Quantitative simulations of ratchet potential in a dusty plasma ratchet

2021 ◽  
Author(s):  
Shuo Wang ◽  
Ning Zhang ◽  
Shun-xin Zhang ◽  
Miao Tian ◽  
Ya-wen Cai ◽  
...  
Keyword(s):  
Dusty Plasma ◽  
Dust Particle ◽  
Cross Sections ◽  
Fluid Model ◽  
Charged Dust ◽  
Two Dimensional ◽  
Plasma Parameters ◽  
Capacitively Coupled ◽  
Electric Potentials ◽  
Ratchet Potential

Abstract Using a dusty plasma ratchet, one can realize the rectification of charged dust particle in a plasma. To obtain the ratchet potential dominating the rectification, here, we perform quantitative simulations based on a two-dimensional fluid model of capacitively coupled plasma. Plasma parameters are firstly calculated in two typical cross sections of the dusty plasma ratchet which cut vertically the saw channel at different azimuthal positions. The balance positions of charged dust particle in the two cross sections then can be found exactly. The electric potentials at the two balance positions have different values. Using interpolation in term of a double-sine function from previous experimental measurement, an asymmetrical ratchet potential along the saw channel is finally obtained. The asymmetrical orientation of the ratchet potential depends on discharge conditions. Quantitative simulations further reproduce our previous experimental phenomena such as the rectification of dust particle in the dusty plasma ratchet.

Simulaiton of the Dual Frequency Capacitively Coupled Ar Plasma Using Fluid Model in Semiconductor Technique

2014 ◽  
Vol 633-634 ◽  
pp. 887-890
Author(s):  
Xiao Wei Gu
Keyword(s):  
Fluid Model ◽  
Plasma Reactor ◽  
Energy Balance Equation ◽  
Two Dimensional ◽  
Dual Frequency ◽  
Plasma Parameters ◽  
Capacitively Coupled ◽  
Continuity Equations ◽  
Main Discharge ◽  
Coupled Plasmas

Low-pressure capacitively coupled plasmas are now widely used for plasma processing in the semiconductor technique. In this paper, a numerical simulation model was developed to simulate the plasma in a dual frequency capacitively coupled plasma reactor based on a two-dimensional, self-consistent fluid model. The aim of our work is to provide estimates of the main discharge and plasma parameters and to help understand the basic mechanisms governing the CCP etching devices. Accurate solutions of the continuity equations, electron energy balance equation and possion's equation with realistic boundary conditions are obtained. The numerical results are used to analyze the plasma density distribution for one and two dimensional on whole plasma reactor.

scholarly journals Dynamical states in two-dimensional charged dust particle clusters in plasma medium

2020 ◽  
Vol 102 (2) ◽  
Author(s):  
Srimanta Maity ◽  
Priya Deshwal ◽  
Mamta Yadav ◽  
Amita Das
Keyword(s):  
Dust Particle ◽  
Charged Dust ◽  
Two Dimensional ◽  
Plasma Medium

Frequency effects in capacitively coupled radio‐frequency glow discharges: A comparison between experiments and a two‐dimensional fluid model

1994 ◽  
Vol 64 (14) ◽  
pp. 1780-1782 ◽  
Author(s):  
P. M. Meijer ◽  
J. D. P. Passchier ◽  
W. J. Goedheer ◽  
J. Bezemer ◽  
W. G. J. H. M. van Sark
Keyword(s):  
Radio Frequency ◽  
Fluid Model ◽  
Two Dimensional ◽  
Capacitively Coupled ◽  
Frequency Effects ◽  
Glow Discharges

Modeling of a capacitively coupled radio-frequency methane plasma: Comparison between a one-dimensional and a two-dimensional fluid model

