Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (11): 110101-110101.doi: 10.11889/j.0253-3219.2014.hjs.37.110101

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS •     Next Articles

Research and design of high precision synchronization data acquisition system

ZHU Xiaohui1,2 TAN Songqing1 LI Rui1   

  1. 1(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 2(University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2014-06-30 Revised:2014-08-12 Online:2014-11-10 Published:2014-11-07

Abstract: Background: Shanghai Synchrotron Radiation Facility (SSRF) is an advanced third-generation synchrotron radiation electron accelerator. The synchrotron radiation devices require the magnets and magnet power supply of high performance, such as high precision and high stability. In the design of a magnet and a magnet power supply, the flux and current signals is required to be measured simultaneously. Purpose: In order to simultaneously measure the two signals with high precision, a high precision synchronization data acquisition system should be designed and implemented. Methods: An 18-bits, 5 MSPS analog to digital converter of AD7960 is used to realize the high precision data acquisition. The synchronizing trigger signal is produced by Field-Programmable Gate Array (FPGA), which is used to generate the control logic. Results: After the test of effective precision of Analog Digital Converter (ADC) and the synchronization performance, it is resulted that the effective precision of this system is better than 18 bits, and the performance of synchronization is great. Conclusion: The system proposed in this paper satisfies requirements of high precision synchronization data acquisition for SSRF.

Key words: Data acquisition system, High precision, Synchronous sampling, Analog Digital Converter (ADC), Ethernet, Magnet power supply