Comparative measurement of electron density and temperature profiles in low-temperature ECR discharges by a lithium atom beam and Thomson scattering

2000 ◽  
Vol 33 (4) ◽  
pp. 360-366 ◽  
Author(s):  
A Beck ◽  
D Hemmers ◽  
H Kempkens ◽  
H B Schweer ◽  
J Uhlenbusch
Keyword(s):  
Low Temperature ◽  
Electron Density ◽  
Lithium Atom ◽  
Thomson Scattering ◽  
Temperature Profiles ◽  
Atom Beam ◽  
Comparative Measurement ◽  
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.

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

scholarly journals Modelling coronal electron density and temperature profiles based on solar magnetic field observations

2016 ◽  
Vol 12 (S328) ◽  
pp. 159-161
Author(s):  
J. M. Rodríguez Gómez ◽  
L. E. Antunes Vieira ◽  
A. Dal Lago ◽  
J. Palacios ◽  
L. A. Balmaceda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Corona ◽  
Electron Density ◽  
Transport Model ◽  
Source Surface ◽  
Temperature Profiles ◽  
Emission Model ◽  
Flux Transport ◽  
Field Source ◽  
Electron Density And Temperature

AbstractThe density and temperature profiles in the solar corona are complex to describe, the observational diagnostics is not easy. Here we present a physics-based model to reconstruct the evolution of the electron density and temperature in the solar corona based on the configuration of the magnetic field imprinted on the solar surface. The structure of the coronal magnetic field is estimated from Potential Field Source Surface (PFSS) based on magnetic field from both observational synoptic charts and a magnetic flux transport model. We use an emission model based on the ionization equilibrium and coronal abundances from CHIANTI atomic database 8.0. The preliminary results are discussed in details.

scholarly journals Measurement of Electron Density and Temperature Using Laser Thomson Scattering in PANTA

2017 ◽  
Vol 12 (0) ◽  
pp. 1401018-1401018 ◽  
Author(s):  
Kentaro TOMITA ◽  
Yuta SATO ◽  
Nima BOLOUKI ◽  
Tatsuro SHIRAISHI ◽  
Kiichiro UCHINO ◽  
...  
Keyword(s):  
Electron Density ◽  
Thomson Scattering ◽  
Electron Density And Temperature
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