Superconducting Sputtered quarter wave cavity

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Superconducting Sputtered quarter wave cavity

• M. Pasini, CERN AB/RF

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The proposal

• Develop, build and test prototypes of a low
  (ß4.5), medium (ß 7.6) and high (ß12.1)
  energy superconducting 101 MHz quarter wave
  cavities based on the sputtering of a thin film
  of niobium (Nb) on copper (Cu). The goal is to
  achieve 6MV/m of effective accelerating gradient
  with a power dissipation of less than 7 W in
  operational configuration.

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Motivation 1/2

• Post acceleration of weak radioactive ion beams
  can benefit enormously from the sputtering
  technology, since it provides a very stable
  environment given its mechanical properties in
  cold condition.
• The improved stability would manifest into a
  lower system complexity, hence reducing the
  capital and operating costs.
• European and non-European projects could benefit
  from the results of the research activity
  (SPIRAL-II, SPES, ISAC-II, FAIR-NUSTAR, ANU,
  collaboration with CI)

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Motivation 2/2

• Why now? The planned energy up-grade of the
  REX-Isolde can provide a suitable test bench.
• This research activity would aim at an industrial
  involvement so that future technology transfer
  could be envisage.

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Research break down (over 3 years)
6 FTEs, 750 kEUR
3 FTEs, 300 kEUR
1 FTEs 50 kEUR