Journal of Hebei University(Natural Science Edition) >

2023 , Vol. 43 >Issue 5: 470 - 475

DOI: https://doi.org/10.3969/j.issn.1000-1565.2023.05.004

Charge of dielectric particle deep into the plasma sheath in DC discharge

  • CAI Zhimin ,
  • ZHANG Ning ,
  • ZHANG Shunxin ,
  • WANG Shuo ,
  • LIU Fucheng ,
  • HE Yafeng
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  • College of Physics Science and Technology, Hebei University, Baoding 071002, China

Received date: 2022-11-27

  Online published: 2023-10-25

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Abstract

Aiming to understand the complex motion process of large dielectric particle in the DC discharge dusty plasma experiments, the electrical properties and charge of dielectric particle deep into the plasma sheath are studied by the theoretical analysis and numerical simulation. Results show that the electricity and the charge of large particle deep into the plasma sheath are completely different from that of the small particle suspended near the sheath boundary which were widely studied previously. When the distance between the particle and the electrode is less than 8.2 mm, the particle is positively charged. By modifying the calculation of ion charging current, the charge of particle with the radius of 250 μm is calculated to be about 5.2×106 e under the applied voltage of -280 V. This verifies previous experimental measurement results.

Key words： dusty plasma; dielectric particle; charge

Cite this article

CAI Zhimin , ZHANG Ning , ZHANG Shunxin , WANG Shuo , LIU Fucheng , HE Yafeng . Charge of dielectric particle deep into the plasma sheath in DC discharge[J]. Journal of Hebei University(Natural Science Edition), 2023 , 43(5) : 470 -475 . DOI: 10.3969/j.issn.1000-1565.2023.05.004

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