Observation of a localised oscillatory mode of optical emission from an air plasma

1980 ◽  
Vol 13 (6) ◽  
pp. 1079-1082 ◽  
Author(s):  
P C Rice-Evans ◽  
I J Franco
Keyword(s):  
Optical Emission ◽  
Oscillatory Mode ◽  
Air Plasma

Peculiarities of optical emission spectroscopy of Copper–Chromium‐air plasma

2021 ◽  
Author(s):  
Aleksandr Murmantsev ◽  
Anatoly Veklich ◽  
Michael Kleshych ◽  
Sergiy Fesenko ◽  
Viacheslav Boretskij
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Air Plasma ◽  
Copper Chromium

scholarly journals Plasma properties of a laser-ablated aluminum target in air

2003 ◽  
Vol 21 (1) ◽  
pp. 97-101 ◽  
Author(s):  
MINJU YING ◽  
YUEYUAN XIA ◽  
YUMING SUN ◽  
MINGWEN ZHAO ◽  
YUCHEN MA ◽  
...  
Keyword(s):  
Emission Spectra ◽  
Optical Emission ◽  
Target Surface ◽  
Emission Lines ◽  
Laser Irradiance ◽  
Air Plasma ◽  
Plasma Properties ◽  
Spatially Resolved ◽  
Avalanche Process ◽  
Optical Emission Spectra

The optical emission spectra of the plasma generated by a 1.06-μm Nd:YAG laser irradiation of Al target in air was recorded and analyzed in a spatially resolved manner. Electron temperatures and densities in the plasma were obtained using the relative emission intensities and the Stark-broadened linewidths of Al(I) emission lines, respectively. The dependence of the electron density and temperature on the distance from the target surface and on the laser irradiance were manifested. We also discussed how the air takes part in the plasma evolution process and confirmed that the ignition of the air plasma was by the collisions between the energetic electrons and the nitrogen atoms through a cascade avalanche process.

Optimally enhanced optical emission in laser-induced air plasma by femtosecond double-pulse

2013 ◽  
Vol 20 (10) ◽  
pp. 103110 ◽  
Author(s):  
Anmin Chen ◽  
Suyu Li ◽  
Shuchang Li ◽  
Yuanfei Jiang ◽  
Junfeng Shao ◽  
...  
Keyword(s):  
Optical Emission ◽  
Double Pulse ◽  
Air Plasma

scholarly journals Time-resolved optical emission spectroscopy of laser-produced air plasma

2010 ◽  
Vol 107 (8) ◽  
pp. 083306 ◽  
Author(s):  
J. J. Camacho ◽  
L. Díaz ◽  
M. Santos ◽  
L. J. Juan ◽  
J. M. L. Poyato
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Air Plasma ◽  
Time Resolved

Laser Ablation of Ti-Al Alloy in Vacuum and Air Environments

2012 ◽  
Vol 217-219 ◽  
pp. 2257-2264 ◽  
Author(s):  
Yue Hua Liu ◽  
Xiang Dong Liu ◽  
Ming Chen ◽  
Ming Wen Zhao
Keyword(s):  
High Power ◽  
Laser Energy ◽  
Optical Emission ◽  
Target Surface ◽  
Al Alloy ◽  
Laser Irradiance ◽  
Air Plasma ◽  
High Power Laser ◽  
Power Laser ◽  
Plasma Parameters

The time-resolved optical emission spectroscopy of Ti-Al alloy plasma produced by the Nd:YAG high-power laser pulses with wavelength of 1064nm was investigated both in air and vacuum conditions. The comparative studies gave detailed insights that the plasmas produced in air were much hotter and denser. The quantitative descriptions indeed suggested that a cascade avalanche process would be happen followed by air plasma firstly, before the laser impacting the target surface. On the other hand, the laser energy may be considerably attenuated via hotter and denser plasma, the amount of laser energy on the target surface remarkably decreased in air condition. In addition, at high-power laser irradiance levels, there was an auto regulatory area near the target surface and the plasma parameters tend to be saturated

Investigation of a Free-Stream Air Plasma Flow by Optical Emission Spectroscopy and Comparison to Magnetohydrodynamics Simulations

2020 ◽  
Author(s):  
Andrea Fagnani ◽  
Damien Le Quang Huy ◽  
Bernd Helber ◽  
Simon Demange ◽  
Alessandro Turchi ◽  
...  
Keyword(s):  
Plasma Flow ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Free Stream ◽  
Optical Emission ◽  
Air Plasma

Tomographic optical emission spectroscopy of a high enthalpy air plasma flow

2016 ◽  
Vol 55 (36) ◽  
pp. 10290 ◽  
Author(s):  
Tobias Hermann ◽  
Stefan Löhle ◽  
Stefanos Fasoulas ◽  
Andreas Andrianatos
Keyword(s):  
Plasma Flow ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Air Plasma ◽  
High Enthalpy
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