Desorption/ablation of lithium fluoride induced by extreme ultraviolet laser radiation

0462341 - FZÚ 2017 RIV PL eng J - Journal Article
Blejchař, T. - Nevrlý, V. - Vašinek, M. - Dostál, M. - Kozubková, M. - Dlabka, J. - Stachoň, M. - Juha, Libor - Bitala, P. - Zelinger, Zdeněk - Pira, Peter - Wild, J.
Desorption/ablation of lithium fluoride induced by extreme ultraviolet laser radiation.
Nukleonika. Roč. 61, č. 2 (2016), s. 131-138. ISSN 0029-5922. E-ISSN 1508-5791.
[PLASMA 2015 : International Conference on Research and Applications of Plasmas. Warsaw, 07.09.2015-11.09.2015]
R&D Projects: GA ČR(CZ) GAP108/11/1312
Institutional support: RVO:68378271 ; RVO:61388955
Keywords : desorption * fluid dynamics * lithium fluoride * numerical simulation * plume expansion * pulsed laser ablation
Subject RIV: BL - Plasma and Gas Discharge Physics; CF - Physical ; Theoretical Chemistry (UFCH-W)
Impact factor: 0.760, year: 2016

This study is focused on quantitative description of XUV laser-induced desorption/ablation from lithium fluoride, which is a reference large band-gap dielectric material with ionic crystalline structure. Computational framework was proposed and employed here for the reconstruction of plume expansion dynamics induced by the irradiation of lithium fluoride targets. The morphology of experimentally observed desorption/ablation craters were reproduced using two-zone approximation of the laser fluence profile. The calculation of desorption/ablation rate was performed using one-dimensional thermomechanic model (XUV-ABLATOR code) taking into account laser heating and surface evaporation of the lithium fluoride target occurring on a nanosecond timescale, followed by the application of two-dimensional hydrodynamic solver for description of laser-produced plasma plume expansion dynamics. The calculated plume lengths were compared with a simple adiabatic expansion (blast-wave) model.
Permanent Link: http://hdl.handle.net/11104/0262302