Characterization of megahertz X-ray laser beams by multishot desorption imprints in PMMA

0540378 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Vozda, Vojtěch - Burian, Tomáš - Hájková, Věra - Juha, Libor - Enkisch, H. - Faatz, B. - Hermann, M. - Jacyna, I. - Jurek, M. - Keitel, B. - Klinger, D. - Loch, R. - Louis, E. - Makhotkin, I.A. - Ploenjes, E. - Saksl, K. - Siewert, F. - Sobierajski, R. - Strobel, S. - Tiedtke, K. - Toleikis, S. - de Vries, G. - Zelinger, Zdeněk - Chalupský, Jaromír
Characterization of megahertz X-ray laser beams by multishot desorption imprints in PMMA.
Optics Express. Roč. 28, č. 18 (2020), s. 25664-25681. ISSN 1094-4087
Grant CEP: GA ČR(CZ) GA17-05167s
GRANT EU: European Commission(XE) 654148 - LASERLAB-EUROPE
Institucionální podpora: RVO:68378271 ; RVO:61388955
Klíčová slova: multishot desorption imprints * free-electron laser (FEL) X-ray laser * poly(methyl methacrylate) (PMMA)
Obor OECD: Fluids and plasma physics (including surface physics); Physical chemistry (UFCH-W)
Impakt faktor: 3.894, rok: 2020
Způsob publikování: Open access

New challenges for beam diagnostic methods are introduced by modern free-electron laser (FEL) facilities capable of delivering powerful pulses at megahertz (MHz) repetition rates. In this paper, we report the first characterization of a defocused MHz 13.5-nm beam generated by the free-electron laser in Hamburg (FLASH) using the method of multi-pulse desorption imprints in poly(methyl methacrylate)(PMMA). The beam fluence profile is reconstructed in a novel and highly accurate way that takes into account the nonlinear response of material removal to total dose delivered by multiple pulses. The algorithm is applied to experimental data of single-shot ablation imprints and multi-shot desorption imprints at both low (10 Hz) and high (1 MHz) repetition rates. Reconstructed response functions show a great agreement with the theoretical desorption response function model.

Trvalý link: http://hdl.handle.net/11104/0318008