The effect of positive/negative ion on the dust grain charging process in a Vasyliunas-Cairns (VC)-distributed dusty plasma system

N AHMAD; A A ABID; Y AL-HADEETHI; M N S QURESHI; Saqib REHMAN

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The effect of positive/negative ion on the dust grain charging process in a Vasyliunas-Cairns (VC)-distributed dusty plasma system

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Charging mechanism of dust particles has been considered as a growing research area in dusty plasma physics because of its exciting results.In this paper,we consider a low-temperature non-equilibrium multispecies plasma model,which consists of Vasyliunas-Caims (VC) distributed electrons,negative/positive streaming ions,and negatively-charged dust grains to explain the charging mechanism of dust grains.The main theme of this work is to derive expressions of currents for negatively-charged dust grains (considering an equilibrium state position) in the plasma environment comprised of electrons and positive/negative streaming ions using the VC distribution function.Our proposed model shows that the dust grain surface potential is significantly affected by different plasma parameters such as the negative ion streaming velocity (Sn),positive ion streaming velocity (Si),spectral indices of VC distribution,negative ion charging state (Zn),positive ion charging state (Zi),and negative ion number density (ρ).

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《等离子体科学和技术：英文版》 |2019年第6期|58-62|共5页
作者
N AHMAD; A A ABID; Y AL-HADEETHI; M N S QURESHI; Saqib REHMAN;
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作者单位

Department of Engineering and Applied Physics;

University of Science and Technology of China;

Hefei 230026;

People's Republic of China;

CAS Key Laboratory of Geospace Environment;

Department of Geophysics and Planetary Science;

University of Science and Technology of China;

Hefei 230026;

People's Republic of China;

Department of Physics;

Faculty of Sciences;

King Abdulaziz Unniversity;

Jeddah 21589;

Saudi Arabia;

Department of Physics;

GC University;

Lahore 54000;

Pakistan;

Department of Chemical Physics;

University of Science and Technology of China;

Hefei 230026;

People's Republic of China;

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原文格式 PDF
正文语种 chi
中图分类原子能技术;
关键词
dust; grain; surface; potential; vasyliunas-cairns; power; law; velocity; distribution; function; multi; species; plasma;

The effect of positive/negative ion on the dust grain charging process in a Vasyliunas-Cairns (VC)-distributed dusty plasma system

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