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TY - CONF AU - Li, C.L. AU - Boland, M.J. AU - Corbett, W.J. AU - Grinberg, M. AU - Mitsuhashi, T.M. AU - Xu, Y.H. AU - Zhang, W.J. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Double-slit Interferometer Measurements at SPEAR3 J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - The resolution of a conventional telescope used to image visible-light synchrotron radiation is often limited by diffraction effects. To improve resolution, the double-slit interferometer method was developed at KEK and has since become popular around the world. Based on the Van Cittert-Zernike theorem relating transverse source profile to transverse spatial coherence, the particle beam size can be inferred by recording fringe contrast as a function of interferometer slit separation. In this paper, we describe the SPEAR3 double-slit interferometer, develop a theoretical framework for the interferometer and provide experimental results. Of note the double-slit system is 'rotated' about the beam axis to map the dependence of photon beam coherence on angle. PB - JACoW CP - Geneva, Switzerland SP - 368 EP - 370 KW - electron KW - synchrotron KW - synchrotron-radiation KW - radiation KW - optics DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-MOPMR054 UR - http://jacow.org/ipac2016/papers/mopmr054.pdf ER -