Abstract: In order to improve the electric field strength inside the quartz tube of an atmospheric pressure plasma jet, a double-ring electrode dielectric barrier discharge reactor with argon as the working gas and internal floating electrodes is proposed in this paper. With the help of COMSOL Multiphysics simulation software, the internal axial electric field strengths of the pre-discharge of two different atmospheric pressure plasma jet devices, the traditional double-ring electrodes and the internal floating electrodes, are investigated. It was found that the internal peak axial electric field strength of the internal floating electrodes device increased by 82.3% compared with that of the conventional double-ring electrode- DOI:10.3969/j.issn.1000-1565.2025.06.005内置悬浮电极对大气压等离子体射流的光电特性影响单瑞康¹,王伟伟¹,侯佳讯¹,樊智慧¹,王景全¹,刘富成²,刘峰¹(1.河北工程大学 数理科学与工程学院,河北省计算光学成像与光电检测技术创新中心,河北省计算光学成像与智能感测国际联合研究中心,河北 邯郸 056038;2.河北大学 物理科学与技术学院,河北 保定 071002)摘 要:为了提高大气压等离子体射流石英管内的电场强度,提出了以氩气作为工作气体内置悬浮电极的双环电极介质阻挡放电反应器.借助COMSOL Multiphysics仿真软件研究了传统双环电极和内置悬浮电极2种不同大气压等离子体射流装置预放电的内部轴向电场强度.研究发现,相比于传统双环电极装置,内置悬浮电极装置内部轴向峰值电场强度增加了82.3%.随后系统地分析其电学和光学特性:在内置悬浮电极装置中,大气压等离子体射流的性能得到了显著提高,电流脉冲峰值、功率和谱线强度均有所增强,电子温度降低.验证了一种特殊的电极设计,该设计可以放大局部电场强度,产生高性能等离子体,同时抑制外部电场强度从而减小短路风险.关键词:介质阻挡放电;悬浮电极;局部增强电场;光电特性中图分类号:O461;O433 文献标志码:A 文章编号:1000-1565(2025)06-0601-08Influence of internal floating electrodes on the optical and electrical characteristics of atmospheric pressure plasma jetsSHAN Ruikang¹, WANG Weiwei¹, HOU Jiaxun¹, FAN Zhihui¹, WANG Jingquan¹, LIU Fucheng², LIU Feng¹(1. Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing,Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center,School of Mathematics and Physics, Hebei University of Engineering, Handan 056038, China,2.College of Physics Science and Technology, Hebei University, Baoding 071002, China)Abstract: In order to improve the electric field strength inside the quartz tube of an atmospheric pressure plasma jet, a double-ring electrode dielectric barrier discharge reactor with argon as the working gas and internal floating electrodes is proposed in this paper. With the help of COMSOL Multiphysics simulation software, the internal axial electric field strengths of the pre-discharge of two different atmospheric pressure plasma jet devices, the traditional double-ring electrodes and the internal floating electrodes, are investigated. It was found that the internal peak axial electric field strength of the internal floating electrodes device increased by 82.3% compared with that of the conventional double-ring electrode- 收稿日期:2025-03-27;修回日期:2025-05-27 基金项目:国家自然科学基金项目(11505045);河北省自然科学基金项目(A2012402002);邯郸市科学技术研究与发展计划项目(21422111227) 第一作者:单瑞康(2001— ),男,河北工程大学在读硕士研究生,主要从事等离子体放电特性方向研究.E-mail:srk15630325058@163.com 通信作者:刘峰(1978— ),男,河北工程大学教授,主要从事等离子体及其应用方向研究.E-mail:fengliu@hebeu.edu.cn 第6期单瑞康等:内置悬浮电极对大气压等离子体射流的光电特性影响河北大学学报(自然科学版) 第45卷device. Subsequently, the electrical and optical characteristics were systematically analyzed: in the internal floating electrodes device, the performance of the atmospheric-pressure plasma jet was significantly improved, the peak current pulse, power and spectral intensity were enhanced, and the electron temperature was reduced. This work validates a special electrode design that can amplify the local electric field strength to generate high-performance plasma while suppressing the external electric field strength to reduce the risk of short-circuit.

Key words: dielectric barrier discharge, floating electrode, locally enhanced electric field, optical and electrical characteristics