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.