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6 June 2023 Modelling damage of alkene polymers irradiated with an XUV laser pulse (Conference Presentation)
Nikita Nikishev, Nikita Medvedev
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Proceedings Volume 12578, Optics Damage and Materials Processing by EUV/X-ray Radiation (XDam8); 125780C (2023) https://doi.org/10.1117/12.2665332
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic
Abstract
We study theoretically the response of polymers to ultrafast XUV irradiation. To determine damage threshold doses of polymers from the alkene group, we use the hybrid simulation toolkit XTANT-3 [1]. The code models nonequilibrium electron kinetics, the energy exchange between electrons and atoms via electron-ion (electron-phonon) coupling, nonthermal modification of the interatomic potential, and the induced atomic response. For each of examined polymers, we demonstrate that nonthermal damage is the main mechanism of response to irradiation. At low doses, local defects are formed (hydrogen detachment, cross-linking), whereas with the increase of the dose, molecular disintegration leads to the formation of metallic liquid. [1] N. Medvedev, V. Tkachenko, V. Lipp, Z. Li, B. Ziaja, 4open. 1 (2018) 3
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Nikita Nikishev and Nikita Medvedev "Modelling damage of alkene polymers irradiated with an XUV laser pulse (Conference Presentation)", Proc. SPIE 12578, Optics Damage and Materials Processing by EUV/X-ray Radiation (XDam8), 125780C (6 June 2023); https://doi.org/10.1117/12.2665332
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KEYWORDS
Polymers
Extreme ultraviolet
Modeling
Pulsed laser operation
Molecules
Lithium
Optical simulations
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