niobium quarter-wave resonator development for a heavy ion re ...

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Fabrication of Prototype Cavity • Sheet Nb of thickness 2 mm and RRR ≥ 250 was used. • The tip of the center conductor and the beam tubes were machined from solid Nb. • Nb tuning plate on bottom in Nb-Ti to stainless steel flange. • Forming was done at NSCL and in local area; electron beam welding was done with an industrial company. • Indium joints were used to seal the bottom flange. Knife-edge seals were used for beam tube flanges. • c. 150 µm etch (BCP). • High-pressure rinse with ultra-pure water for about 80 minutes.
Electron beam welding of β = 0.041 QWR
Page 1 and 2: ≪≪≪ Poster TuP67 ≫≫≫ Pr
Page 3 and 4: Experiments with fast RIBs Coupled
Page 5: Selected QWR Parameters Optimum β
Page 10 and 11: Nb parts for β = 0.041 QWR (top) a
Page 12 and 13: 0 Ref − S 21 phase (degrees) 0.5
Page 14 and 15: Preparing for RF test of the β = 0
Page 16 and 17: Frequency Issues • Measured reson

niobium quarter-wave resonator development for a heavy ion re ...

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