Ion emission from plasmas produced by femtosecond pulses of short-wavelength free-electron laser radiation focused on massive targets: an overview and comparison with long-wavelength laser ablation

0584210 - ÚFP 2024 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Krása, J. - Nassisi, V. - Burian, Tomáš - Hájková, V. - Chalupský, J. - Jelínek, Šimon - Frantálová, K. - Krupka, Michal - Kuglerová, Z. - Singh, Sushil Kumar - Vozda, V. - Vyšín, L. - Wild, J. - Šmíd, M. - Perez-Martin, P. - Pan, X. - Kühlman, M. - Pintor, J. - Cikhardt, J. - Dreimann, M. - Eckermann, D. - Rosenthal, F. - Vinko, S. M. - Forte, A. - Gawne, T. - Campbell, T. - Ren, S. - Shi, Y. F. - Hutchinson, T. - Humphries, O. - Preston, T. - Makita, M. - Nakatsutsumi, M. - Köhler, A. - Harmand, M. - Toleikis, S. - Falk, K. - Juha, L.
Ion emission from plasmas produced by femtosecond pulses of short-wavelength free-electron laser radiation focused on massive targets: an overview and comparison with long-wavelength laser ablation.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 12578. Bellingham: SPIE, 2023, Roč. 12578 (2023), č. článku 125780J. ISBN 9781510662766. ISSN 0277-786X.
[Conference on Optics Damage and Materials Processing by EUV/X-ray Radiation VIII (XDam8). Prague (CZ), 24.04.2023-26.04.2023]
Grant CEP: GA MŠMT(CZ) LM2023068; GA ČR(CZ) GA20-08452S
Institucionální podpora: RVO:61389021
Klíčová slova: Ablation * femtosecond pulses * free-electron laser * ion acoustic velocity * ion detector function * ion diagnostics * ion rarefaction * ion scaling * nanosecond pulses * soft-x-ray laser * UV excimer laser
Obor OECD: Fluids and plasma physics (including surface physics)
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12578/2670113/Ion-emission-from-plasmas-produced-by-femtosecond-pulses-of-short/10.1117/12.2670113.short

We report on ion emission from plasma produced on thick targets irradiated with nanosecond and femtosecond pulses delivered by mid-ultraviolet and soft x-ray lasers, respectively. To distinguish between different ion acceleration mechanisms, the maximum kinetic energy of ions produced under different interaction conditions is plotted versus laser fluence. The transformation of the time-of-flight detector signal into ion charge density distance-of-flight spectra makes it possible to determine the mean kinetic energy of the fastest ion groups based on the influence of the acoustic velocity of ion expansion. This allows obtaining additional characteristics of the ion production. The final energy of the group of fast ions determined using the ion sound velocity model is an order of magnitude larger in the fs-XFEL interaction than in the ns-UV one. On the contrary, the ablation yield of ions in our experiment is seven orders of magnitude greater when applying ns-UV laser pulses, not only due to higher energies of UV laser pulses, but also due to a significant difference in interaction and ion formation mechanisms.
Trvalý link: https://hdl.handle.net/11104/0352179