New results of development on high efficiency high gradient superconducting rf cavities [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 539 Modern physics
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
• Mô tả vật lý: Size: 3 p. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 268197
• Chủ đề: 1. 43 particle accelerators; 2. Ghz range 01-100; 3. Niobium; 4. Superconducting cavity resonators; 5. Temperature range 0000-0013 k

Tóm tắt

 We report on the latest results of development on high-efficiency high-gradient superconducting radio frequency (SRF) cavities. Several 1-cell cavities made of large-grain niobium (Nb) were built, processed and tested. Two of these cavities are of the Low Surface Field (LSF) shape. Series of tests were carried out following controlled thermal cycling. Experiments toward zero-field cooling were carried out. The best experimentally achieved results are E<
 sub>
 acc<
 /sub>
  = 41 MV/m at Q<
 sub>
 0<
 /sub>
  = 6.5�10<
 sup>
 10<
 /sup>
  at 1.4 K by a 1-cell 1.3 GHz large-grain Nb TTF shape cavity and E<
 sub>
 acc<
 /sub>
  = 49 MV/m at Q<
 sub>
 0<
 /sub>
  = 1.5�10<
 sup>
 10<
 /sup>
  at 1.8 K by a 1-cell 1.5 GHz large-grain Nb CEBAF upgrade low-loss shape cavity.