Bohm criterion of plasma sheaths away from asymptotic limits
The plasma exit flow speed at the sheath entrance is constrained by the Bohm criterion. The
so-called Bohm speed regulates the plasma particle and power exhaust fluxes to the wall …
so-called Bohm speed regulates the plasma particle and power exhaust fluxes to the wall …
[HTML][HTML] Theory of the electron sheath and presheath
Electron sheaths are commonly found near Langmuir probes collecting the electron
saturation current. The common assumption is that the probe collects the random flux of …
saturation current. The common assumption is that the probe collects the random flux of …
Challenges and opportunities in verification and validation of low temperature plasma simulations and experiments
This paper describes the verification and validation (V&V) framework developed for the
stochastic Particle-in-Cell, Direct Simulation Monte Carlo code Aleph. An ideal framework for …
stochastic Particle-in-Cell, Direct Simulation Monte Carlo code Aleph. An ideal framework for …
Grid-assisted co-sputtering method: background, advancement, and prospect
A Kosari Mehr, A Kosari Mehr - Plasma Chemistry and Plasma Processing, 2021 - Springer
In this paper, the incorporation of auxiliary grids/electrodes into the design of the sputtering
method is scrutinized by studying the impact of factors such as grid size, grid position, grid …
method is scrutinized by studying the impact of factors such as grid size, grid position, grid …
Power law fitting of the ion saturation current and the three-temperature Maxwellian EEDF in a multi-dipole confined hot cathode discharge: an experimental …
CS Yip, C Jin, W Zhang, D Jiang… - Plasma Sources Science …, 2022 - iopscience.iop.org
Langmuir probe diagnostic in a multi-dipole confined hot cathode discharge has been
revisited with an improved sheath expansion model with fitted expansion parameters. The …
revisited with an improved sheath expansion model with fitted expansion parameters. The …
Plasma-sheath transition in multi-fluid models with inertial terms under low pressure conditions: Comparison with the classical and kinetic theory
We present high-order accuracy simulations of the plasma-sheath transition with an ion–
electron multi-fluid model that considers the electron inertial terms and the ion pressure …
electron multi-fluid model that considers the electron inertial terms and the ion pressure …
Determining the Bohm criterion in plasmas with two ion species
SD Baalrud, CC Hegna - Physics of Plasmas, 2011 - pubs.aip.org
A model that uniquely determines the flow speed of each ion species at the sheath edge of
two ion species plasmas is developed. In this analysis, ion-ion two-stream instabilities can …
two ion species plasmas is developed. In this analysis, ion-ion two-stream instabilities can …
How sheath properties change with gas pressure: modeling and simulation
LP Beving, MM Hopkins… - Plasma Sources Science …, 2022 - iopscience.iop.org
Particle-in-cell simulations are used to study how neutral pressure influences plasma
properties at the sheath edge. The high rate of ion–neutral collisions at pressures above …
properties at the sheath edge. The high rate of ion–neutral collisions at pressures above …
Direct measurement of ion and electron flux ratio at their respective sheath-edges and absence of the electron Bohm criterion effects
C Jin, CS Yip, W Zhang, D Jiang… - Plasma Sources Science …, 2022 - iopscience.iop.org
A recent theory suggests that electrons enter electron sheaths at an electron Bohm velocity
given by (T e/me) 1/2 instead of the electron thermal velocity as conventionally assumed. To …
given by (T e/me) 1/2 instead of the electron thermal velocity as conventionally assumed. To …
Investigation of ion collision effect on electrostatic sheath formation in weakly ionized and weakly collisional plasma
H Lee, NK Kim, MG Lee, JW Kwon… - Plasma Sources …, 2022 - iopscience.iop.org
The effects of ion collisions on plasma–sheath formation are investigated experimentally for
a low-density and low-pressure discharge. The space potential and ion velocity distribution …
a low-density and low-pressure discharge. The space potential and ion velocity distribution …