Two-dimensional plasma density distributions in low-pressure gas discharges

2004 ◽  
Vol 30 (12) ◽  
pp. 1043-1051
Author(s):  
E. V. Berlin ◽  
S. A. Dvinin ◽  
V. V. Mikheev ◽  
M. O. Omarov ◽  
V. S. Sviridkina
Keyword(s):  
Plasma Density ◽  
Low Pressure ◽  
Two Dimensional ◽  
Gas Discharges ◽  
Density Distributions

scholarly journals Device for calibration of low pressure gauges development

2002 ◽  
Vol 2 (4) ◽  
pp. 189-195
Author(s):  
Z.D. Nikitovic
Keyword(s):  
High Vacuum ◽  
Low Pressure ◽  
Calibration Procedure ◽  
Vacuum System ◽  
Molecular Collision ◽  
Gas Discharges ◽  
Dry Air ◽  
Vacuum Region ◽  
Set Up ◽  
Made In

Vacuum system set-up is presented and used for calibration of pressure gauges in the region of rough vacuum, from 103 mbar to 10-1 mbar, with dry air. The capacitance manometer is used for the calibration of piezoresistant manometer, oil, mercury and mercury micrometers U manometers. The applicability of the experimental set-up and obtained results for the low pressure gauges calibration in the medium and high vacuum region is approved. It was shown how calibration of some cheaper pressure gauges might be performed and reliable measurements of the pressure may be made in the region that is of interest for atomic and molecular collision physics and low-pressure gas discharges. It was also shown that mentioned calibration procedure could be used for calibration of different U manometer types in order to renormalize older atomic and molecular collision data.

Dynamical Spectra in Two-Dimensional Dusty Plasmas

2022 ◽  
pp. 34-48
Author(s):  
Aamir Shahzad ◽  
Zakia Rafiq ◽  
Alina Manzoor ◽  
Muhammad Kashif
Keyword(s):  
Plasma Density ◽  
Coupling Parameter ◽  
Transient Behavior ◽  
Dynamical Structure ◽  
Two Dimensional ◽  
Debye Screening ◽  
Coulomb Coupling ◽  
Plasma State ◽  
Dynamical Spectra ◽  
Number Of Particles

Equilibrium molecular dynamics (EMD) simulation has been employed to explore the dynamical structure factors (DSFs) of two-dimensional (2D) dusty plasma systems for a wide domain of plasma parameters of Coulomb coupling (Γ) and Debye screening strength (κ). The influence of varying wave vectors (k) on plasma DSFs S (k, ω) have been reported with different combinations of plasma state points (Γ, κ). New simulations have been tested for the influence of different wave vectors on plasma density S (k, ω) in addition to different combinations of plasma state points. New results of plasma density S (k, ω) show that amplitude of oscillation and frequency will vary with increasing value of Coulomb coupling parameter (Γ) and Debye screening strength (κ). These simulation techniques show that transient behavior has been reported for frequency (ω) with various values of Debye screening strength (κ) and number of particles (N). Moreover, EMD simulation has been checked in order to investigate the behavior of plasma DSFs with increasing number of particles (N). The outcomes of EMD simulations are matched to earlier known numerical and experimental data. It has been shown that fluctuation of dynamical density increases at intermediate to higher values of coupling parameter. However, it shows less fluctuation at higher values of Debye screening strength (κ).

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