A Superconducting Nb3Sn Coated Multicell Accelerating Cavity

  title={A Superconducting Nb3Sn Coated Multicell Accelerating Cavity},
  author={M. Peiniger and H. Piel},
  journal={IEEE Transactions on Nuclear Science},
We report on the first results, obtained with a five cell Nb3Sn coated accelerating structure of 3 GHz. A uniform layer of Nb3Sn was formed by processing a niobium structure in a tin atmosphere at 1170°C. At 4.2 K a resonator Q of 7·109 was measured. This corresponds to a residual surface resistance of 27 n¿ which is the lowest ever achieved with a Nb3Sn cavity in the GHz range. The rf losses of this resonator are by a factor of 55 lower than those of an equivalent niobium cavity at 4.2 K. The… Expand

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