Effect of frequency on local thermodynamic equilibrium conditions in an inductively coupled argon plasma at atmospheric pressure

1990 ◽  
Vol 68 (6) ◽  
pp. 2643-2648 ◽  
Author(s):  
Javad Mostaghimi ◽  
Maher I. Boulos
Keyword(s):  
Thermodynamic Equilibrium ◽  
Atmospheric Pressure ◽  
Local Thermodynamic Equilibrium ◽  
Argon Plasma ◽  
Equilibrium Conditions ◽  
Inductively Coupled

LTE Conditions within the Central Channel of the Plasma

1989 ◽  
Vol 43 (8) ◽  
pp. 1385-1387 ◽  
Author(s):  
Thomas R. Smith ◽  
M. Bonner Denton
Keyword(s):  
Thermodynamic Equilibrium ◽  
Atmospheric Pressure ◽  
Inductively Coupled Plasma ◽  
Local Thermodynamic Equilibrium ◽  
Magnesium Ion ◽  
Central Channel ◽  
Electron Densities ◽  
Inductively Coupled ◽  
Excitation Conditions

Studies were performed on the effect of torch pressure on the excitation conditions within an inductively coupled plasma (ICP). Experimentally measured magnesium ion-to-atom ratios and electron densities were used to determine the deviation of the plasma from local thermodynamic equilibrium (LTE) conditions. Results of these studies indicate that the plasma is in an infrathermal state when operated at atmospheric pressure, and excitation conditions within the central channel of an ICP shift towards LTE conditions as torch pressure is increased.

scholarly journals RAPCAL code: A flexible package to compute radiative properties for optically thin and thick low and high-Z plasmas in a wide range of density and temperature

2008 ◽  
Vol 26 (3) ◽  
pp. 433-448 ◽  
Author(s):  
R. Rodríguez ◽  
R. Florido ◽  
J.M. Gil ◽  
J.G. Rubiano ◽  
P. Martel ◽  
...  
Keyword(s):  
Thermodynamic Equilibrium ◽  
Local Thermodynamic Equilibrium ◽  
Radiative Properties ◽  
Inertial Fusion ◽  
Equilibrium Conditions ◽  
Current Topic ◽  
Wide Range ◽  
Non Local ◽  
Detailed Level ◽  
A Current

AbstractRadiative properties are fundamental for plasma diagnostics and hydro-simulations. For this reason, there is a high interest in their determination and they are a current topic of investigation both in astrophysics and inertial fusion confinement research. In this work a flexible computation package for calculating radiative properties for low and high Z optically thin and thick plasmas, both under local thermodynamic equilibrium and non-local thermodynamic equilibrium conditions, named RAPCAL is presented. This code has been developed with the aim of providing accurate radiative properties for low and medium Z plasmas within the context of detailed level accounting approach and for heavy elements under the detailed configuration accounting approach. In order to show the capabilities of the code, there are presented calculations of some radiative properties for carbon, aluminum, krypton and xenon plasmas under local thermodynamic and non-local thermodynamic equilibrium conditions.

Transient conditions in inductively heated plasmas: thermodynamic equilibrium and temperature measurements

1982 ◽  
Vol 60 (6) ◽  
pp. 886-892 ◽  
Author(s):  
Paul Meubus
Keyword(s):  
Thermodynamic Equilibrium ◽  
Decay Time ◽  
Concentration Distribution ◽  
Local Thermodynamic Equilibrium ◽  
Energy Levels ◽  
Argon Plasma ◽  
Partition Functions ◽  
Transient Conditions ◽  
Gas Interactions ◽  
Catalytic Effects

A study has been made on transient extinction conditions in an inductively heated argon plasma. It was observed that local thermodynamic equilibrium (LTE) conditions do exist between the metastable 3P2 level and upper energy levels, so that during the decay time it is possible to determine a meaningful temperature, using the 3P2 level as a fundamental level and the partition functions being calculated accordingly. Together with the temperature determination, a concentration distribution of argon metastables was obtained.Studies of this type are useful for the investigation of quenching processes in plasmas, affecting favorably chemical reactions or solid–gas interactions, thus leading to enhanced catalytic effects or modifications of solid particle structures which are liable to generate new electrical, thermal, etc. properties of interest.

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