Open AccessMeasurement of the coherence of synchrotron radiation
Author(s) -
Takayama Y.,
Tai R. Z.,
Hatano T.,
Miyahara T.,
Okamoto W.,
Kagoshima Y.
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049597013010
Subject(s) - undulator , thermal emittance , synchrotron radiation , physics , beamline , coherence (philosophical gambling strategy) , optics , storage ring , photon , synchrotron , electron , photon energy , interferometry , particle accelerator , coherence length , radiation , beam (structure) , nuclear physics , superconductivity , quantum mechanics
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.