scholarly journals Investigation of an Ablation-dominated Arc in a Model Chamber by Optical Emission Spectroscopy

2017 ◽  
Vol 4 (2) ◽  
pp. 153-156 ◽  
Author(s):  
R. Methling ◽  
A. Khakpour ◽  
S. Wetzeler ◽  
D. Uhrlandt
Keyword(s):  
Emission Spectroscopy ◽  
High Speed ◽  
Optical Emission Spectroscopy ◽  
Rotational Symmetry ◽  
Line Emission ◽  
Optical Emission ◽  
Ambient Air ◽  
Video Camera ◽  
Radial Temperature ◽  
Model Chamber

A switching arc in a model chamber is investigated by means of optical emission spectroscopy. Ignition wire is applied to initiate an arc of several kiloampere between tungsten−copper electrodes. Radiation emitted by the arc plasma is absorbed by a surrounding PTFE nozzle, leading to an ablation–dominated discharge. Video spectroscopy is carried out using an imaging spectrometer combined with a high–speed video camera. Carbon ion and fluorine atom line emission from the heating channel as well as copper, oxygen and nitrogen from ignition wire and ambient air are analyzed with focus on the low–current phases at the beginning of discharge and near current zero. Additionally, electrical parameters and total pressure are recorded while the general behavior of the discharge is observed by another video camera. Considering rotational symmetry of the arc the corresponding radial emission coefficients are determined. Finally, radial temperature profiles are calculated.

scholarly journals Characterization of a nitrogen gliding arc plasmatron using optical emission spectroscopy and high-speed camera

2018 ◽  
Vol 52 (6) ◽  
pp. 065201 ◽  
Author(s):  
Sven Gröger ◽  
Marleen Ramakers ◽  
Marc Hamme ◽  
Jose A Medrano ◽  
Nikita Bibinov ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
High Speed ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
High Speed Camera ◽  
Gliding Arc

scholarly journals Optical emission spectroscopy study on flashover along insulator surface due to particle contamination

2014 ◽  
Vol 32 (4) ◽  
pp. 681-689 ◽  
Author(s):  
Somesh Vinayak Tewari ◽  
R.J. Kshirsagar ◽  
Amitava Roy ◽  
R. Sarathi ◽  
Archana Sharma ◽  
...  
Keyword(s):  
Electron Density ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Spectral Characteristics ◽  
Plasma Temperature ◽  
Optical Emission ◽  
Ambient Air ◽  
Surface Flashover ◽  
Particle Contamination ◽  
Peak Value

AbstractThe surface flashover behavior in ambient air and nitrogen are studied at a pressure of 1 kg/cm2 using optical emission spectroscopy. A high dc voltage is applied to Rogowski profile electrodes with polyoxymethylene as the insulator between the electrodes. Three different conditions of needle protrusion along the surface of polyoxymethylene are used to study the variation in spectral characteristics due to particle contamination. When the insulator is placed between the spark gap electrodes, the OES spectra are dominated by the Hα line in air and nitrogen medium. It was found that the intensity of N2+ (B-X) emission is less in air surrounding the insulator medium. The plasma temperature during bulk breakdown in air is 0.433 eV, which increases to 0.434 eV with the pressurized nitrogen, which further increases in the presence of insulator to 0.441 eV and 0.44 eV in nitrogen and air, respectively. The electron density is obtained from the N emission line at 746.8 nm and the estimated peak value is 2.85 × 1012 cm−3 in the presence of insulator. The plasma temperature decreases with increase in distance of particle contamination from cathode. The increase in electron density in air, as compared to nitrogen implies more material desorption in air which is also supported by the comparisons of Hα lines.

Inductively coupled plasma optical emission spectroscopy as a tool for evaluating lateral flow assays

2021 ◽  
Author(s):  
Jenna M. DeSousa ◽  
Micaella Z. Jorge ◽  
Hayley B. Lindsay ◽  
Frederick R. Haselton ◽  
David W. Wright ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Lateral Flow ◽  
Gold Content ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Lateral Flow Assays ◽  
Plasma Optical Emission Spectroscopy

This work demonstrates the first use of ICP-OES to quantitatively analyze gold content on lateral flow assays.

Seasoning Optimization by Using Optical Emission Spectroscopy

2020 ◽  
Author(s):  
Masahiro Shiga ◽  
Haruki Omine ◽  
Masaki Kitsunezuka ◽  
Hironori Moki ◽  
Yuki Kataoka ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission
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