LINAC2026 - 33rd Linear Accelerator Conference

Development of capacitive bellows tuner for low-beta single spoke cavity

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC3.A07: Superconducting structures Poster Session

Speaker

Yasuhiro Kondo (Japan Atomic Energy Agency)

Description

We are now developing a capacitive bellows tuner to increase a frequency tuning range of low-beta single spoke cavity. By inserting a length-adjustable niobium bellows electrode from the outer conductor of a coaxial (half-wavelength) superconducting cavity toward the inner conductor electrode, a larger tuning range than conventional methods is realized. The bellows electrode is fabricated from high-purity niobium material. The fabricated tuner is incorporated into the superconducting spoke cavity under development at J-PARC, and the resonance frequency of the cavity is measured. Fabrication of the bellow tuner and frequency measurement is presented.

Funding Agency

This work was supported by JSPS KAKENHI Grant Number JP24K15600.