scholarly journals Cavity-enhanced Thomson scattering measurements of electron density and temperature in a hollow cathode discharge

2018 ◽  
Vol 43 (21) ◽  
pp. 5343 ◽  
Author(s):  
Adam J. Friss ◽  
Azer P. Yalin
Keyword(s):  
Electron Density ◽  
Hollow Cathode ◽  
Thomson Scattering ◽  
Hollow Cathode Discharge ◽  
Scattering Measurements ◽  
Electron Density And Temperature

scholarly journals Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Elmar Slikboer ◽  
James Walsh
Keyword(s):  
Electron Density ◽  
Applied Voltage ◽  
Voltage Pulse ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Thomson Scattering ◽  
Electron Dynamics ◽  
Electron Density And Temperature ◽  
Argon Plasma Jet ◽  
Applied Voltage Pulse

AbstractThe interaction between an argon plasma jet excited using microsecond duration voltage pulses and a liquid target was examined using Thomson scattering to quantify the temporal evolution of the electron density and temperature. The electrical resistance between a liquid target and the electrical ground was varied from 1 to $$680\, \text {k}\Omega $$ 680 k Ω to mimic different conductivity liquids while the influence of the varying electrical properties on the electron dynamics within the plasma were examined. It was demonstrated that the interaction between the plasma jet and a liquid target grounded via a high resistance resulted in typical dielectric barrier discharge behaviour, with two discharge events per applied voltage pulse. Under such conditions, the electron density and temperature reached a peak of $$1\cdot 10^{15}\, \text {cm}^{-3}$$ 1 · 10 15 cm - 3 and 3.4 eV, respectively; with both rapidly decaying over several hundreds of nanoseconds. For liquid targets grounded via a low resistance, the jet behaviour transitioned to a DC-like discharge, with a single breakdown event being observed and sustained throughout the duration of each applied voltage pulse. Under such conditions, electron densities of $$2{-}3 \cdot 10^{15}\, \text {cm}^{-3}$$ 2 - 3 · 10 15 cm - 3 were detected for several microseconds. The results demonstrate that the electron dynamics in a pulsed argon plasma jet are extremely sensitive to the electrical characteristics of the target, which in the case of water, can evolve during exposure to the plasma.

Electron Energy Distribution Function (0 — 40 eV Range) in Helium in a Longitudinal Hollow-Cathode Discharge Used for Lasers

1987 ◽  
Vol 42 (6) ◽  
pp. 587-592
Author(s):  
Jerzy Mizeraczyk
Keyword(s):  
Distribution Function ◽  
Energy Distribution ◽  
Electron Density ◽  
Electron Energy ◽  
Hollow Cathode ◽  
Electron Energy Distribution Function ◽  
Hollow Cathode Discharge ◽  
Energy Distribution Function ◽  
Electron Energy Distribution ◽  
Metal Vapour

This paper presents results of measurements of the electron energy distribution function (EEDF) in the range 0 - 40 eV, and the electron density and the space potential for the helium plasma of a longitudinal discharge in a hollow cathode as used for He-inert gas and He-metal vapour lasers. The results show that the EEDF and also the mean electron energy, the electron density and the plasma potential differ from those typical of the transverse hollow-cathode discharge.

Thomson Scattering Measurement of Electron Density and Temperature of a Microwave Plasma Produced in a Hydrogen Gas at a Moderate Pressure

2000 ◽  
Vol 39 (Part 1, No. 12A) ◽  
pp. 6732-6736 ◽  
Author(s):  
Soushi Narishige ◽  
Seiji Suzuki ◽  
Mark D. Bowden ◽  
Kiichiro Uchino ◽  
Katsunori Muraoka ◽  
...  
Keyword(s):  
Electron Density ◽  
Microwave Plasma ◽  
Thomson Scattering ◽  
Hydrogen Gas ◽  
Moderate Pressure ◽  
Electron Density And Temperature ◽  
Scattering Measurement
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