external structure, wherein both the port body and the first flange portion are integrally formed of a niobium material having lower purity than that of the beam pipe part or a niobium alloy containing a component other than niobium at a percentage lower than a prescribed percentage, wherein the first flange portion is attached to a second flange portion included in the external structure by a quick coupling, wherein the first flange portion and the second flange portion are tightened by the quick coupling in the state where a sealing member is interposed therebetween, wherein the quick coupling includes a plurality of fitting portions which are connected with each other so that a peripheral length of the quick coupling can be changed and a clamp member which reduces the peripheral length of the quick coupling, and wherein the fitting portion is configured to apply a predetermined planar pressure to the sealing member when a predetermined peripheral length is obtained.