Speaker
Jun Tamura
(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.
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Author
Jun Tamura
(Japan Atomic Energy Agency)
Co-author
Yasuhiro Kondo
(Japan Atomic Energy Agency)