scholarly journals Analytical capability of the plasma induced by IR TEA CO2 laser pulses on copper based alloys

2015 ◽  
Vol 80 (12) ◽  
pp. 1505-1513 ◽  
Author(s):  
Milos Momcilovic ◽  
Jovan Ciganovic ◽  
Dragan Rankovic ◽  
Uros Jovanovic ◽  
Milovan Stoiljkovic ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Pulse Length ◽  
Target Surface ◽  
Laser Pulses ◽  
Spectral Lines ◽  
Tea Co2 Laser ◽  
Plasma Spectroscopy ◽  
Plasma Region ◽  
Co2 Laser Radiation ◽  
Good Signal

The applicability of nanosecond infrared (IR) transversely excited atmospheric (TEA) CO2 laser, operating at 10.6 ?m and 100 ns pulse length (initial spike), induced plasma under reduced air pressure for spectrochemical analysis of bronze and brass samples was investigated. The plasma consisted of two clearly distinguished and spatially separated regions and expanded to a distance of about 10 mm from the surface. Elemental composition of the samples was determined using a time-integrated space-resolved laser-induced plasma spectroscopy (TISR-LIPS) technique. Sharp and well resolved spectral lines mostly atomic, and negligibly low background emission, were obtained from a plasma region 7 mm from the target surface. Good signal to background and signal to noise ratios were obtained. Estimated detection limits for trace elements Mg, Fe, Al and Ca were in the order of 10 ppm in bronze and around 50 ppm in brass. Damage on the investigated samples induced by TEA CO2 laser radiation was negligible.

Nano-Second Surface Modification of Titanium Nitride Thin Film by Nd:YAG and TEA CO2 Lasers

2006 ◽  
Vol 518 ◽  
pp. 161-166 ◽  
Author(s):  
B. Gaković ◽  
I. Pongrac ◽  
S. Petrović ◽  
D. Minić ◽  
M. Trtica
Keyword(s):  
Thin Film ◽  
Titanium Nitride ◽  
Co2 Laser ◽  
Laser Energy ◽  
Target Surface ◽  
Laser Pulses ◽  
Tea Co2 Laser ◽  
Tin Film ◽  
Modification Of Titanium ◽  
Hydrodynamic Effects

In this work we investigated the interaction of ns laser pulses (TEA CO2 and Nd:YAG) with a titanium nitride (TiN) thin film. The TiN thin film of 1μm thickness was deposited by PVD method on silicon substrate. Modification of TiN film was induced by laser pulses with power densities of about 108 and 109 W/cm2. Part of the laser energy absorbed on the target surface was converted into thermal energy and effects such as melting, vaporization and exfoliation were observed. Nd:YAG laser produced craters with sharp periphery, while TEA CO2 laser created damages with broad boundary zone. Hydrodynamic effects were especially pronounced during irradiation with TEA CO2 laser.

scholarly journals Generation of 16 Micrometer IR Laser by theOptical Pumping of CF4 Gas Molecules

2008 ◽  
Vol 5 (3) ◽  
pp. 457-459
Author(s):  
Baghdad Science Journal
Keyword(s):  
Co2 Laser ◽  
Optical Pumping ◽  
Laser Action ◽  
Laser Pulses ◽  
Tea Co2 Laser ◽  
Ir Laser ◽  
Gas Molecules ◽  
Output Laser

We report here the observation of 16 µm superradiance laser action generated from optical pumping of CF4 gas molecules (which is cooled to 140 Kº by a boil-off liquid-N2) by a TEA-CO2 laser 9R12 line. Output laser pulses of 7 mJ and 200 ns have been obtained.

Self-effects of tea CO2 laser radiation in NH3

1990 ◽  
Vol 46 (4) ◽  
pp. 459-461
Author(s):  
R. Hernández-Vara ◽  
J.M.Herreros Alcocer ◽  
P.F. González-Díaz
Keyword(s):  
Laser Radiation ◽  
Co2 Laser ◽  
Tea Co2 Laser ◽  
Co2 Laser Radiation

Shock and compression of solids generated by TEA-CO2-laser pulses

1974 ◽  
Vol 10 (9) ◽  
pp. 734-734
Author(s):  
M. Siegrist ◽  
M. Gottret ◽  
F. Kneubuhl
Keyword(s):  
Co2 Laser ◽  
Laser Pulses ◽  
Tea Co2 Laser

scholarly journals Influence of the Distance between Focusing Lens and Target Surface on the Characteristics of Laser-excited Lead Plasma

2021 ◽  
pp. 4694-4701
Author(s):  
Qusay Adnan Abbas
Keyword(s):  
Electron Temperature ◽  
Pulse Laser ◽  
Electron Number Density ◽  
Laser Energy ◽  
Pulse Length ◽  
Target Surface ◽  
Spectral Lines ◽  
Stark Broadening ◽  
Number Density ◽  
Electron Number

      The present work investigated the effect of distance from target surface on the parameters of lead plasma excited by 1064nm Q-switched Nd:YAG laser. The excitation was conducted in air, at atmospheric pressure, with pulse length of 5 ns, and at different pulse laser energies. Electron temperature was calculated by Boltzmann plot method based on the PbI emission spectral lines (369.03 nm, 416.98 nm, 523.48, and 561.94 nm). The PbI lines were recorded at different distances from the target surface at laser pulse energies of 260 and 280 mJ. The emission intensity of plasma increased with increasing the lens-to-target distance. The results also detected an increase in electron temperature with increasing the distance between the focal lens and the surface of the target in all laser energies under study. In addition, the electron number density was determined by using the Stark broadening method. The data illustrated that the electron number density was increased with increasing the distance from target surface, reaching the maximum at a distance of 11 cm for all pulse laser energy levels under study.

K8 High-density stationary plasma on metallic targets under tea-CO2 laser radiation

1976 ◽  
Vol 18 (1) ◽  
pp. 102-103 ◽  
Author(s):  
A.M. Prokhorov ◽  
V.A. Batanov ◽  
F.B. Fedorov ◽  
I. Ursu ◽  
I.D. Apostol ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Co2 Laser ◽  
High Density ◽  
Tea Co2 Laser ◽  
Stationary Plasma ◽  
Co2 Laser Radiation
Sign in / Sign up

Export Citation Format

Share Document