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Related Experiment Videos

Plasma "bullet" with hollow structure: formation and evolution.

Zhengshi Chang1, Ni Zhao2, Guoqiang Li2

  • 1State Key Laboratory of Electrical Insulation and Power Equipment, The School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China. zschang1984@xjtu.edu.cn.

Scientific Reports
|May 17, 2018
PubMed
Summary
This summary is machine-generated.

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Researchers investigated the hollow structure in atmospheric pressure plasma jets (APPJs). Special experiments clarified the significant contribution of the Penning effect to hollow structure formation in APPJs.

Area of Science:

  • Plasma Physics
  • Atomic and Molecular Physics
  • Chemical Physics

Background:

  • The hollow structure of plasma bullets, observed since 2005, is a critical phenomenon in atmospheric pressure plasma jets (APPJs).
  • Understanding the underlying mechanism is crucial for both fundamental research and practical applications of APPJs.
  • A significant debate exists between experimental and numerical simulation researchers regarding the primary cause of this hollow structure.

Purpose of the Study:

  • To resolve the ongoing debate concerning the formation mechanism of the hollow structure in plasma bullets.
  • To clarify the precise contribution of the Penning effect to the hollow structure phenomenon.
  • To provide a comprehensive understanding based on experimental evidence.

Main Methods:

Related Experiment Videos

  • Conducting specialized experiments designed to isolate and analyze the factors contributing to the hollow structure.
  • Comparing experimental observations with theoretical models and previous research findings.
  • Analyzing the phenomena and underlying mechanisms through detailed investigation.

    • Main Results:

    • Experimental results provide a clearer picture of the hollow structure formation process.
    • The study quantifies the contribution of the Penning effect, addressing the divergence in previous research.
    • A better comprehension of the interplay between impurities, the Penning effect, and hollow structure is achieved.

    Conclusions:

    • The Penning effect plays a significant role in the formation of the hollow structure in plasma jets.
    • Experimental evidence supports a more definitive understanding compared to previous numerical simulations.
    • The findings offer insights into controlling and optimizing plasma jet characteristics for various applications.