A Novel ICP Torch with Conical Geometry

This paper focuses on the power dissipation of a plasma torch used for an optical surface fabrication process. The process utilizes an inductively coupled plasma (ICP) torch that is equipped with a De-Laval nozzle for the delivery of a highly collimated plasma jet. The plasma torch makes use of a self-igniting coil and an intermediate co-axial tube made of alumina. The torch has a distinctive thermal and electrical response compared to regular ICP torches. In this study, the results of the power dissipation investigation reveal the true efficiency of the torch and discern its electrical response. By systematically measuring the coolant parameters (temperature change and flow rate), the power dissipation is extrapolated. The radio frequency power supply is set to 800 W, E mode, throughout the research presented in this study. The analytical results of power dissipation, derived from the experiments, show that 15.4% and 33.3% are dissipated by the nozzle and coil coolant channels, respectively. The experiments also enable the determination of the thermal time constant of the plasma torch for the entire range of RF power.

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Nonlinear compressible magnetohydrodynamic flows modeling of a process ICP torch

The European Physical Journal Applied Physics ◽

10.1051/epjap/2012110186 ◽

2012 ◽

Vol 58 (1) ◽

pp. 10804 ◽

Cited By ~ 2

Author(s):

N. Ikhlef ◽

T. Hacib ◽

O. Leroy ◽

M.R. Mékiddèche

Keyword(s):

Magnetohydrodynamic Flows ◽

Icp Torch

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Determination of Nitrogen, Phosphorus, and Potassium in Water-Soluble Fertilizers by Inductively Coupled Plasma Emission Spectrometry

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/70.2.760 ◽

1987 ◽

Vol 70 (4) ◽

pp. 760-761

Author(s):

Danton D. Nygaard ◽

John J. Sotera

Keyword(s):

Inductively Coupled Plasma ◽

Water Soluble ◽

Emission Spectrometry ◽

Inductively Coupled ◽

Extension Tube ◽

Plasma Emission Spectrometry ◽

Phosphorus And Potassium ◽

Icp Torch ◽

Nitrogen Phosphorus

Abstract A modification of an inductively coupled plasma (ICP) emission spectrometer is described that enables the simultaneous determination of nitrogen, phosphorus, and potassium in water-soluble fertilizers. A quartz extension tube is added to the ICP torch to exclude air from the plasma, thus allowing accurate nitrogen determination without adversely affecting sensitivity for other analytes. The modification also requires an 18 mg/L argon coolant flow to protect the tube from the heat of the plasma. Detection limits are 20 mg/L for nitrogen and 50 μg/L for phosphorus and potassium. Three NBS reference salts and 2 commercially available fertilizers were analyzed by the method, and results are in excellent agreement with known values.

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

Processes ◽

10.3390/pr7030133 ◽

2019 ◽

Vol 7 (3) ◽

pp. 133 ◽

Cited By ~ 1

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.

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Flexible TPS Surface Catalysis Testing in a 30 kW ICP Torch Facility

43rd AIAA Thermophysics Conference ◽

10.2514/6.2012-3095 ◽

2012 ◽

Cited By ~ 2

Author(s):

Walten Owens ◽

Jason Meyers ◽

Douglas Fletcher ◽

Joseph Del Corso ◽

Anthony Calomino

Keyword(s):

Surface Catalysis ◽

Icp Torch

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Analysis of Aluminum by Inductively Coupled Plasma-Atomic Emission Spectroscopy

Applied Spectroscopy ◽

10.1366/0003702834634343 ◽

1983 ◽

Vol 37 (4) ◽

pp. 389-395 ◽

Cited By ~ 14

Author(s):

Ramon M. Barnes ◽

Lancelot Fernando ◽

Lu Shang Jing ◽

Himansu S. Mahanti

Keyword(s):

Inductively Coupled Plasma ◽

Emission Spectroscopy ◽

Atomic Emission ◽

Atomic Emission Spectroscopy ◽

Spectral Lines ◽

Plasma Atomic Emission ◽

Figures Of Merit ◽

Inductively Coupled ◽

Icp Torch

Inductively coupled plasma-atomic emission spectroscopy (ICP-AES) is applied in the determination of 21 elements in primary, refined, and alloy aluminum. Rapid and reliable sample preparation procedures are developed. Spectral lines are selected after examination of experimental wavelength scans at each analyte wavelength. The limits of detection, background equivalent concentration, and analytical figures of merit are determined. For high silicon-containing aluminum, HF solutions were analyzed by employing an inert nebulizer utilizing polytetrafluoroethylene (PTFE) capillary tubes, a PTFE spray chamber, and an ICP torch with a graphite injector tube.

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