Macroparticle Movement Velocity in Dusty Structures of Various Compositions

TL;DR

This study experimentally investigates how the velocity of macroparticles in dusty plasma structures varies with gas pressure and composition, confirming some theoretical predictions and highlighting the need for further research on material differences.

Contribution

It provides experimental data on macroparticle velocities in dusty plasmas with various materials and gases, confirming inverse pressure-velocity relations and identifying areas for further study.

Findings

Velocity inversely proportional to gas pressure

Confirmed theoretical relation between velocity and pressure

Material differences in particle behavior require further research

Abstract

The results of experimental investigations of the movement velocity of a macroparticle in the dusty structures of various physicalchemical compositions formed in a stratified column of a dc glow discharge, are presented. The macroparticle substances are alumina (r = 10 - 35 microns), polydisperse Zn (r = 1 - 20 microns) and Zn0 (r = 20 - 35 microns). Plasma-forming gases are inert gases (Ne, Ar). The inverse relation between the velocity and the gas pressure (in the range 40-400 Pa) is found and, for the same material of macroparticles in different gas plasmas, is confirmed by theory and does not contradict observations. But, to explain a difference of quantitative data for macroparticles made from different materials in Ar plasma, the additional research is required.