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An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
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[Automatic adjustment control system for DC glow discharge plasma source].

Zhen-zhen Wan1, Yong-qing Wang, Xiao-jia Li

  • 1Central Iron & Steel Research Institute, National Testing Center of Iron & Steel, Beijing 100081, China. emailwanzhenzhen@126.com

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|May 21, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces an automatic control system for DC glow discharge plasma sources, significantly improving voltage stability and analysis precision. The system enhances accuracy and reduces stabilization time compared to manual control methods.

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Area of Science:

  • Physics
  • Chemistry
  • Materials Science

Context:

  • DC glow discharge processes involve interdependent parameters: discharge current, voltage, and argon pressure.
  • Precise control of these parameters is crucial for stable plasma generation and accurate elemental analysis.
  • Manual control methods are prone to complex operations and human error, limiting accuracy and efficiency.

Purpose:

  • To develop and present an automatic control system for a DC glow discharge plasma source.
  • To automatically regulate discharge voltage by adjusting argon pressure while maintaining a constant discharge current.
  • To enhance the accuracy and reduce the time required for achieving stable glow discharge voltage.

Summary:

  • An automatic control system was designed, implemented, and tested for DC glow discharge.
  • The system adjusts argon pressure to maintain constant discharge voltage, improving accuracy from 4% FS to <1% FS.
  • Stabilization time was reduced from over 90s to within 30s, enhancing concentration analysis precision with RSDs <3.5% for various alloy samples.

Impact:

  • Significantly improved concentration analysis precision in middle-low alloy steel and tin bronze samples.
  • Reduced Relative Standard Deviations (RSDs) for multiple elements in standard samples, demonstrating enhanced analytical reliability.
  • The developed system offers a more accurate and efficient method for DC glow discharge control, benefiting various analytical applications.