Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (8): 80401-080401.doi: 10.11889/j.0253-3219.2017.hjs.40.080401

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

ITER detection system of soft X-ray and electro-magnetic compatibility design

ZHANG Sheng1,2, ZHAO Jinlong1, HU Liqun1, CHEN Yebin1, SHENG Xiuli1   

  1. 1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
    2. University of Science and Technology of China, Hefei 230026, China
  • Received:2017-01-20 Revised:2017-04-11 Online:2017-08-10 Published:2017-08-11
  • Supported by:
    Supported by National Natural Science Foundation of China (No.11261140328),Plasma Physics Prospective Subjects (No.JSPS-NRF-NSFCA3)

Abstract: Background: The primary diagnostic role of radial X-ray camera (RXC) includes measuring low (m,n) magnetohydrodynamic modes, sawteeth and disruption precursors, H-mode, edge-localized modes, and L-H transition. Purpose:According to the soft X-ray weak signal detection requirements of international thermonuclear experimental reactor (ITER) tokamak, considering the harsh electro-magnetic environment and long distance transmission of signal, some appropriate electromagnetic protection measurements must be took in the design of soft X-ray diagnosis system in order to suppress circuit noise. Methods: In this thesis, a differential circuit structure has been designed to accomplish current-to-voltage conversion, and studying the electro-magnetic compatibility is the point. Results: Associated with experimental test and complied with three factors of electro-magnetic interference, the paper has discussed the application of shielding, grounding, filtering, and printed circuit board (PCB) layout methods in circuit, and completed the circuit requirements of system miniaturization, high parameters with quantity of 32 channels per PCB board, gain of 107 V·A-1, width of 120 kHz, and noise of 8 mV. Conclusion: The effective detection of weak current signal and steady performance are proved by test results. The effect of electromagnetic protective measurements adopted is reasonable and obvious.

Key words: Soft X-ray detection, Electromagnetic compatibility, Low-pass filter, PCB anti-interference

CLC Number: 

  • TU856