Subthreshold erosion of an organic polymer induced by multiple shots of an X-ray free-electron laser

0533708 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Burian, Tomáš - Chalupský, Jaromír - Hájková, Věra - Toufarová, Martina - Vorlíček, Vladimír - Hau-Riege, S. - Krzywinski, J. - Bozek, J.D. - Bostedt, C. - Graf, A.T. - Jastrow, U.F. - Kreis, S. - London, R.A. - Messerschmidt, M. - Moeller, S. - Sobierajski, R. - Tiedtke, K. - De Grazia, M. - Auguste, T. - Carré, B. - Guizard, S. - Merdji, H. - Medvedev, Nikita - Juha, Libor
Subthreshold erosion of an organic polymer induced by multiple shots of an X-ray free-electron laser.
Physical Review Applied. Roč. 14, č. 3 (2020), s. 1-14, č. článku 034057. ISSN 2331-7019. E-ISSN 2331-7019
Grant CEP: GA MŠMT EF16_027/0008215
GRANT EU: European Commission(XE) 654148 - LASERLAB-EUROPE
Institucionální podpora: RVO:68378271
Klíčová slova: solids irradiated by energetic photons * PMMA exposition * free electron x-ray-laser LCLS * polymer-chain scissions * theoretical models
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 4.985, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevApplied.14.034057

In this contribution, an effective material erosion is reported in PMMA exposed to multiple accumulated pulses generated by the free-electron x-ray-laser Linac Coherent Light Source (LCLS, tuned at a photon energy of 830 eV, operated in Menlo Park at Stanford, CA, USA) at a fluence below the single-pulse ablation threshold. The effect is caused by polymer-chain scissions initiated by single photons carrying enough energy to break the C—C bounds. The subthreshold damage exhibits a nonlinear dose dependence resulting from a competition between chain scissions and cross-linking processes. Two theoretical models of the x-ray free-electron-laser-induced erosion are suggested, which provide an excellent agreement with the experimental results.
Trvalý link: http://hdl.handle.net/11104/0312014