Investigation on laser absorption and x-ray radiation in microstructured titanium targets heated by short-pulse relativistic laser pulses

0585128 - FZÚ 2025 RIV US eng J - Journal Article
Pan, X. - Šmíd, M. - Huang, L.G. - Falk, Kateřina … Total 22 authors
Investigation on laser absorption and x-ray radiation in microstructured titanium targets heated by short-pulse relativistic laser pulses.
Physical Review Research. Roč. 6, č. 1 (2024), č. článku 013025. E-ISSN 2643-1564
Institutional support: RVO:68378271
Keywords : high-intensity short-pulse laser irradiation of solid targets * laser-produced x-ray sources * x-ray Thomson scattering measurements * dense plasma
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 4.2, year: 2022
Method of publishing: Open access

The enhancement effect of a microstructured surface on laser absorption and characteristic Kα emission has been investigated by measuring K-shell emission from titanium (Ti) targets irradiated with high-intensity (∼1020 Wcm−2), subpicosecond (500 fs) laser pulses. The experimental results indicate a modest enhancement (1.6×) of Kα emission from microstructured targets compared to flat foils, but with a similar intensity and profile of Heα and Li-like satellites. Particle in-cell (PIC) simulations are implemented to further understand the underlying physical processes in the laser interaction with both targets, interpreting the mechanisms responsible for the Kα enhancement. The reasons for the lower-than-expected enhancement of Kα emission are discussed. The rapid heating of the bulk plasma might result in the premature shutdown of Kα emission before the thermalization of hot electrons or even the end of laser pulses.
Permanent Link: https://hdl.handle.net/11104/0352861