scholarly journals Local thermodynamic equilibrium in a laser-induced plasma channel formed by interaction of femtosecond laser radiation with argon

2021 ◽  
Vol 2131 (5) ◽  
pp. 052090
Author(s):  
D A Kochuev ◽  
A F Galkin ◽  
A S Chernikov ◽  
R V Chkalov ◽  
A A Voznesenskaya ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Thermodynamic Equilibrium ◽  
Local Thermodynamic Equilibrium ◽  
Plasma Channel ◽  
Necessary Condition ◽  
Femtosecond Laser Radiation ◽  
Free Electrons ◽  
Saha Equation ◽  
Laser Induced Plasma

Abstract In this paper, we estimate the possibility of applying local thermodynamic equilibrium conditions for a laser-induced plasma channel formed by femtosecond laser radiation in an argon medium at different pressures. The presence of a local thermodynamic equilibrium was determined on the basis of the time of heat exchange of electrons with argon atoms. The Saha equation is used to estimate the concentration of free electrons, the temperature of the laser-induced plasma channel, and its conductivity. A necessary condition for using this ratio was the presence of a state of local thermodynamic equilibrium in the plasma under study.

STUDY OF PROPERTIES OF LASER-INDUCED PLASMA CHANNELS FODMED BY FEMTOSECOND LASER RADIATION

2020 ◽  
Vol 47 (2) ◽  
pp. 37-42
Author(s):  
D. A. Kochuev ◽  
A. F. Galkin ◽  
A. A. Voznesenskaya ◽  
K. S. Khorkov ◽  
R. V. Chkalov
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Radiation ◽  
Laser Induced Plasma ◽  
Plasma Channels

Plasma channel formation and micromodification of KDP crystal by tightly focused Cr:forsterite femtosecond laser radiation

2006 ◽  
Author(s):  
V. M. Gordienko ◽  
I. A. Makarov ◽  
P. M. Mikheev ◽  
A. A. Shashkov ◽  
V. S. Syrtsov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Plasma Channel ◽  
Femtosecond Laser Radiation ◽  
Channel Formation ◽  
Kdp Crystal

Nonlinear optical diagnostics of local crystallization of lead zirconate titanate films using femtosecond laser radiation

2015 ◽  
Vol 41 (5) ◽  
pp. 418-421 ◽  
Author(s):  
A. S. Elshin ◽  
N. Yu. Firsova ◽  
M. A. Marchenkova ◽  
V. I. Emel’yanov ◽  
I. P. Pronin ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Lead Zirconate Titanate ◽  
Nonlinear Optical ◽  
Optical Diagnostics ◽  
Lead Zirconate ◽  
Femtosecond Laser Radiation ◽  
Zirconate Titanate

scholarly journals The accumulation of femtosecond laser radiation energy in crystals of lithium fluoride

2015 ◽  
Author(s):  
V. P. Dresvyanskiy ◽  
D. S. Glazunov ◽  
S. V. Alekseev ◽  
V. F. Losev ◽  
B. Chadraa ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Lithium Fluoride ◽  
Radiation Energy ◽  
Femtosecond Laser Radiation ◽  
Laser Radiation Energy

scholarly journals Laser-Induced Streams in Liquids Depending on Focusing Conditions of Pulse-Periodic Femtosecond Laser Radiation

2019 ◽  
Vol 20 (3) ◽  
pp. 1-17
Author(s):  
S.Yu. Lavrentyev ◽  
◽  
N.G. Solovyov ◽  
A.N. Shemyakin ◽  
M.Yu. Yakimov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Radiation

scholarly journals On the violation of local thermodynamic equilibrium in the plasma jet of an argon arc two-jet plasmatron

2019 ◽  
Vol 85 (1II)) ◽  
pp. 145-150
Author(s):  
A. S. Cherevko ◽  
A. A. Morozova
Keyword(s):  
Energy Level ◽  
Equilibrium State ◽  
Thermodynamic Equilibrium ◽  
Local Thermodynamic Equilibrium ◽  
Plasma Jet ◽  
Saha Equation ◽  
Radiation Processes ◽  
Unconventional Method

The degree and nature of the violation of local thermodynamic equilibrium (LTE) in the analytical zone of a plasma jet generated by an argon arc two-jet plasmatron (TJP) was estimated using an unconventional method based on determination of the nonequilibrium parameterbiequal to the ratio of the experimentally determined actual population of the energy level (ni) of the element to the population of the same level calculated from the Saha equation (nis). Partial ionizing deviation of plasma under study from the equilibrium state takes place only when low-lying atomic levels are overpopulated. The distinct dependence ofbion the ionization potential of the considered element (e.g., Ca, Mg, and Be) is shown. The results were interpreted in the light of the increasing role of radiation processes upon excitation of spectra in the argon arc two-jet plasmatron.

scholarly journals Лазерно-индуцированные пространственно-периодические структуры на поверхности титана в среде н-гексана при различном давлении

2020 ◽  
Vol 46 (15) ◽  
pp. 51
Author(s):  
Д.А. Кочуев ◽  
К.С. Хорьков ◽  
А.С. Черников ◽  
Р.В. Чкалов ◽  
В.Г. Прокошев
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Laser Radiation ◽  
Pressure Range ◽  
Titanium Surface ◽  
Surface Structures ◽  
Femtosecond Laser Radiation ◽  
Periodic Surface ◽  
Laser Induced Plasma ◽  
Scanning Electron

The paper presents the results of processing titanium surface in n-hexane at various pressures by femtosecond laser radiation. The effect of laser-induced plasma on the nature of the formation of periodic surface structures in the pressure range from 6 mbar to 22 bar is considered. The study of the surface of the processed samples was carried out using scanning electron microscopy. The dependence of the period of obtained laser-induced periodic surface structures on the pressure in working vessel and the treatment regime is shown.

scholarly journals Nonlinear absorption of intense femtosecond laser radiation in air

2006 ◽  
Vol 14 (17) ◽  
pp. 7552 ◽  
Author(s):  
D. V. Kartashov ◽  
A. V. Kirsanov ◽  
A. M. Kiselev ◽  
A. N. Stepanov ◽  
N. N. Bochkarev ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Nonlinear Absorption ◽  
Femtosecond Laser Radiation
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