Zhang Qingteng, Dufresne Eric M, Grybos Pawel, Kmon Piotr, Maj Piotr, Narayanan Suresh, Deptuch Grzegorz W, Szczygiel Robert, Sandy Alec
Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA.
AGH University of Science and Technology, av. Mickiewicza 30, Krakow 30-059, Poland.
J Synchrotron Radiat. 2016 May;23(Pt 3):679-84. doi: 10.1107/S1600577516005166. Epub 2016 Apr 19.
Small-angle scattering X-ray photon correlation spectroscopy (XPCS) studies were performed using a novel photon-counting pixel array detector with dual counters for each pixel. Each counter can be read out independently from the other to ensure there is no readout dead-time between the neighboring frames. A maximum frame rate of 11.8 kHz was achieved. Results on test samples show good agreement with simple diffusion. The potential of extending the time resolution of XPCS beyond the limit set by the detector frame rate using dual counters is also discussed.
使用一种新型的光子计数像素阵列探测器进行小角散射X射线光子相关光谱（XPCS）研究，该探测器每个像素有两个计数器。每个计数器可独立于另一个进行读出，以确保相邻帧之间没有读出死时间。实现了11.8 kHz的最大帧率。测试样品的结果与简单扩散结果吻合良好。还讨论了使用双计数器将XPCS的时间分辨率扩展到超出探测器帧率所设定极限的潜力。
