Speaker
Ricardo Florido
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P1.2013.pdf
Spectroscopic modeling of Ti K-α emission from planar targets irradiated
at laser intensities relevant for shock-ignition
R. Florido1 , J. M. Martín-González1 , M. A. Gigosos2 , G. Cristoforetti3 , L. Antonelli4 , F. Baffigi3 ,
F. Barbato5 , D. Batani6 , L. A. Gizzi3 , Ph. Nicolai6 , O. Renner7,8 , V. Tikhonchuk6
1 iUNAT - Departamento de Física, Universidad de Las Palmas de Gran Canaria, Spain
2 Departamento de Física Teórica, Atómica y Óptica, Univ. de Valladolid, Valladolid, Spain
3 Intense Laser Irradiation Laboratory, INO-CNR, Pisa, Italy
4 Department of Physics, University of York, York, United Kingdom
5 Empa Swiss Federal Laboratories for Materials Science and Technology, Dübendorf,
Switzerland
6 Centre Lasers Intenses et Applications, Université de Bordeaux-CNRS-CEA, Talence, France
7 Institute of Physics & ELI-Beamlines, Czech Academy of Sciences, Prague, Czech Republic
8 Institute of Plasma Physics & PALS Facility, Prague, Czech Republic
Shock-ignition (SI) is a promising ICF scheme relying on the assembly of a deuterium-tritium
mixture, and its ignition by a strong shock launched just before the end of the compression stage.
One of SI major issues is the interaction of the laser pulse with a long-scale-length plasma
formed by the CH ablator, and the impact of genereated hot electrons on shock formation and
propagation in the compressed shell. In planar-geometry experiments performed at the Prague
Asterix Laser System facility at SI-relevant laser intensities –i.e. I ∼ 1 − 3 × 1016 W/cm2 –, char-
acterization of hot electrons production and its connection with the development of parametric
instabilities is being investigated by application of X-ray spectroscopy [1, 2]. Here, we focus on
the collisional-radiative [3] study of Ti layer located at the rear side of irradiated plastic targets
and spectroscopic modeling of K-α emission produced after inner-shell ionization caused by
hot electrons. Sensitivity of spectral features to total amount and energy of hot electrons is as-
sessed. Also, for interpretation of observed spectra, we discuss synthetic spectra obtained from
post-processing of hydrodynamics simulations of reported experiments.
Acknowledgements
This work is supported by Research Grant No. ENE2015-67561-R from Spanish Ministry of
Economy and Competitiveness and EUROfusion Project No. AWP17-ENR-IFE-CEA-01.
References
[1] O. Renner et al., 10th IFSA International Conference, St. Malo (France), September 11-15 (2017).
[2] G. Cristoforetti et al., Phys. Plasmas 25, 012702 (2018).
[3] R. Florido et al., Phys. Rev. E 80, 056402 (2009).
