Microprocessor-based photon correlator

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Abstract
We present a new microprocessor-based correlation technique for photon correlation spectroscopy. We give a description of the hardware and software configurations for 256 channels. The instrument performs real-time correlations in the sampling time range 65-4.8 ms and works in batch mode for sample times between 50 and 5 μs; in the intermediate range, a concurrent mode is used to reach an efficiency comparable to real-time correlation. The present realization has the advantages of a small size and low-cost instrument. Conclusive tests are presented for the analysis of Brownian motion and cell motility measurements.SCOPUS: ar.jinfo:eu-repo/semantics/publishe