Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (4): 40402-040402.doi: 10.11889/j.0253-3219.2015.hjs.38.040402


Design of the PLC based switch control system for neutron beam line

SUN Yuan1,2 ZHOU Aiyu1,2,3 XIAO Songwen1,2 WU Yanyan1,2 HAN Qingfu1,2,3 ZHU Tao4   

  1. 1(China Spallation Neutron Source, Institute of High Energy Physics, Chinese Academy of Sciences, Dongguan 523803, China) 2(Dongguan Institute of Neutron Source, Dongguan 523808, China) 3(Beijing Synchrotron Radiation Facility, Institute of Energy Physics, Chinese Academy of Sciences, Beijing 100049, China) 4(Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China)
  • Received:2014-12-26 Revised:2015-01-07 Online:2015-04-10 Published:2015-04-09

Abstract: Background: The Multi-purpose Reflectometer (MR) is one of the three spectrometers in the first-phase construction of the China Spallation Neutron Source (CSNS). The neutron beam line switch plays an important role in MR of the neutron beam. Purpose: This study aims to design high precision and high reliability switching control of the neutron beam line in MR that guarantees the security of operators and devices. Methods: A programmable logic controller (PLC) is employed as kernel processor, a step motor as driving component, and a high precision circular grating for position-feedback. Redundancy of the protective design and error handling is taken to ensure that the system is working steadily and safely. Results: Simulation test showed that the system can deal with error condition safely and maintain a stable running. A repeat positioning accuracy of 16.2″ is achieved during the no load test. Conclusion: The results of tests show that the design of our neutron beam line switch control system can satisfy the experiment requirements in MR.

Key words: Programmable logic controller (PLC), Neutron beam line switch, High precision