Characterization of suprathermal electrons inside a laser accelerated plasma via highly-resolved K-alpha-emission

0521397 - ÚFP 2020 RIV GB eng J - Článek v odborném periodiku
Šmíd, M. - Renner, Oldřich - Colaïtis, A. - Tikhonchuk, V.T. - Schlegel, T. - Rosmej, F. B.
Characterization of suprathermal electrons inside a laser accelerated plasma via highly-resolved K-alpha-emission.
Nature Communications. Roč. 10, September (2019), s. 1-8, č. článku 4212. E-ISSN 2041-1723
Grant CEP: GA MŠMT(CZ) LM2015083
GRANT EU: European Commission(XE) 633053 - EUROfusion
Institucionální podpora: RVO:61389021
Klíčová slova: ray * spectroscopy
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 12.121, rok: 2019
Způsob publikování: Open access
https://www.nature.com/articles/s41467-019-12008-9

Suprathermal electrons are routinely generated in high-intensity laser produced plasmas via instabilities driven by non-linear laser-plasma interaction. Their accurate characterization is crucial for the performance of inertial confinement fusion as well as for performing experiments in laboratory astrophysics and in general high-energy-density physics. Here, we present studies of non-thermal atomic states excited by suprathermal electrons in kJ-ns-laser produced plasmas. Highly spatially and spectrally resolved X-ray emission from the laser-deflected part of the warm dense Cu foil visualized the hot electrons. A multi-scale two-dimensional hydrodynamic simulation including non-linear laser-plasma interactions and hot electron propagation has provided an input for ab initio non-thermal atomic simulations. The analysis revealed a significant delay between the maximum of laser pulse and presence of suprathermal electrons. Agreement between spectroscopic signatures and simulations demonstrates that combination of advanced high-resolution X-ray spectroscopy and non-thermal atomic physics offers a promising method to characterize suprathermal electrons inside the solid density matter.
Trvalý link: http://hdl.handle.net/11104/0306028