Theoretical research on the transport and ionization rate coefficients in glow discharge dusty plasma  

作　　者：Yonggan LIANG Jian WU Hui LI Ruihuan TIAN Chengxun YUAN Ying WANG Zhongxiang ZHOU Hao TIAN 梁勇敢;吴健;李辉;田瑞焕;袁承勋;王莹;周忠祥;田浩(School of Physics,Harbin Institute of Technology,Harbin 150001,People’s Republic of China;National Key Laboratory of Electromagnetic Environment(LEME),China Research Institute of Radio Wave Propagation,Beijing 102206,People’s Republic of China)

机构地区：[1]School of Physics,Harbin Institute of Technology,Harbin 150001,People’s Republic of China [2]National Key Laboratory of Electromagnetic Environment(LEME),China Research Institute of Radio Wave Propagation,Beijing 102206,People’s Republic of China

出　　处：《Plasma Science and Technology》2020年第3期17-23,共7页等离子体科学和技术（英文版）

基　　金：National Natural Science Foundation of China(Nos.11775062 and 61601419);the Key Laboratory Foundation of National Key Laboratory of Electromagnetic Environment(No.614240319010303).

摘　　要：The electron kinetic model for investigating the transport and ionization rate coefficients of argon glow discharge dusty plasma is developed from the Boltzmann equation.Both of the electron-neutral and electron-dust collisions are considered as collision terms in the kinetic equation.The kinetic equation is simplified by employing the local approximation and nonlocal approach under the same discharge conditions,and the corresponding simplified kinetic equations are known as local and nonlocal kinetic equations respectively.Then the electron energy distribution function(EEDF)is obtained by numerically solving the local and nonlocal kinetic equations and the dust charging equations simultaneously.Based on the obtained EEDFs,the effective electron temperature,electron mobility,electron diffusion coefficient and ionization rate coefficient are calculated for different discharge conditions.It is shown that the EEDFs calculated from the local kinetic model clearly differ from the nonlocal EEDFs and both the local and nonlocal EEDFs are also clearly different with Maxwellian distributions.The appearance of dust particles results in an obvious decrease of high energy electrons and increase of low energy electrons when axial electric field is low.With the increase of axial electric field,the influence of dust particles on the EEDFs becomes smaller.The electron mobility and diffusion coefficients calculated on the basis of local and nonlocal EEDFs do not differ greatly to the dust-free ones.While,when dust density nd=10^6 cm^?3,the electron mobility increases obviously compared with the dust-free results at low axial electric field and decreases with the increasing axial electric field until they are close to the dust-free ones.Meanwhile,electron diffusion coefficients for dusty case become smaller and decrease with the increasing axial electric field.The ionization rate coefficients decrease when dust particles are introduced and they approach the dust-free results gradually with the increasing axial electric field.

关 键 词：GLOW discharge DUSTY plasma kinetic model TRANSPORT COEFFICIENT IONIZATION rate COEFFICIENT 

分 类 号：O461.21[理学—电子物理学] O53[理学—物理]