Intensity interferometry of single x-ray pulses from a synchrotron   storage ring
  We report on measurements of second-order intensity correlations at the high brilliance storage ring PETRA III using a prototype of the newly developed Adaptive Gain Integrating Pixel Detector (AGIPD). The detector recorded individual synchrotron radiation pulses with an x-ray photon energy of 14.4 keV and repetition rate of about 5 MHz. The second-order intensity correlation function was measured simultaneously at different spatial separations that allowed to determine the transverse coherence length at these x-ray energies. The measured values are in a good agreement with theoretical simulations based on the Gaussian Schell-model. 
A. Singer, U. Lorenz, A. Marras, A. Klyuev, J. Becker, K. Schlage, P.   Skopintsev, O. Gorobtsov, A. Shabalin, H.-C. Wille, ...
physics.optics