Design of Multiple-Tau Photon Correlation System Implemented by FPGA
The photon correlation spectrascopy(PCS) experiment can measure the distribotiou of particle sizes by measuring dynamic fluctuations of intensity of scattered light. A way to analyse particle sizes from PCS is to calculate the autocorrelation 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 paper presents not only a linear photon eorrelator but also a multiple-tau correlator Implemented by high performance Xlllnx Field Programmable Gate Array(FPGA). In the photon correlator,the works of counting,delaying,multiplying and accumulating are all completed In one FPGA chip. The Verilog.HDL is adopted in the design of FPGA modules. Experimental results indicate that this correlator can be applied in the analysing of ultra-fine particle sizing.
photon correlotor FPGA multiple-tan ping-pong counter
Wei Liu Jin Shen Xianming Sun
School of Electrical and Electronic Engineering Shandong University of Technology Zibo,ShanDong Province,255049,China
国际会议
成都
英文
410-414
2008-01-01（万方平台首次上网日期，不代表论文的发表时间）