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核聚变与等离子体物理 ›› 2006, Vol. 26 ›› Issue (4): 306-309.

• 研究报告 • 上一篇    下一篇

高信噪比Langmuir探针系统

李亚磊,邓新绿,俆 军,丁万昱   

  1. (大连理工大学三束材料改性国家重点实验室,大连 116024)
  • 收稿日期:2005-12-23 修回日期:2006-08-25 出版日期:2006-12-15 发布日期:2011-12-26
  • 作者简介:李亚磊(1980-),男,河北保定人,大连理工大学物理系硕士研究生,主要从事等离子体诊断方面的研究。
  • 基金资助:

    国家自然科学基金资助项目(50390060)

High signal-to-noise ratio Langmuir probe system

LI Ya-lei,DENG Xin-lu,XU Jun,DING Wan-yu   

  1. (State Key Laboratory for Materials Modification by Electron,Ion and Laser Beams, Dalian University of Technology,Dalian, 116024)
  • Received:2005-12-23 Revised:2006-08-25 Online:2006-12-15 Published:2011-12-26

摘要:

介绍了一套以积分网络为基础的新型Langmuir探针系统。该系统使用积分网络进行数据采集,在数据采集过程中同步完成模/数转换,有效地抑制了噪音干扰。以数据采集卡为接口与计算机系统进行数据通信,提出了一种在等离子体诊断中有效抵制噪音干扰的方法,大幅度提高了探针的信噪比。探针系统已成功地应用于ECR等离子体源中。实验表明:该探针系统具有良好的抗干扰效果,得到的I-V特性曲线平滑,无明显的背景干扰信号,获得高出普通Langmuir探针10.9dB的探针信噪比。

关键词: Langmuir探针, 等离子体诊断, 抗干扰, 信噪比, I-V特性曲线

Abstract:

A new Langmuir probe system based on integrator is introduced. New features of the system include: the integrator network to implement the process of analog-to-digital conversion and to provide effective noise suppression; data processing card to communicate with the host computer. It gives a noise elimination method which increased signal-to-noise ratio dramatically. Successful operation of the system has been demonstrated in the electrically noisy environment of an ECR plasma source.

Key words: Langmuir probe, Plasma diagnostics, Noise elimination, Signal-to-noise ratio, I-V characteristics curve

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