scholarly journals Use of Computer Experiments to Study the Current Collected by Cylindrical Langmuir Probes

2016 ◽  
Vol 3 (3) ◽  
pp. 105-109
Author(s):  
A. Tejero-del-Caz ◽  
J. M. Díaz-Cabrera ◽  
J. I. Fernández Palop ◽  
J. Ballesteros
Keyword(s):  
Electron Temperature ◽  
Langmuir Probe ◽  
Computer Experiments ◽  
Temperature Ratio ◽  
Langmuir Probes ◽  
Particle In Cell ◽  
Probe Radius ◽  
Cell Simulation ◽  
Cylindrical Langmuir Probe

A particle-in-cell simulation has been developed to study the behaviour of ions in the surroundings of a negatively biased cylindrical Langmuir probe. Here, we report our findings on the transition between radial and orbital behaviour observed by means of the aforementioned code. The influence of the ion to electron temperature ratio on the transition for different dimensionless probe radius is discussed. Two different behaviours have been found for small and large probe radii.

Particle-in-cell/Monte Carlo simulation of electron and ion currents to cylindrical Langmuir probe

2018 ◽  
Vol 59 (3) ◽  
pp. 314-325 ◽  
Author(s):  
Petr Zikán ◽  
Kristián Farkaš ◽  
David Trunec ◽  
Jaroslav Jánský ◽  
Zdeněk Bonaventura
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Langmuir Probe ◽  
Ion Currents ◽  
Particle In Cell ◽  
Cylindrical Langmuir Probe

scholarly journals Spatial Temperature Profile in a Magnetised Capacitively Coupled Discharge

2018 ◽  
Vol 16 (6) ◽  
pp. 385-390
Author(s):  
Shikha BINWAL ◽  
Jay K JOSHI ◽  
Shantanu Kumar KARKARI ◽  
Predhiman Krishan KAW ◽  
Lekha NAIR ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Temperature ◽  
Temperature Profile ◽  
Transverse Magnetic ◽  
Capacitively Coupled ◽  
Particle In Cell ◽  
Cell Simulation ◽  
Higher Temperature ◽  
The Magnetic Field ◽  
Emissive Probe

A floating emissive probe has been used to obtain the spatial electron temperature (Te) profile in a 13.56 MHz parallel plate capacitive coupled plasma. The effect of an external transverse magnetic field and pressure on the electron temperature profile has been discussed. In the un-magnetised case, the bulk region of the plasma has a uniform Te. Upon application of the magnetic field, the Te profile becomes non-uniform and skewed.  With increase in pressure, there is an overall reduction in electron temperature. The regions adjacent to the electrodes witnessed a higher temperature than the bulk for both cases. The emissive probe results have also been compared with particle-in-cell simulation results for the un-magnetised case.

scholarly journals Microscopic Effect on Filamentary Coherent Structure Dynamics in Boundary Layer Plasmas

Plasma ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Hiroki Hasegawa ◽  
Seiji Ishiguro
Keyword(s):  
Boundary Layer ◽  
Symmetry Breaking ◽  
Electron Temperature ◽  
Coherent Structure ◽  
Three Dimensional ◽  
Temperature Ratio ◽  
Pic Simulation ◽  
Particle In Cell ◽  
Plasma Filament ◽  
Potential Structure

This study has demonstrated kinetic behaviors on the plasma filament propagation with the three-dimensional (3D) Particle-in-Cell (PIC) simulation. When the ion-to-electron temperature ratio T i / T e is higher, the poloidal symmetry breaking in the filament propagation occurs. The poloidal symmetry breaking is thought to be induced by the unbalanced potential structure that arises from the effect of the gyro motion of plasma particles.

scholarly journals Accelerated steady-state electrostatic particle-in-cell simulation of Langmuir probes

2022 ◽  
Vol 29 (1) ◽  
pp. 013502
Author(s):  
Gregory R. Werner ◽  
Scott Robertson ◽  
Thomas G. Jenkins ◽  
Andrew M. Chap ◽  
John R. Cary
Keyword(s):  
Steady State ◽  
Langmuir Probes ◽  
Particle In Cell ◽  
Cell Simulation

Langmuir Probes in Plasma with Anisotropic Velocity Distributions

1972 ◽  
Vol 50 (4) ◽  
pp. 410-413
Author(s):  
H. Tokutaka ◽  
D. G. Frood
Keyword(s):  
Distribution Function ◽  
Electron Temperature ◽  
Flat Plate ◽  
Langmuir Probe ◽  
Langmuir Probes ◽  
Simple Manner ◽  
Velocity Anisotropy ◽  
Modulation Technique ◽  
Principal Axes

The electron temperature measured by a flat-plate Langmuir probe in a plasma with an elliptically anisotropic distribution function is shown to be related in a simple manner to the electron temperatures on the principal axes of the distribution function and to the orientation of the plate with respect to these axes. Velocity anisotropy would be most readily measured using the AC modulation technique in conjunction with a rotatable probe.

Particle-In-Cell Simulation for Breakdown Phenomena in Vacuum

2020 ◽  
Vol 140 (6) ◽  
pp. 318-324
Author(s):  
Haruki Ejiri ◽  
Takashi Fujii ◽  
Akiko Kumada ◽  
Kunihiko Hidaka
Keyword(s):  
Particle In Cell ◽  
Cell Simulation

EXPERIMENTAL INVESTIGATION OF LANGMUIR PROBES

1967 ◽  
Vol 45 (10) ◽  
pp. 3199-3209 ◽  
Author(s):  
R. M. Clements ◽  
H. M. Skarsgard
Keyword(s):  
Magnetic Field ◽  
Microwave Radiometer ◽  
Resonant Cavity ◽  
Boltzmann Distribution ◽  
Probable Error ◽  
Langmuir Probes ◽  
Noticeable Effect ◽  
Probe Field ◽  
Probe Radius ◽  
Weakly Ionized

Electron temperatures and densities measured in a weakly ionized helium afterglow with cylindrical double probes are compared with measurements obtained using a gated microwave radiometer and a microwave resonant cavity. The pressure was varied from 0.1 to 8.5 Torr. At low pressure, magnetic fields up to 0.11 T were applied. Independent of the values of the electron Larmor radii or particle mean free paths relative to the probe radius, the probes correctly measured the electron temperatures within an estimated random probable error of ±4% and a systematic error not exceeding ±4%. This demonstrates the validity, for the range of conditions studied, of a fundamental assumption of probe theory—that electrons in a retarding probe field are in a Maxwell–Boltzmann distribution at a temperature unaffected by the presence of the probe. Towards higher pressure the measurements show an increasing depression of the plasma density near the probe, associated with the diffusion to it. The applied magnetic field had no noticeable effect on the densities measured with the probes as compared with the cavity measurements.

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