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Title HOT ROLL BONDING METHOD FOR  Nb/Cu CLAD SEAMLESS SC CAVITY
Type Poster cavity design / fabrication / treatment
Abstract We have successfully developed Cu/Nb/Cu sandwiched seamless pipes for superconducting RF L-band single cell cavities using deep-drawing and spinning of a Cu/Nb/Cu clad sheet, which was fabricated by hot rolling technique. DESY formed single-cells with TESLA shape from the sandwiched pipes using their hydro-forming technology. KEK electron-beam welded niobium bulk beam tubes on the cells and made surface treatments included barrel polishing, annealing and electropolishing. As a result of vertical cold test, an excellent performance: Eacc, max =39.0MV/m, Q0, max= 1.67E10 at 1.5K was then achieved in the first test. In this paper, the hot rolling bonded clad tube fabrication method and the cold test results will be presented.

List of authors...

Principle author first.

Last (Family) Name First Name (Initials only) Affiliation or Organization (abbreviations if possible)
Ito I nsc
Saito K KEK
Singer W DESY



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