TY - JOUR

T1 - The nonlocal electron kinetics for a low-pressure glow discharge dusty plasma

AU - Liang, Yonggan

AU - Ying, Wang

AU - Liu, Hui

AU - Hao, Tian

AU - Yuan, Chengxun

AU - Kudryavtsev, A.A.

AU - Rabadanov, K.M.

AU - Wu, Jian

AU - Zhou, Zhongxiang

AU - Tian, Ruihuan

PY - 2018/5/1

Y1 - 2018/5/1

N2 - The nonlocal electron kinetic model based on the Boltzmann equation is developed in low-pressure argon glow discharge dusty plasmas. The additional electron-dust elastic and inelastic collision processes are considered when solving the kinetic equation numerically. The orbital motion limited theory and collision enhanced collection approximation are employed to calculate the dust surface potential. The electron energy distribution function (EEDF), effective electron temperature T eff, and dust surface potential are investigated under different plasma and dust conditions by solving the Boltzmann and the dust charging current balance equations self-consistently. A comparison of the calculation results obtained from nonlocal and local kinetic models is made. It is shown that the appearance of dust particles leads to a deviation of the EEDF from its original profile for both nonlocal and local kinetic models. With the increase in dust density and size, the effective electron temperature and dust surface potential decrease due to the high-energy electron loss on the dust surface. Meanwhile, the nonlocal and local results differ much from each other under the same calculation condition. It is concluded that, for low-pressure (PR ≤ 1 cm∗Torr) glow discharge dusty plasmas, the existence of dust particles will amplify the difference of local and nonlocal EEDFs, which makes the local kinetic model more improper to determine the main parameters of the positive column. The nonlocal kinetic model should be used for the calculation of the EEDFs and dusty plasma parameters.

AB - The nonlocal electron kinetic model based on the Boltzmann equation is developed in low-pressure argon glow discharge dusty plasmas. The additional electron-dust elastic and inelastic collision processes are considered when solving the kinetic equation numerically. The orbital motion limited theory and collision enhanced collection approximation are employed to calculate the dust surface potential. The electron energy distribution function (EEDF), effective electron temperature T eff, and dust surface potential are investigated under different plasma and dust conditions by solving the Boltzmann and the dust charging current balance equations self-consistently. A comparison of the calculation results obtained from nonlocal and local kinetic models is made. It is shown that the appearance of dust particles leads to a deviation of the EEDF from its original profile for both nonlocal and local kinetic models. With the increase in dust density and size, the effective electron temperature and dust surface potential decrease due to the high-energy electron loss on the dust surface. Meanwhile, the nonlocal and local results differ much from each other under the same calculation condition. It is concluded that, for low-pressure (PR ≤ 1 cm∗Torr) glow discharge dusty plasmas, the existence of dust particles will amplify the difference of local and nonlocal EEDFs, which makes the local kinetic model more improper to determine the main parameters of the positive column. The nonlocal kinetic model should be used for the calculation of the EEDFs and dusty plasma parameters.

KW - CRYSTAL

KW - FLUID MODELS

KW - GAS-DISCHARGE

KW - PARTICLES

KW - POSITIVE-COLUMN

UR - https://aip.scitation.org/doi/10.1063/1.5025140

UR - http://www.scopus.com/inward/record.url?scp=85046872219&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/nonlocal-electron-kinetics-lowpressure-glow-discharge-dusty-plasma

U2 - 10.1063/1.5025140

DO - 10.1063/1.5025140

M3 - Article

VL - 25

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 5

M1 - 053702

ER -