Towards a Counting Point Detector for Nanosecond Coherent X-ray Science
Source abstract
Abstract
We present the technical realization of a high-speed hard X-ray single-photon counting-detection scheme based on a commercial avalanche silicon photodiode and high-speed oscilloscope. The development is motivated by the need to perform pulse-resolved photon-correlation and pump-probe studies at synchrotron sources with densely packed pulse patterns that result in high repetition rate pulses on the order of hundreds of MHz. Commissioning experiments are performed at the 1C PAL-KRISS beamline at PLS-II of South Korea operating at a burst mode maximum repetition rate of 500 MHz. In such a high count-rate measurement, detector dead-time can lead to a distortion of counting statistics. We are able to model the counting behavior of our detector under these conditions with a detector dead-time comparable to time between X-ray pulses, implying that nanosecond X-ray photon correlation spectroscopy should be possible at diffraction-limited light sources.
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Research context
OpenAlex topics: Advanced X-ray and CT Imaging · Advanced X-ray Imaging Techniques · Medical Imaging Techniques and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Korea Research Institute of Standards and Science, Daejeon 305-340, Korea
Department of Nanoscience, University of Science and Technology (UST), Daejeon 305-340, Korea
Physics Department, DePaul University, Chicago, IL 60614, USA
Funding
DePaul CSH FSRG · Argonne National Laboratory · National Research Foundation of Korea
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