Kinetics Characteristics and Bremsstrahlung of Argon DC Discharge Under Atmospheric Pressure  

作　　者：何为 刘兴华 咸日常 陈素红 廖瑞金 杨帆 肖汉光 

机构地区：[1]State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University [2]Zibo Power Supply Company, Shandong Electric Power Corporation [3]Shandong Electric Power Research Institute, Shandong Electric Power Corporation

出　　处：《Plasma Science and Technology》2013年第4期335-342,共8页等离子体科学和技术（英文版）

基　　金：supported by the Major State Basic Research Development Program of China (973 Program) (No. 2011CB20941);Scientific Research Foundation of State Key Lab. of Power Transmission Equipment and System Security of China (No. 2007DA10512709102);National Natural Science Foundation of China (No. 51007096);the Fundamental Research Funds for the Central Universities of China(No. CDJZR10150001)

摘　　要：An improved self-consistent, multi-component, and one-dimensional plasma model for simulating atmospheric pressure argon glow discharge is presented. In the model, both the plasma hydrodynamics model and chemical model are considered. The numerical simulation is carried out for parallel-plate geometry with a separation of 0.06 cm. The results show that Ar＊ plays a major role in the discharge, which is mainly produced by ground state excitation reaction. The electron temperature reaches its maximum in the cathode sheath but maintains a low value （0.23 eV） in bulk plasma. Elastic collision is the dominant volumetric electron energy loss in atmosphere argon glow discharge, which is negligible in low pressure argon glow discharge. The metastable step-wise ionization is the main mechanism for electron production to sustain the discharge. However, the highest contribution to electron production rate is ground state ionization reaction. The bremsstrahlung power density is related to electric voltage. With the increase of the electric voltage, the bremsstrahlung power density increases, namely, the strength of ultraviolet radiation spectrum enhances in the cathode sheath.An improved self-consistent, multi-component, and one-dimensional plasma model for simulating atmospheric pressure argon glow discharge is presented. In the model, both the plasma hydrodynamics model and chemical model are considered. The numerical simulation is carried out for parallel-plate geometry with a separation of 0.06 cm. The results show that Ar＊ plays a major role in the discharge, which is mainly produced by ground state excitation reaction. The electron temperature reaches its maximum in the cathode sheath but maintains a low value （0.23 eV） in bulk plasma. Elastic collision is the dominant volumetric electron energy loss in atmosphere argon glow discharge, which is negligible in low pressure argon glow discharge. The metastable step-wise ionization is the main mechanism for electron production to sustain the discharge. However, the highest contribution to electron production rate is ground state ionization reaction. The bremsstrahlung power density is related to electric voltage. With the increase of the electric voltage, the bremsstrahlung power density increases, namely, the strength of ultraviolet radiation spectrum enhances in the cathode sheath.

关 键 词：atmospheric pressure glow discharge plasma model metastable argon atom ionization reaction bremsstrahlung power density 

分 类 号：O461.21[理学—电子物理学]