同步辐射储存环单X射线脉冲的强度干涉测量
Intensity interferometry of single x-ray pulses from a synchrotron storage ring
摘要：
我们报告在高亮度储存环PETRA III使用新开发的自适应增益积分像素探测器（AGIPD）的原型的二阶强度相关的测量。探测器记录了单个同步辐射脉冲，其X射线光子能量为14.4 keV，重复频率约为5 MHz。二阶强度关联函数同时测量在不同的空间分离，允许确定在这些X射线能量的横向相干长度。测量值与基于高斯谢尔模型的理论模拟吻合良好。
英文摘要：
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.
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