Ion emission from warm dense matter produced by irradiation with a soft x-ray free-electron laser

0585034 - FZÚ 2025 RIV US eng J - Journal Article
Krása, Josef - Burian, Tomáš - Hájková, Věra - Chalupský, Jaromír - Jelínek, Šimon - Frantálová, Kateřina - Krupka, Michal - Kuglerová, Zuzana - Singh, Sushil K. - Vozda, Vojtěch - Vyšín, Luděk - Šmíd, M. - Perez-Martin, P. - Cikhardt, J. - Toleikis, S. - Falk, Kateřina - Juha, Libor … Total 36 authors
Ion emission from warm dense matter produced by irradiation with a soft x-ray free-electron laser.
Matter and Radiation at Extremes. Roč. 9, č. 1 (2024), č. článku 016602. ISSN 2468-2047. E-ISSN 2468-080X
R&D Projects: GA MŠMT(CZ) LM2023068; GA ČR(CZ) GA20-08452S
EU Projects: European Commission(XE) 654148 - LASERLAB-EUROPE
Institutional support: RVO:68378271
Keywords : ion emission * x-ray free-electron laser interaction * warm dense matter
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 5.1, year: 2022
Method of publishing: Open access

We report on an experiment performed at the FLASH2 free-electron laser (FEL) aimed at producing warm dense matter via soft x-ray iso choric heating. In the experiment, we focus on study of the ions emitted during the soft x-ray ablation process using time-of-flight electron multipliers and a shifted Maxwell–Boltzmann velocity distribution model. We find that most emitted ions are thermal, but that some impu rities chemisorbed on the target surface, such as protons, are accelerated by the electrostatic field created in the plasma by escaped electrons. The morphology of the complex crater structure indicates the presence of several ion groups with varying temperatures. We find that the ion sound velocity is controlled by the ion temperature and show how the ion yield depends on the FEL radiation attenuation length in different materials.
Permanent Link: https://hdl.handle.net/11104/0352805