title: Multichannel scaler for general statistical analysis of dynamic light scattering
abstract: A four channel scaler for counting applications has been designed and built using a standard high transfer rate parallel computer interface bus parallel data card. The counter section is based on standard complex programmable logic device integrated circuits. With a 200 MHz Pentium based host PC a sustained counting and data transfer with channel widths as short as 200 ns for a single channel is realized. The use of the multichannel scaler is demonstrated in dynamic light scattering experiments. The recorded traces are analyzed with wavelet and other statistical techniques to obtain transient changes in the properties of the scattered light
keyphrases: multichannel scaler general statistical analysis dynamic light scattering four channel scaler standard high transfer rate parallel computer interface interface bus parallel data card complex programmable logic device 200 MHz Pentium based host PC 200 ns correlation spectroscopy optical spectroscopic techniques photon signal statistical properties standard CPLD ICs windowed Fourier transform