Construction of 714 MHz HOM-free accelerating cavities

Shogo Sakanaka, Fujio Hinode, Kiyoshi Kubo, Junji Urakawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A new 'higher-order-mode (HOM)-free' accelerating cavity has been developed which can provide an accelerating voltage of more than 400 kV per cavity at a frequency of 714 MHz. The harmful HOMs in the cavities, which can induce beam instabilities at high beam currents, were heavily damped by using four special waveguide ports and broadband microwave loads. Two cavities of this design were installed in the 1.54 GeV accelerator test facility (ATF) damping ring at KEK, and successfully stored beams. This cavity will also be very useful for synchrotron light sources. The basic design, characteristics of HOMs and construction of this cavity are reported.

Original languageEnglish
Pages (from-to)386-388
Number of pages3
JournalJournal of Synchrotron Radiation
Issue number3
Publication statusPublished - 1998 May 1


  • Coupled-bunch instabilities
  • Damped cavities
  • HOM-free cavities
  • Higher-order modes

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Instrumentation


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