섬유

superconducting structures for a 130 mev recyclotron

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 377
reports feasibility studies of a proposed 3 ghz recyclotron using 20 cell rf structures of spherical shape. as first step a 5 cell nb cavity was fabricated by deep drawing and electron beam welding. only chemical etching was used as global surface treatment after detection of the breakdown location by a resistor network a local mechanical grinding technique was applied. an accelerating field of e/sub acc/=5.6 mv/m at q/sub o/=3.2*10/sup 9/ was reached after two mechanical treatments. these results slightly exceed the design values of the recyclotron. no multipacting was observed, indicating that the spherical shape effectively suppresses this type of field limitation in multicell structures
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