Port member of superconducting accelerating cavity

摘要

Provided is a port member of a superconducting accelerating cavity, the entire size of which is reduced and which has enhanced working efficiency to achieve a lower manufacturing cost. In a pickup port (23) of a superconducting accelerating cavity, one end is joined by welding to a port portion (27) formed on a higher order mode coupler (13) which is provided at an end of a cavity body, while the other end is joined by flange coupling to a pickup antenna (22). A port body (33) and a flange portion (35) are integrally formed of a niobium material having low purity or a niobium alloy containing a component other than niobium at a percentage lower than a prescribed percentage. The flange coupling is achieved with use of a quick coupling (41).

主权项

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.