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核聚变与等离子体物理 ›› 2020, Vol. 40 ›› Issue (4): 372-378.DOI: 10.16568/j.0254-6086.202004013

• 等离子体应用 • 上一篇    下一篇

气压对于低气压双频容性耦合Ar/O2 等离子体放电特性影响的研究

 吴良超,殷桂琴*,孟祥国,周有有,王兢婧   

  1.  (西北师范大学物理与电子工程学院,兰州 730070)
  • 收稿日期:2019-04-15 修回日期:2020-04-14 出版日期:2020-12-15 发布日期:2021-06-03
  • 作者简介:吴良超(1993-),男,甘肃临夏人,硕士研究生,从事低温等离子体物理研究。
  • 基金资助:
     国家自然科学基金(11665021)

 Study on the effect of atmospheric pressure on the discharge characteristics of capacitively coupled Ar/O2 plasma at low pressure

 WU Liang-chao, YIN Gui-qin, MENG Xiang-guo, ZHOU You-you, WANG Jin-jing   

  1.  (School of Physics and Electronic Engineering, Northwestern Normal University, Lanzhou, 730070)
  • Received:2019-04-15 Revised:2020-04-14 Online:2020-12-15 Published:2021-06-03
  • Supported by:
     

摘要:  研究了气压对双射频氩氧混合等离子体电子温度和电子密度的影响。在13.56MHz低频功率和94.92MHz高频功率固定为60W和氩氧气体比为1:9的情况下,利用发射光谱法分析了气压不同时氩氧混合等离子体的放电光谱中的特征谱线的变化规律。使用一维质点网格法(PIC-MC)静电模型计算了电子温度和电子密度。结果表明:电子温度随着气压的增加先降低后升高,与实验结果趋势相吻合;电子密度随着气压的增加先增大后减小。

 

关键词:  , 双频容性耦合等离子体;发射光谱法;蒙特卡罗碰撞方法;等离子体清洗

Abstract:  Influence of gas pressure on electron temperature and electron density of argon-oxygen plasma induced by dual radio frequency (RF) source with a high-frequency of 94.92MHz and a low-frequency of 13.56MHz is studied. Under the condition that the low-frequency power and the high-frequency power are fixed at 60W and the argon-oxygen gas ratio is 1:9, the characteristic lines in the discharge spectrum of the argon-oxygen mixed plasma at different pressures is analyzed. The electron temperature and electron density is simulated with the one-dimensional PIC-MC (Particle-in-cell and Monte-Carlo) electrostatic model. The results show that the electron temperature decreases first and then rises with the increase of air pressure, consistent with the experimental result; the electron density first increases and then decreases with the increase of air pressure.

Key words:  Dual-frequency capacitive coupled plasma, Emission spectrometry, Monte Carlo collision method, Plasma cleaning

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