基于USB和FPGA实现的高速光子符合仪

本文基于USB2．0高速接口、大规模可编程器件FPGA及高速ECL逻辑电路，实现了一种高速多通道的光子符合设备。此设备能够同时统计八通道单光子检测器的所有可能的255种符合事件，且平均处理速度可达到每秒12．5M事件。在此速度下，可实现事件的间隔在13ns时不丢失的记录下来。同时，可利用高速USB接口，把采集到的原始通道数据直接送往主机进行存储、处理或实时监测统计结果。也可以利用FPGA先做预处理，然后再将预处理后的事件数据送往主机进行处理、分析或存储。

Implementation of high speed photon coincidence instument based on USB and FPGA

Based on Usb2.0 high speed interface,large-scale programmable device FPGA and high speed ECL logic units, this paper implements a high speed and multi-channel photon coincidence device.The device can count 8 single-photon detectors for all 255 coincidence events at once,and its average processing speed can reach at 12.5 M events/s. At the speed,the device can record two events when both of them occur in a minimum interval of 13 ns.And the device can send the sample data to host directly for storing, process...