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As the development of electronic science and technology, electronic dataacquisition (DAQ) system is more and more widely applied to nuclear physicsexperiments. Workstations are often utilized for data storage, data display,data processing and data analysis by researchers. Nevertheless, theworkstations are ordinarily separated from detectors in nuclear physicsexperiments by several kilometers or even tens of kilometers. Thus a DAQ systemthat can transmit data for long distance is in demand. In this paper, wedesigned a DAQ system suitable for high-speed and high-precision sampling forremote data transfer. An 8-channel, 24-bit simultaneous samplinganalog-to-digital converter(ADC) named AD7779 was utilized for high-speed andhigh-precision sampling, the maximum operating speed of which runs up to 16kilo samples per second(KSPS). ADC is responsible for collecting signals fromdetectors, which is sent to Field Programmable Gate Array(FPGA) for processingand long-distance transmission to the workstation through optical fiber. As thecentral processing unit of DAQ system, FPGA provides powerful computingcapability and has enough flexibility. The most prominent feature of the systemis real-time mass data transfer based on streaming transmission mode, highlyreliable data transmission based on error detection and correction andhigh-speed high-precision data acquisition. The results of our tests show thatthe system is able to transmit data stably at the bandwidth of 1Gbps.

A multi-channel DAQ system based on FPGA for long-distance transmission in nuclear physics experiments