Measurement of the coherence of synchrotron radiation

Y. Takayama, R. Z. Tai, T. Hatano, T. Miyahara, W. Okamoto, Y. Kagoshima

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The first-order spatial (transverse) coherence of synchrotron radiation has been measured using a Young's interferometer at BL28A (a helical-undulator beamline) of the Photon Factory, KEK. The range of the photon energy is about 70-180 eV. The visibility of the fringe was found to depend largely on the electron emittance and the intrinsic photon emittance. In principle, it is possible to gain knowledge of the very small electron emittance, of the order of 10-10 m rad, without disturbing the electron beam in the storage ring.

Original languageEnglish
Pages (from-to)456-458
Number of pages3
JournalJournal of Synchrotron Radiation
Issue number3
Publication statusPublished - 1998 May 1


  • Coherence
  • Emittance
  • Visibility
  • Young's interferometer


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