Temperature Determination in an Inductively Coupled rf Plasma

1976 ◽  
Vol 30 (1) ◽  
pp. 34-38 ◽  
Author(s):  
K. Visser ◽  
F. M. Hamm ◽  
P. B. Zeeman
Keyword(s):  
Atmospheric Pressure ◽  
Thermal Equilibrium ◽  
Hydrogen Plasma ◽  
Spectral Lines ◽  
Rf Plasma ◽  
Temperature Profiles ◽  
Inductively Coupled ◽  
Temperature Method ◽  
The Difference ◽  
Line Temperature

Simultaneous relative radiances of the Hβ, Hγ, and Hδ spectral lines of hydrogen were measured sequentially at various lateral positions in an inductively coupled rf argon-hydrogen plasma operated at atmospheric pressure (12 kW, 9 MHz). Measurements to take self-absorption into account were also performed. By applying an Abel integral inversion, a radial radiance profile for each line was obtained. With the two-line temperature method, simultaneous temperature profiles were obtained from each of the three line-pairs. The difference between these three sets of values and the negative values obtained for the Hγ, Hδ pair indicates that thermal equilibrium does not exist in this plasma.

Intensities of Hβ and Hγ in Hydrogen Plasma Spectrum with High RF Power Levels at ICP

2013 ◽  
Vol 774-776 ◽  
pp. 471-478
Author(s):  
Song Bai Wang ◽  
Guang Jiu Lei ◽  
Ming Li ◽  
Li Ming Yu ◽  
Ying Nan Bu ◽  
...  
Keyword(s):  
Stark Effect ◽  
Hydrogen Plasma ◽  
Input Power ◽  
Ion Source ◽  
Spectral Lines ◽  
Rf Plasma ◽  
Rf Power ◽  
Balmer Series ◽  
Rf Ion Source ◽  
Plasma Spectrum

In high-power RF ion source, three different regions of the Hβand Hγintensities in the Balmer series of spectral lines for atomic hydrogen plasma were investigated. Three different regions of the Hβand Hγintensities were detected by the increase of input power (0-6 kW) at ICP. In hydrogen plasma spectrum, the Hβand Hγintensities showed three processes: slowly increase, quickly increase and stable saturation. The Stark effect in strong electrical field plays a crucial role in dominating the Balmer Hβand Hγemissions from high-density RF plasma.

Y1Ba2Cu3O7‐x Films from Nitrate Solution using Rf Plasma Deposition

1989 ◽  
Vol 169 ◽  
Author(s):  
A. Shah ◽  
T. Haugan ◽  
S. Witanachchi ◽  
S. Patel ◽  
D. T. Shaw
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Deposition ◽  
Substrate Surface ◽  
Nitrate Solution ◽  
Rf Plasma ◽  
X Ray Diffraction ◽  
Critical Temperatures ◽  
X Ray ◽  
Inductively Coupled ◽  
Current Densities

AbstractA nitrate solution of Y, Ba and Cu was atomized and introduced into an inductively coupled argon ‐ oxygen plasma operated at 4.4 kW and 13.56 MHz under atmospheric pressure. As‐deposited superconducting films were grown on (100) YSZ substrates heated to 650°C. Critical temperatures of 85 K and critical current densities of 7.0 x 104 amp/cm2 at 77 K have been achieved. X‐ray diffraction shows the films to be oriented with the c‐axis perpendicular to the substrate surface. The effects of process parameters, solution composition, and aerosol concentration on the superconducting properties and microstructures will be discussed.

scholarly journals PENENTUAN DENSITAS SPESIES PLASMA HIDROGEN PADA KESETIMBANGAN TERMODINAMIK TEKANAN ATMOSFIR MENGGUNAKAN MATLAB

2019 ◽  
Vol 16 (2) ◽  
pp. 113
Author(s):  
Reeky Fardinata ◽  
Saktioto Saktioto
Keyword(s):  
Atmospheric Pressure ◽  
Thermal Equilibrium ◽  
Hydrogen Plasma ◽  
Rate Of Change ◽  
Equilibrium Density ◽  
Time Interval ◽  
Equilibrium Plasma ◽  
Continuity Equations ◽  
Density Values ◽  
Model Equations

Thermal equilibrium hydrogen plasma at atmospheric pressure were simulated using the software matrix laboratory (MATLAB). Runge Kutta method numerical method as a settlement of differensial model equations of chemical kibetik with the arrhenius equation approach and continuity equations so that the equilibrium density values for each species were obtained.  Equilibrium hydrogen plasma at atmospheric pressure and density rate review every reaction involved.  Parameter of ionizing   and disasosiasi  as a reference equilibrium plasma.  Equilibrium plasma is found in time interval 10-6 – 10-3 s thermal hydrogen plasmas with temperatures of 1 eV.  The density  of hydrogen plasma thermal equilibrium overall are in the interval of 1014 m-3 - 1020 m-3 . The reaction rate of each species varies based on the type of collision and rate of change of species.

