NDLI: Investigation of gas-dynamic processes in optical discharges with an ablating polymer wall in air and vacuum conditions

Content Provider	Springer Nature Link
Author	Loktiov, E. Yu. Ovchinnikov, A. V. Protasov, Yu. Yu. Sitnikov, D. S.
Copyright Year	2011
Abstract	Experimental research results are presented on the formation dynamics and macrostructure of optical discharges of condensed matter of a polymer series ((C2F4) n , (CH2O) n ) under the action of a femtosecond laser (τ 0.5 ∼ 45–70 fs) pulses (I 0 ∼ 1013−1015 W/cm2) in the UV — NIR spectral region (λ ∼ 266, 400, 800 nm) under air and vacuum conditions. Electron density distributions in the near-surface area of the optical discharge, vapor expansion, and velocities of shock-wave front propagation are determined for the first time by precise laser pulse micro-interferometry with high spatial and time resolution. The correspondence is shown of the values of the laser ablation spectral-energy threshold, as determined by interference microscopy and the interferometry of a gas-plasma flow. An estimation technique for the total momentum of light-erosion gas-plasma flow in the sub-nanonewton range is proposed and implemented for the first time. The results of comparative analysis are presented on the laser radiation conversion efficiency at different stages of femtosecond optical discharges.
Starting Page	403
Ending Page	412
Page Count	10
File Format	PDF
ISSN	0018151X
Journal	High Temperature
Volume Number	49
Issue Number	3
e-ISSN	16083156
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-06-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Industrial Chemistry/Chemical Engineering Materials Science Atoms and Molecules in Strong Fields, Laser Matter Interaction Classical Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Engineering Condensed Matter Physics

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