Performance studies of a laser wire beam profile monitor

Hiroshi Sakai, Yousuke Honda, Noboru Sasao, Sakae Araki, Yasuo Higashi, Toshiyuki Okugi, Takashi Taniguchi, Junji Urakawa, Mikio Takano

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We describe a new type of beam profile monitor developed for measurements of an electron beam as small as 10 μm in size. This monitor is based on the Compton scattering of electrons with a laser light target. A thin and intense laser beam (laser wire) is produced by injecting a CW laser beam into a Fabry-Perot optical cavity. We were able to obtain a stable laser wire having a beam waist of 14.52 ± 0.55 μm and a power gain of 220 ± 20. This monitor was installed in the ATF damping ring at KEK, and was used to measure its vertical emittance. We report in this paper the development and performance studies of this monitor in detail.

Original languageEnglish
Pages (from-to)6398-6408
Number of pages11
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number11
Publication statusPublished - Nov 2002
Externally publishedYes


  • Compton scattering
  • Electron beam
  • Laser
  • Optical cavity

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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