2002 ◽  
Vol 92 (5) ◽  
pp. 2290-2295 ◽  
Author(s):  
D. Herrebout ◽  
A. Bogaerts ◽  
M. Yan ◽  
R. Gijbels ◽  
W. Goedheer ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Fluid Model ◽  
Two Dimensional ◽  
Capacitively Coupled ◽  
One Dimensional

Dust acoustic shock waves in arbitrarily charged dusty plasma with low and high temperature non-thermal ions

2015 ◽  
Vol 93 (10) ◽  
pp. 1030-1038 ◽  
Author(s):  
Apul N. Dev ◽  
Jnanjyoti Sarma ◽  
Manoj K. Deka
Keyword(s):  
Shock Waves ◽  
Dusty Plasma ◽  
Burgers Equation ◽  
Perturbation Technique ◽  
Nonlinear Propagation ◽  
Dust Particles ◽  
Charged Dust ◽  
Plasma Parameters ◽  
Tanh Method ◽  
Dust Acoustic

Using the well-known reductive perturbation technique, the three-dimensional (3D) Burgers equation and modified 3D Burgers equation have been derived for a plasma system comprising of non-thermal ions, Maxwellian electrons, and negatively charged fluctuating dust particles. The salient features of nonlinear propagation of shock waves in such plasmas have been investigated in detail. The different temperature non-thermal ions and Maxwellian electrons are found to play an important role in the shock waves solution. The analytical solution of the 3D Burgers equation and modified 3D Burgers equation ratifying the propagation of dust acoustic shock waves are derived using the well-known tanh method. On increasing the population of non-thermal ions, an enhancement in the amplitude of shock waves is seen for negatively charged dust particles. A striking dependence of amplitude and width of shock waves on the ratio of ion temperatures and densities are also reported. Finally we introduced a new stretching coordinate and perturbation for the nth-order nonlinear 3D Burgers equation and its solution by the use of the tanh method. We found that, due to higher nonlinearity, the amplitude of shock waves decreases while width remains constant for all plasma parameters considered in the present investigation. The features accounted here could be relevant in the case of different space and astrophysical plasmas and laboratory dusty plasma for negatively charged dust fluctuation.

Two-Dimensional Numerical Study on Characterization of Low-Pressure Capacitively Coupled Argon Discharges

2014 ◽  
Vol 556-562 ◽  
pp. 1691-1695
Author(s):  
Ya Chun Zhang ◽  
Xiang He ◽  
Jian Pin Chen ◽  
Xiao Wu Ni ◽  
Jian Lu ◽  
...  
Keyword(s):  
Numerical Study ◽  
Fluid Model ◽  
Low Pressure ◽  
Two Dimensional ◽  
Capacitively Coupled ◽  
Positive Ions ◽  
Cell Reactor ◽  
Reactor Type ◽  
Gaseous Electronics Conference

This paper presents an investigation of argon capacitively coupled plasma at low pressure. A two-dimensional, time-dependent fluid model is used to describe the production, transport, and destruction of electrons and positive ions. The model is solved for a GEC(gaseous electronics conference) Cell reactor type (with 4cm diameter and 2.5cm interelectrode distance) operating at frequency 13.56MHz, pressure 1Torr and applied voltage 1000V, in pure argon. Two-dimensional distributions are presented in the stationary state, including electron temperature and species density i.e. electron, ion and metastable atom. The electric field and electric potential at different phases in one RF cycle is also studied.

Self-similar expansion of adiabatic electronegative dusty plasma

2017 ◽  
Vol 83 (6) ◽  
Author(s):  
M. Shahmansouri ◽  
A. Bemooni ◽  
A. A. Mamun
Keyword(s):  
Dusty Plasma ◽  
Dusty Plasmas ◽  
Adiabatic Index ◽  
The Self ◽  
Charged Dust ◽  
Plasma Expansion ◽  
Plasma Parameters ◽  
Dust Temperature ◽  
Self Similar ◽  
Expansion Of Space

