Nuclear Science and Techniques ›› 2019, Vol. 42 ›› Issue (2): 20202-020202.doi: 10.11889/j.0253-3219.2019.hjs.42.020202

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Design and implementation of wide range and high precision electron gun control system

Yongqi LIAO1,2,Shengli WANG1(),Honglei GUO1,Deming LI1   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-12-10 Revised:2018-12-29 Online:2019-02-10 Published:2019-02-19
  • Contact: Shengli WANG E-mail:wangshengli@sinap.ac.cn
  • About author:LIAO Yongqi, famale, born in 1994, graduated from Sichuan University in 2016, master student, focusing on accelerator control|LIAO Yongqi, famale, born in 1994, graduated from Sichuan University in 2016, master student, focusing on accelerator control|WANG Shengli, E-mail:<email>wangshengli@sinap.ac.cn</email>

Abstract: Background

Tungsten wire cathode thermal emission electron gun is adopted for the high frequency and high voltage electron accelerator and beamline project, but no commercial control system is available for this kind of electronic gun.

Purpose

This study aims to design and implement the control system of the Tungsten cathode thermal radiation electron gun for "1.2 MeV/10 mA high frequency and high voltage electron accelerator and beam line" project.

Methods

Based on understanding the composition and working principle of the system, the tripole flat-plate thermal cathode was employed in the electron gun that adopted tungsten wire as the cathode material. The filament heating power was supplied by the generator, and the extraction voltage was obtained by the partial voltage of the accelerating tube electrode. Its control system was designed and implemented by using programmable logic controller (PLC) while the general software LabVIEW was used in the host computer, and communication between host computer and PLC was achieved via the Object Linking and Embedding for process control (OPC) interface.

Results

Experimental results showed that the direct current electron beam in the range of 1 μA~50 mA was produced from this designed electron gun which could be controlled by the host computer.

Conclusion

As a device controller in the control system, the PLC together with LabVIEW programming in host computer can achieve reliable, flexible and efficient control of electron gun through OPC) interface.

Key words: Electron gun control system, PLC, OPC, LabVIEW

CLC Number: 

  • TL99