scholarly journals Measurements of electron number density and temperature in a supersonic plasma jet by optical emission spectroscopy

2021 ◽  
Vol 2100 (1) ◽  
pp. 012003
Author(s):  
A S Pashchina
Keyword(s):  
Shock Wave ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Electron Number Density ◽  
Optical Emission ◽  
Plasma Jet ◽  
Number Density ◽  
Electron Number ◽  
Supersonic Plasma ◽  
Supersonic Plasma Jet

Abstract The results of experimental studies of the shock-wave region of the supersonic plasma jet flow formed by a pulsed capillary discharge with a polymeric wall are presented. Using optical emission spectroscopy of high spatial resolution, a detailed picture of the evolution of the radial profiles of the electron number density and temperature along the initial section of an underexpanded plasma jet, starting from the capillary outlet and ending with the flow stagnation zone, has been obtained. It was found that the profiles of the electron number density and temperature reflect all the features of the shock-wave flow region, tracing the influence of intercepting, central and reflected shock waves.

scholarly journals THE INTERACTION OF A SUPERSONIC PLASMA JET CONTAINING NANOPARTICLES WITH A SUBSTRATE

2021 ◽  
pp. 141-144
Author(s):  
O.Yu. Kravchenko ◽  
I.S. Maruschak
Keyword(s):  
Shock Wave ◽  
Computer Simulation ◽  
Hydrodynamic Model ◽  
Plasma Jet ◽  
Plasma Pressure ◽  
Sharp Boundary ◽  
Flat Substrate ◽  
Supersonic Plasma ◽  
Directed Energy ◽  
Supersonic Plasma Jet

In the framework of a multi-fluid axisymmetric hydrodynamic model, the interaction of a supersonic plasma jet containing nanoparticles with a flat substrate is investigated using computer simulation. In particular, the fluxes of nanoparticles on the substrate are studied at plasma inlet pressure P0=1...100 Torr. The results show that a shock wave is formed near the substrate, which affects the energy of nanoparticles and their fluxes on the substrate. The width of the region along the radius, where the flow of nanoparticles onto the substrate is essential, depends on the plasma pressure in the jet. At large values of plasma pressure (P0≥75 Torr) a cloud of nanoparticles with a sharp boundary is formedon the axis of the plasma jet near the substrate. Interacting with this cloud, nanoparticles moving in the plasma jet, lose directed energy and their flow on the substrate near the axis of the jet is zero.

scholarly journals The effect of liquid target on a nonthermal plasma jet—imaging, electric fields, visualization of gas flow and optical emission spectroscopy

2018 ◽  
Vol 51 (6) ◽  
pp. 065202 ◽  
Author(s):  
Vesna V Kovačević ◽  
Goran B Sretenović ◽  
Elmar Slikboer ◽  
Olivier Guaitella ◽  
Ana Sobota ◽  
...  
Keyword(s):  
Electric Fields ◽  
Emission Spectroscopy ◽  
Gas Flow ◽  
Optical Emission Spectroscopy ◽  
Nonthermal Plasma ◽  
Optical Emission ◽  
Plasma Jet

Investigation of Diagnostic Methods of Electron Number Density in Laser Plasma

2013 ◽  
Vol 437 ◽  
pp. 761-764
Author(s):  
Lan Li ◽  
Qian Li ◽  
Yong Li
Keyword(s):  
Laser Plasma ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Spatial Information ◽  
Optical Emission ◽  
Diagnostic Methods ◽  
Number Density ◽  
Basic Principles ◽  
Applicable Range ◽  
Temporal And Spatial

Langmuir probe, interferometry/reflectometry and optical emission spectroscopy, diagnostic methods in common use for plasma, were analyzed. Basic principles, system compositions and applicable range were compared with each other. Optical emission spectroscopy method is easy to obtain temporal and spatial information and has large measuring range, which is more suitable for diagnosis for laser plasma.

Spatially Resolved Optical Emission Spectroscopy of a Helium Plasma Jet and its Effects on Wound Healing Rate in a Diabetic Murine Model

2014 ◽  
Vol 4 (1-4) ◽  
pp. 177-191 ◽  
Author(s):  
Marc C. Jacofsky ◽  
Cheri Lubahn ◽  
Courtney McDonnell ◽  
Yohan Seepersad ◽  
Gregory Fridman ◽  
...  
Keyword(s):  
Wound Healing ◽  
Murine Model ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Healing Rate ◽  
Optical Emission ◽  
Plasma Jet ◽  
Helium Plasma ◽  
Spatially Resolved ◽  
Wound Healing Rate

Optical Emission Spectroscopy of Argon Plasma Jet

2013 ◽  
Vol 770 ◽  
pp. 245-248 ◽  
Author(s):  
Kanchaya Honglertkongsakul
Keyword(s):  
Electron Temperature ◽  
Nozzle Exit ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Argon Plasma ◽  
Optical Emission ◽  
Plasma Jet ◽  
Plasma Expansion ◽  
Plasma Parameters ◽  
Argon Plasma Jet

Argon plasma jet in a single-electrode configuration was generated at low temperature and atmospheric pressure by 50 kHz radiofrequency power supply. Optical Emission Spectroscopy (OES) was used to investigate the local emissivity of argon plasma in the range between 200 and 1,100 nm. The spatial distribution of reactive species was measured at different distances of the plasma expansion from the nozzle exit such as 0.0, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 cm. These measurements were obtained to analyze the plasma parameters such as electron temperature and electron density. The effect of distances of the plasma expansion from the nozzle exit on the plasma parameters was studied. The main intensive argon lines were found in the region between 690 and 970 nm. The electron temperature was found in the range of 0.5-1.1 eV. The electron density was found in the range of 4.0x1012-1.2x1013 cm-3. The plasma parameters strongly depended on the distances of the plasma expansion from the nozzle exit.

Polymerization of Maleic Anhydride Induced by Non-Equilibrium Atmospheric Pressure Argon Plasma

2014 ◽  
Vol 670-671 ◽  
pp. 244-248 ◽  
Author(s):  
Jun Yan ◽  
Katsuhiko Hosoi ◽  
Shin-ichi Kuroda
Keyword(s):  
Maleic Anhydride ◽  
Atmospheric Pressure ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Argon Plasma ◽  
Optical Emission ◽  
Plasma Jet ◽  
Ft Ir ◽  
Deposited Films ◽  
Non Equilibrium

The non-equilibrium atmospheric pressure Ar plasma was applied for the polymerization of maleic anhydride (MA). The deposited films were analyzed by using Fourier transform infrared spectroscopy (FT-IR) proving the monomer was successfully polymerized with retaining the functional groups. The intensity of optical emission spectroscopy (OES) of the plasma jet was found to become weaker when the monomer was introduced into the jet. This was interpreted as the result of the energy transfer from the metastable Ar to the monomer. It was proposed that the excited MA changed into π-π* transition state to produce dimer biradicals which initiate the polymerization.

Electron Number Density in Supersonic Thermal Plasma Jet

2011 ◽  
Vol 39 (11) ◽  
pp. 2840-2841
Author(s):  
Alan Maslani ◽  
Viktor Sember ◽  
Milan Hrabovsky
Keyword(s):  
Thermal Plasma ◽  
Electron Number Density ◽  
Plasma Jet ◽  
Number Density ◽  
Electron Number ◽  
Thermal Plasma Jet
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