scholarly journals Merits of microwave plasmas for optical emission spectrometry – characterization of an axially viewed microwave-sustained, inductively coupled, atmospheric-pressure plasma (MICAP)

2020 ◽  
Vol 35 (10) ◽  
pp. 2369-2377
Author(s):  
Helmar Wiltsche ◽  
Matthias Wolfgang
Keyword(s):  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Optical Emission ◽  
Plasma Source ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Microwave Plasmas ◽  
Inductively Coupled

The MICAP is a microwave driven plasma source employing nitrogen as the plasma gas. In this work we compare LODs and LOQs obtained in axial viewing with those obtained by ICP-OES and evaluate the effect of air instead of nitrogen as the plasma gas.

scholarly journals Elemental composition and clustering behaviour of α-pinene oxidation products for different oxidation conditions

2015 ◽  
Vol 15 (8) ◽  
pp. 4145-4159 ◽  
Author(s):  
A. P. Praplan ◽  
S. Schobesberger ◽  
F. Bianchi ◽  
M. P. Rissanen ◽  
M. Ehn ◽  
...  
Keyword(s):  
Elemental Composition ◽  
Organic Compounds ◽  
Atmospheric Pressure ◽  
Molar Mass ◽  
Oxidation Products ◽  
Neutral Species ◽  
Mass Spectrometers ◽  
Comprehensive Picture ◽  
The Difference ◽  
Chemical Ionisation

Abstract. This study presents the difference between oxidised organic compounds formed by α-pinene oxidation under various conditions in the CLOUD environmental chamber: (1) pure ozonolysis (in the presence of hydrogen as hydroxyl radical (OH) scavenger) and (2) OH oxidation (initiated by nitrous acid (HONO) photolysis by ultraviolet light) in the absence of ozone. We discuss results from three Atmospheric Pressure interface Time-of-Flight (APi-TOF) mass spectrometers measuring simultaneously the composition of naturally charged as well as neutral species (via chemical ionisation with nitrate). Natural chemical ionisation takes place in the CLOUD chamber and organic oxidised compounds form clusters with nitrate, bisulfate, bisulfate/sulfuric acid clusters, ammonium, and dimethylaminium, or get protonated. The results from this study show that this process is selective for various oxidised organic compounds with low molar mass and ions, so that in order to obtain a comprehensive picture of the elemental composition of oxidation products and their clustering behaviour, several instruments must be used. We compare oxidation products containing 10 and 20 carbon atoms and show that highly oxidised organic compounds are formed in the early stages of the oxidation.

Preliminary survey of matrix effects in the Microwave-sustained, Inductively Coupled Atmospheric-pressure Plasma (MICAP)

Talanta ◽  
2018 ◽  
Vol 180 ◽  
pp. 25-31 ◽  
Author(s):  
Klemens M. Thaler ◽  
Andrew J. Schwartz ◽  
Christoph Haisch ◽  
Reinhard Niessner ◽  
Gary M. Hieftje
Keyword(s):  
Atmospheric Pressure ◽  
Matrix Effects ◽  
Atmospheric Pressure Plasma ◽  
Preliminary Survey ◽  
Inductively Coupled ◽  
Pressure Plasma

Determination of Al, Cu, Ni in Zr-Based Amorphous Alloy by Inductively Coupled Plasma Atomic Emission Spectrometry

2015 ◽  
Vol 1095 ◽  
pp. 218-221
Author(s):  
Lan Ma ◽  
Guang He Qin ◽  
Qiong Yu ◽  
Jing Zhou
Keyword(s):  
Amorphous Alloy ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Spectral Lines ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled

A Method was studied for the determination of Al、Cu、Ni in Zr-based amorphous alloy by inductively coupled plasma atomic emission spectrometry (ICP-AES). Samples were dissolved by hydrochloric acid,nitric acid and hydrofluoric acid,analytical spectral lines for aluminum,copper,nickle are 308.215nm,327.396nm and 231.604nm.Interference of zinc was eliminated by the matrix-matching method, the experiments were done with optimized Operating Parameters. The correlation coefficients of the calibration curve are all 0.999,detection limits are 0.0010%,0.005% and 0.0006% respectively,and the range of recovery is 98%-104%.

A two‐temperature model of the inductively coupled rf plasma

1987 ◽  
Vol 61 (5) ◽  
pp. 1753-1760 ◽  
Author(s):  
Javad Mostaghimi ◽  
Pierre Proulx ◽  
Maher I. Boulos
Keyword(s):  
Rf Plasma ◽  
Temperature Model ◽  
Inductively Coupled ◽  
Two Temperature
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