High gradient test of the HINS SSR1 single spoke resonator

Eighteen {beta} = 0.21 superconducting single spoke resonators comprise the first state in the cold section of the 8-GeV H{sup -} Linac for Fermilab's proposed Project X. After Buffered Chemical Polishing and High Pressure Rinse, one resonator has undergone high gradient RF testing at 2.0-4.5 K in the Vertical Test Stand at Fermilab. They present measurements of the surface resistance as a function of temperature and the quality factor as a function of accelerating field. The resonator reached an accelerating field of 18.0 MV/m.

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[2]  A. Bosotti,et al.  Production of 325 MHZ single spoke resonators at FNAL , 2007, 2007 IEEE Particle Accelerator Conference (PAC).