Measurement of a small vertical emittance with a laser wire beam profile monitor

Hiroshi Sakai, Yousuke Honda, Noboru Sasao, Sakae Araki, Hitoshi Hayano, Yasuo Higashi, Kiyoshi Kubo, Toshiyuki Okugi, Takashi Taniguchi, Nobuhiro Terunuma, Junji Urakawa, Mikio Takano

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We describe in this paper a measurement of vertical emittance in the Accelerator Test Facility (ATF) damping ring at KEK with a laser wire beam profile monitor. This monitor is based on the Compton scattering process of electrons with a laser light target which is produced by injecting a cw laser beam into a Fabry-Perot optical cavity. We installed the monitor at a straight section of the damping ring and measured the vertical emittance with three different ring conditions. In all cases, the ATF ring was operated at 1.28 GeV in a single bunch mode. When the ring was tuned for ultralow emittance, the vertical emittance of εy = (1.18 ± 0.08) × 10 -11 mrad was achieved. This shows that the ATF damping ring has realized its target value also vertically.

Original languageEnglish
Article number122801
Pages (from-to)25-34
Number of pages10
JournalPhysical Review Special Topics - Accelerators and Beams
Issue number12
Publication statusPublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces


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