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The timing system of the Neutral Beam Injector on EAST

Plasma Science and Technology 2015年第5期17卷 425-429页

作者：盛鹏胡纯栋赵远哲崔庆龙张小丹吴德云张睿林宇莲 NBI team Institute of Plasma Physics Chinese Academy of Sciences

In order to synchronize the elements of the EAST Neutral Beam Injector （NBI） spatially located in several places, a distributed timing system （TS） is developed in this paper. The timing system provides a clock reference for synchronization and an interlock protection of the EAST NBI system. It sends timing signals to field devices, controls the pulse widths of the timing sequences, and provides a sampling clock for the Data Acquisition system （DAS）. The timing system also generates analog waveforms to control power supplies and gas supplies according to the operator＇s configuration. The timing system is developed on a PXI （PCI eXtensions for Instrumentation） platform consisting of a LabVIEW workstation and a timing control terminal. The timing control terminal consists of a timing node and several control interface crates. Two timing nodes are configured in one beam line. Each node is responsible for the timing sequence, analog generation and feedback control for one ion source. The architecture and implementation of the timing system are presented in this paper.

关键词： timing system neutral beam injector EAST timing sequence

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Technique research of event-based timing system

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Radiation Detection Technology and Methods 2020年第1期4卷 1-9页

作者： Zhi Liu Ge Lei Guang-Lei Xu University of Chinese Academy of Sciences Beijing 100049China Institute of High Energy Physics CASBeijing 100049China

Background The timing system of BEPC-Ⅱis established based on event generator and event receiver(EVR)modules from the Micro-Research *** it works smoothly,there are some downsides;for example,the output pulses cannot be adjusted in picosecond accuracy in EVRs,and additional hardware modules besides EVR had to be developed to generate the revolution frequency of synchrotron radiation ring of BEPC-Ⅱ.Purpose The purpose is to research the technique details of event timing system and to develop hardware modules by our-selves using FPGA,based on which further improvement in BEPC-Ⅱtiming system can be *** The homemade hardware cards have run successfully and generated synchronous trigger pulses and *** jitter is under 15 ps.

关键词： timing system Synchronization GTX transceiver

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Design of LEAF control system

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Radiation Detection Technology and Methods 2019年第4期3卷 12-17页

作者： Yu-Hui Guo Nian Xie Zhang-Nuo Chen Tai-Xin Zhan Yi Cheng Yun-Jie Li Xiao-Jun Liu Liang-Ting Sun Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China

Background LEAF is a complicated and integrated facility,which includes several different *** order to realize the remote control of field equipment and meet the requirements of the beam commissioning,a LEAF control system has been *** developed control system includes the following sub-systems:timing systems,data archiving systems,personnel safety systems,and machine protection *** The control system for LEAF is developed using the EPICS software toolset and the distributed control *** is designed in a three-layer *** the equipment layer,the control of the low-level equipment is mainly done by various industrial controllers,including programmable logic controllers,controllers for serial devices,and motion controllers based on EtherCAT *** the middle layer,the Ethernet switches are used to implement a Gigabit local area *** the operation layer,high-level application software has been developed for the beam commissioning and the operation of the *** The designed system can realize remote monitoring and control of field devices,provide synchronous timing and machine protection for key equipment,and automatically archive historical data for on-site running *** The complete system has a clear structure and stable operation and has been successfully applied to beam commissioning and operation of the LEAF facility.

关键词： EPICS PLC timing system Machine protect system Data archiver system

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