介绍了在兰州近代物理所建设的兰州重离子加速器冷却储存环外靶实验读出电子学预研系统中触发系统的需求特点以及基于PXI(PCI eXtensions for Instrumentation)总线规范进行触发系统的设计研究。触发系统根据高能物理实验特点将各探测...介绍了在兰州近代物理所建设的兰州重离子加速器冷却储存环外靶实验读出电子学预研系统中触发系统的需求特点以及基于PXI(PCI eXtensions for Instrumentation)总线规范进行触发系统的设计研究。触发系统根据高能物理实验特点将各探测器的电子学通道输入信号进行分级处理,产生携带触发信息的次级触发信号上传至上一级触发处理模块,并最终结合整个系统的各子触发信号,产生最终的触发信号发送至各子探测器系统用于触发判选。通过与探测器进行的联合调试,验证了基于PXI总线构架的触发系统的功能和指标,并为完整系统的设计和扩展提供了一个重要的参考。展开更多
High precision time measurement is required in the readout of the neutron wall and TOF walls in the external target experiment of the Cooling Storage Ring(CSR) project in the Heavy Ion Research Facility in Lanzhou(HIR...High precision time measurement is required in the readout of the neutron wall and TOF walls in the external target experiment of the Cooling Storage Ring(CSR) project in the Heavy Ion Research Facility in Lanzhou(HIRFL).Considering the time walk correction,both time and charge are measured in the readout electronics.In this 16-channel measurement module,time and charge information are digitized by TDCs at the same time based on the Time-Over-Threshold(TOT) method;meanwhile,by employing high-density ASIC chips,the electronics complexity is effectively reduced.Test results indicate that this module achieves a time resolution better than 25 ps and a charge resolution better than 5%over the input amplitude range from 50 mV to 3V.展开更多
文摘介绍了在兰州近代物理所建设的兰州重离子加速器冷却储存环外靶实验读出电子学预研系统中触发系统的需求特点以及基于PXI(PCI eXtensions for Instrumentation)总线规范进行触发系统的设计研究。触发系统根据高能物理实验特点将各探测器的电子学通道输入信号进行分级处理,产生携带触发信息的次级触发信号上传至上一级触发处理模块,并最终结合整个系统的各子触发信号,产生最终的触发信号发送至各子探测器系统用于触发判选。通过与探测器进行的联合调试,验证了基于PXI总线构架的触发系统的功能和指标,并为完整系统的设计和扩展提供了一个重要的参考。
基金Supported by the Knowledge Innovation Program of the Chinese Academy of Sciences(No.KJCX2-YW-N27)the National Natural Science Foundation of China(No.11079003)
文摘High precision time measurement is required in the readout of the neutron wall and TOF walls in the external target experiment of the Cooling Storage Ring(CSR) project in the Heavy Ion Research Facility in Lanzhou(HIRFL).Considering the time walk correction,both time and charge are measured in the readout electronics.In this 16-channel measurement module,time and charge information are digitized by TDCs at the same time based on the Time-Over-Threshold(TOT) method;meanwhile,by employing high-density ASIC chips,the electronics complexity is effectively reduced.Test results indicate that this module achieves a time resolution better than 25 ps and a charge resolution better than 5%over the input amplitude range from 50 mV to 3V.