The self-similar expansion of an adiabatic electronegative dusty plasma (consisting of inertialess adiabatic electrons, inertialess adiabatic ions and inertial adiabatic negatively charged dust fluids) is theoretically investigated by employing the self-similar approach. It is found that the effects of the plasma adiabaticity (represented by the adiabatic index $\unicode[STIX]{x1D6FE}$) and dusty plasma parameters (determined by dust temperature and initial dust population) significantly modify the nature of the plasma expansion. The implications of our results are expected to play an important role in understanding the physics of the expansion of space and laboratory electronegative dusty plasmas.

scholarly journals A numerical study of gravity-driven instability in strongly coupled dusty plasma. Part 1. Rayleigh–Taylor instability and buoyancy-driven instability

2021 ◽  
Vol 87 (2) ◽  
Author(s):  
Vikram S. Dharodi ◽  
Amita Das
Keyword(s):  
Dusty Plasma ◽  
Numerical Study ◽  
Fluid Model ◽  
Density Region ◽  
Strongly Coupled ◽  
Rising Bubble ◽  
Inhomogeneous Density ◽  
Gravity Driven ◽  
The Individual ◽  
Strongly Coupled Dusty Plasma

Rayleigh–Taylor (RT) and buoyancy-driven (BD) instabilities are driven by gravity in a fluid system with inhomogeneous density. The paper investigates these instabilities for a strongly coupled dusty plasma medium. This medium has been represented here in the framework of the generalized hydrodynamics (GHD) fluid model which treats it as a viscoelastic medium. The incompressible limit of the GHD model is considered here. The RT instability is explored both for gradual and sharp density gradients stratified against gravity. The BD instability is discussed by studying the evolution of a rising bubble (a localized low-density region) and a falling droplet (a localized high-density region) in the presence of gravity. Since both the rising bubble and falling droplet have symmetry in spatial distribution, we observe that a falling droplet process is equivalent to a rising bubble. We also find that both the gravity-driven instabilities get suppressed with increasing coupling strength of the medium. These observations have been illustrated analytically as well as by carrying out two-dimensional nonlinear simulations. Part 2 of this paper is planned to extend the present study of the individual evolution of a bubble and a droplet to their combined evolution in order to understand the interaction between them.

scholarly journals Numerical and Experimental Investigation of Longitudinal Oscillations in Hall Thrusters

Aerospace ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 148
Author(s):  
Vittorio Giannetti ◽  
Manuel Martín Saravia ◽  
Luca Leporini ◽  
Simone Camarri ◽  
Tommaso Andreussi
Keyword(s):  
Discharge Current ◽  
Fluid Model ◽  
Low Frequency ◽  
Hall Thruster ◽  
Hall Thrusters ◽  
Current Signal ◽  
Plasma Parameters ◽  
Plasma Properties ◽  
Breathing Mode ◽  
Spatio Temporal

One of the main oscillatory modes found ubiquitously in Hall thrusters is the so-called breathing mode. This is recognized as a relatively low-frequency (10–30 kHz), longitudinal oscillation of the discharge current and plasma parameters. In this paper, we present a synergic experimental and numerical investigation of the breathing mode in a 5 kW-class Hall thruster. To this aim, we propose the use of an informed 1D fully-fluid model to provide augmented data with respect to available experimental measurements. The experimental data consists of two datasets, i.e., the discharge current signal and the local near-plume plasma properties measured at high-frequency with a fast-diving triple Langmuir probe. The model is calibrated on the discharge current signal and its accuracy is assessed by comparing predictions against the available measurements of the near-plume plasma properties. It is shown that the model can be calibrated using the discharge current signal, which is easy to measure, and that, once calibrated, it can predict with reasonable accuracy the spatio-temporal distributions of the plasma properties, which would be difficult to measure or estimate otherwise. Finally, we describe how the augmented data obtained through the combination of experiments and calibrated model can provide insight into the breathing mode oscillations and the evolution of plasma properties.

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