Electrodeless atmospheric secondary induced ionization jet (EASII-jet): Dynamics and properties of a transferred helium plasma source

A new approach for using Fourier transform spectroscopy (FTS) for the detection of atomic emission from an atmospheric helium plasma has been developed and the results obtained are described. Among the different types of plasma source available, the atmospheric pressure microwave helium plasma appears to be an efficient excitation source for the determination of nonmetal species. The more complete microwave plasma emission spectra of Cl, Br, I, S, O, P, C, N, and He in the near-infrared region were obtained and their corrected relative emission intensities are reported. This makes qualitative identification simple, and aids in the quantitative analysis of atomic species. The accuracy of the emission wavelengths obtained with the Fourier transform spectrophotometer was excellent and the resolution provided by the FTS allowed certain adjacent emission lines to be resolved. These atomic emission lines were found to be adequate for analytical applications.

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Investigation of the Performance of Barrel Atmospheric Plasma Source for the Deposition of Fluorocarbon Coating onto Silicone Polymer Particles

Advances in Materials Science and Engineering ◽

10.33140/amse/01/01/00002 ◽

2017 ◽

Vol 1 (1) ◽

Keyword(s):

Plasma Source ◽

Atmospheric Plasma ◽

Helium Plasma ◽

Ftir Analysis ◽

Polymer Particles ◽

Flow Rates ◽

Chemical Functionality ◽

Barrel Reactor ◽

Silicone Polymer

This study reports on the use of a barrel atmospheric plasma source for the deposition of a fluorocarbon coating onto the silicone polymer particles. The (Perfluoro-1-Decene) precursor was introduced into helium plasma and coatings deposited at flow rates in the range 5 to 9 μl/min. The retention of the chemical functionality of the precursor in the plasma polymerized coating was demonstrated using both XPS and FTIR analysis. This study thus demonstrates the success of the barrel reactor for the coating of polymer particles.

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Measurements of calcium isotopes and isotope ratios: a new method based on helium plasma source “off-cone” sampling time-of-flight mass spectrometry

Journal of Analytical Atomic Spectrometry ◽

10.1039/b102735m ◽

2001 ◽

Vol 16 (7) ◽

pp. 756-761 ◽

Cited By ~ 10

Author(s):

Yixiang Duan ◽

Yongxuan Su ◽

Zhe Jin ◽

Martin Koby ◽

Vahid Majidi

Keyword(s):

Mass Spectrometry ◽

Time Of Flight ◽

Plasma Source ◽

Isotope Ratios ◽

Sampling Time ◽

New Method ◽

Helium Plasma ◽

Calcium Isotopes ◽

Flight Mass Spectrometry

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The Ag I and Au I Resonance Line Broadening in Helium Plasma

Zeitschrift für Naturforschung A ◽

10.1515/zna-2006-0907 ◽

2006 ◽

Vol 61 (9) ◽

pp. 491-498 ◽

Cited By ~ 4

Author(s):

Stevan Djeniže ◽

Aleksandar Srećković ◽

Srdjan Bukvić ◽

Nikola Vitas

Keyword(s):

Hyperfine Structure ◽

Line Shape ◽

Resonance Line ◽

Plasma Source ◽

Spectral Lines ◽

Helium Plasma ◽

Stark Broadening ◽

Line Broadening ◽

Temperature Estimation ◽

And Shifts

The shapes and shifts of the resonance spectral lines of neutral silver (Ag I: 328.068 and 338.289 nm) and gold (Au I: 242.795 and 267.595 nm) have been measured in a laboratory helium plasma of about 18,500 K electron temperature and an electron density ranging between 0.78 · 1023 and 1.24 · 1023 m−3. Stark broadening has been found as the dominant mechanism of the line shape and position formation. Our measured Ag I and Au I resonance line Stark widths (W) and shifts (d) are the first reliable experimental data. They are compared with calculated single Ag I and Au IW and d data based on a semiclassical approach. The measured values are higher than the calculated ones, especially of the Au I resonance lines. Besides, we have calculated the hyperfine structure (hfs) components and their relative intensities of the mentioned Ag I and Au I lines. Strong asymmetry between the red and blue components of the hfs was found. A modified version of the linear, low-pressure, pulsed arc was used as plasma source operated in helium with silver and gold atoms as impurities, evaporated from silver and gold cylindrical plates located in the homogeneous part of the discharge providing conditions free of self-absorption. At the above mentioned helium plasma conditions the splitting in the hyperfine structure (Δhfs) of the Ag I and Au I resonance lines has been overpowered by Stark and Doppler broadenings. We estimate that at electron densities below 1020 m−3 and electron temperatures below 10,000 K the hfs components in the 267.595 nm and 242.795 nm Au I lines play an important role in the line shape formation, and the resulting line profiles can be used for temperature estimation in optically thin plasmas

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