Mechanistic insights into chloride ion detection from the atmospheric-pressure afterglow of an argon inductively coupled plasma

2018 ◽  
Vol 33 (11) ◽  
pp. 1981-1992 ◽  
Author(s):  
Joseph E. Lesniewski ◽  
William P. McMahon ◽  
Kaveh Jorabchi
Keyword(s):  
Atmospheric Pressure ◽  
Inductively Coupled Plasma ◽  
Chloride Ion ◽  
Ion Detection ◽  
Chlorinated Compounds ◽  
Inductively Coupled ◽  
Ion Formation ◽  
Cluster Ion

Detection of chloride ion from chlorinated compounds is influenced by cluster ion formation in the afterglow of an ICP.

scholarly journals Computational Fluid Dynamics (CFD) Simulations and Experimental Measurements in an Inductively-Coupled Plasma Generator Operating at Atmospheric Pressure: Performance Analysis and Parametric Study

Processes ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 133 ◽  
Author(s):  
Sangeeta Punjabi ◽  
Dilip Barve ◽  
Narendra Joshi ◽  
Asoka Das ◽  
Dushyant Kothari ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Atmospheric Pressure ◽  
Inductively Coupled Plasma ◽  
Gas Flow ◽  
Rf Power ◽  
Gas Flow Rate ◽  
Inductively Coupled ◽  
Plasma Resistance ◽  
Computational Fluid Dynamics Cfd ◽  
Icp Torch

In this article, electrical characteristics of a high-power inductively-coupled plasma (ICP) torch operating at 3 MHz are determined by direct measurement of radio-frequency (RF) current and voltage together with energy balance in the system. The variation of impedance with two parameters, namely the input power and the sheath gas flow rate for a 50 kW ICP is studied. The ICP torch system is operated at near atmospheric pressure with argon as plasma gas. It is observed that the plasma resistance increases with an increase in the RF-power. Further, the torch inductance decreases with an increase in the RF-power. In addition, plasma resistance and torch inductance decrease with an increase in the sheath gas flow rate. The oscillator efficiency of the ICP system ranges from 40% to 80% with the variation of the Direct current (DC) powers. ICP has also been numerically simulated using Computational Fluid Dynamics (CFD) to predict the impedance profile. A good agreement was found between the CFD predictions and the impedance experimental data published in the literature.

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.

High growth rate diamond synthesis in a large area atmospheric pressure inductively coupled plasma

1990 ◽  
Vol 5 (11) ◽  
pp. 2326-2333 ◽  
Author(s):  
M. A. Cappelli ◽  
T. G. Owano ◽  
C. H. Kruger
Keyword(s):  
Growth Rates ◽  
Atmospheric Pressure ◽  
Atomic Hydrogen ◽  
Inductively Coupled Plasma ◽  
High Growth ◽  
High Growth Rate ◽  
Diamond Synthesis ◽  
Large Area ◽  
Inductively Coupled ◽  
Hydrogen Flux

A study of diamond synthesis in an atmospheric pressure inductively coupled argon-hydrogen-methane plasma is presented. The plasma generated has an active area of 20 cm2 and a free stream temperature of approximately 5000 K. Deposition experiments lasting 1 h in duration have been performed in both stagnation flow and flat plate parallel flow geometries. The diamond film deposited in both configurations are nonuniform yet fairly reproducible. The variation in the growth rates at various regions of the substrate is attributed to the variation in the surface atomic hydrogen flux. Growth rates are as high as 50 μm/h, in regions of the substrate where the atomic hydrogen flux is expected to be large. Little or no growth is observed in regions where the atomic hydrogen is expected to recombine within the thermal boundary layer before arriving at the surface. Individual particles are analyzed by micro-Raman spectroscopy. Large (50 μm) size well-faceted particles show little evidence of non-diamond carbon content and are found to be under a state of compression, displaying shifts in the principal phonon mode as great as 3 cm−1.

Atomic Emission Spectra of Xenon, Krypton, and Neon: Spectra from 200 to 900 nm by Sealed Inductively Coupled Plasma/Atomic Emission Spectroscopy

1994 ◽  
Vol 48 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Tracey Jacksier ◽  
Ramon M. Barnes
Keyword(s):  
Spectral Range ◽  
Atmospheric Pressure ◽  
Inductively Coupled Plasma ◽  
Emission Spectroscopy ◽  
Emission Spectra ◽  
Atomic Emission ◽  
Plasma Discharge ◽  
Atomic Emission Spectroscopy ◽  
Plasma Atomic Emission ◽  
Inductively Coupled

The emission spectra of pure xenon, krypton, and neon are reported over the spectral range of 200 to 900 nm from an enclosed inductively coupled plasma discharge operated at atmospheric pressure and 350 W.

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