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

Sheng ZHANG; Jinlong ZHAO; Liqun HU; Yebin CHEN; Xiuli SHENG

doi:10.11889/j.0253-3219.2017.hjs.40.080401

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

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-19

- ITER detection system of soft X-ray and electro-magnetic compatibility design
- NUCLEAR TECHNIQUES Vol. 40, Issue 8, Article number: 080401(2017)
- 作者机构：
  
  1.中国科学院等离子体物理研究所合肥 230031
  2.中国科学技术大学合肥 230026
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;Plasma Physics Prospective Subjects
- DOI：10.11889/j.0253-3219.2017.hjs.40.080401
  CLC： TU856;TL62
- Received：20 January 2017，
  
  Revised：11 April 2017，
  
  Published：10 August 2017
- 稿件说明：
移动端阅览
Sheng ZHANG, Jinlong ZHAO, Liqun HU, et al. ITER detection system of soft X-ray and electro-magnetic compatibility design[J]. Nuclear techniques, 2017, 40(8): 080401
DOI：

Sheng ZHANG, Jinlong ZHAO, Liqun HU, et al. ITER detection system of soft X-ray and electro-magnetic compatibility design[J]. Nuclear techniques, 2017, 40(8): 080401 DOI： 10.11889/j.0253-3219.2017.hjs.40.080401.

摘要

国际热核聚变实验反应堆是世界上在建的最大的磁约束聚变装置托克马克装置，通过对其中软X射线的测量，可实现等离子体辐射对锯齿、色骨模等磁流体现象的物理研究和成像反演。软X射线诊断系统就是用来检测软X射线的设备。由于热核聚变时恶劣电磁环境及远距离传输，在设计信号检测系统时必须进行电磁兼容设计，以降低系统噪声、提高检测精度。本文中使用的检测电路采用差分结构实现电流信号到电压信号的转换，重点研究检测电路的实现及其电磁兼容设计。从电磁抗干扰的三要素出发，结合实验测试，针对电磁干扰的特殊性，讨论了滤波电路设计、印制电路板（Printed Circuit Board，PCB）走线、电磁屏蔽及信号接地在系统中实现。本文采用32通道板卡集成设计；信号增益提高至10

V·A

-1

；放大器带宽达到120 kHz。通过测试结果可以看出，信号噪声降至8 mV。通过优化设计提高了检测电路的集成度和放大电路的增益及带宽，同时降低了检测电路的噪声。

Abstract

Background

The primary diagnostic role of radial X-ray camera (RXC) includes measuring low (

) 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 10

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.

关键词

Keywords

references

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