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The photon correlation spectroscopy (PCS) experiment can measure the distribution of particle sizes by measuring dynamic fluctuations of intensity of scattered light. A way to analyse particle sizes from PCS is to calculate the auto-correlation function of the detected intensity. In order to get accurate result, we need a photon correlator with small sampling time and large-scale dynamic range. This...
Digital correlation techniques are used in photon correlation spectroscopy (PCS) experiments to gain information about the diffusion coefficient and thereby the size and distribution of submicron particle structures in fluid media. This paper presents a photon correlation system implemented by high performance FPGA (Field Programmable Gate Array). Owning to the digital nature of photon counting, correlators...
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