LHAASO KM2A distributed long-distance data transmission
LHAASO KM2A distributed long-distance data transmission
复制标题
DOI：
10.1007/s41605-019-0123-1
复制
发表时间：
2019-09
影响因子：
0.6
通讯作者：
Fengfan Yang;Jin-fan Chang;Zheng Wang;Shi-di Zhu;Xiao-xu Lu;Na Tan
中科院分区：
文献类型：
--
作者：
Fengfan Yang;Jin-fan Chang;Zheng Wang;Shi-di Zhu;Xiao-xu Lu;Na Tan
背景大型高空空气簇射观测站 (LHAASO) 正在中国四川省稻城（海拔 4410 米）附近建造。其主要仪器是一平方公里的大面积空气淋浴阵列（KM2A），由近7000个探测器组成。该系统采用分布式架构，其中每个探测器都有本地前端电子设备用于信号数字化和传输。白兔（WR）是KM2A中使用的通信协议，以达到探测器之间所需的1纳秒同步精度。目的是在同一网络上提供数据传输和同步。方法我们用Verilog硬件描述语言开发了TCP/IP协议的固件实现，可以与WR知识产权核心耦合。结果LHAASO KM2A分布式数据和时钟同步网络 满足了阵列对可靠数据传输和时钟同步的高要求。结论基于TCP/IP协议族和WR的数据传输方法可以在Xilinx Spartan6 FPGA上运行，资源需求低，大大扩展了其应用领域。
BackgroundThe large high-altitude air shower observatory (LHAASO) is being built near Daocheng (4410 m a.s.l.) in the Sichuan province of China. Its main instrument is the one-kilometer square extensive air shower array (KM2A) which will comprise nearly 7000 detectors. The system adopts a distributed architecture where each detector has local front-end electronics for signal digitization and transmission. White Rabbit (WR) is the communication protocol used within KM2A to reach the required 1-ns synchronization accuracy between detectors.PurposeTo provide data transport and synchronization over the same network.MethodsWe have developed a firmware implementation of the TCP/IP protocol in Verilog hardware description language that can be coupled with a WR intellectual property core.ResultsLHAASO KM2A distributed data and clock synchronization network meets the high requirement of the array for reliable data transmission and clock synchronization.ConclusionThe data transmission method based on the TCP/IP protocol suite and WR can be run in Xilinx Spartan6 FPGA with low resource needs, which greatly expand its application field.