Physical Review Special Topics. Accelerators and Beams (Dec 2014)

Beam test of a new radio frequency quadrupole linac for the Japan Proton Accelerator Research Complex

  • Yasuhiro Kondo,
  • Takatoshi Morishita,
  • Saisyun Yamazaki,
  • Toshihiko Hori,
  • Yuki Sawabe,
  • Etsuji Chishiro,
  • Shinpei Fukuta,
  • Kazuo Hasegawa,
  • Koichiro Hirano,
  • Nobuhiro Kikuzawa,
  • Isao Koizumi,
  • Akihiko Miura,
  • Hidetomo Oguri,
  • Kiyonori Ohkoshi,
  • Fumiaki Sato,
  • Shinichi Shinozaki,
  • Akira Ueno,
  • Hiroshi Kawamata,
  • Takashi Sugimura,
  • Akira Takagi,
  • Zhigao Fang,
  • Yuji Fukui,
  • Kenta Futatsukawa,
  • Kiyoshi Ikegami,
  • Tomofumi Maruta,
  • Tomoaki Miyao,
  • Kesao Nanmo

DOI
https://doi.org/10.1103/PhysRevSTAB.17.120101
Journal volume & issue
Vol. 17, no. 12
p. 120101

Abstract

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We performed a beam test of a new radio frequency quadrupole linac (RFQ III) for the beam current upgrade of the Japan Proton Accelerator Research Complex. First, the conditioning of RFQ III was conducted, and after 20 h of conditioning, RFQ III became very stable with a nominal peak power and duty factor of 400 kW and 1.5%, respectively. An off-line beam test was subsequently conducted before installation in the accelerator tunnel. The transmission, transverse emittance, and energy spread of the 50-mA negative hydrogen beam from RFQ III were measured and compared with simulation results. The experiment and simulation results showed good agreement; therefore, we conclude that the performance of RFQ III conforms to its design.