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Univ. Paris-Saclay

Sujet de stage / Master 2 Internship

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Radiation associated to particles plasma acceleration in laser – overdense plasma interaction at ultra high intensity.

Contact: RAYNAUD Michele, , michele.raynaud@cea.fr, +33 1 69 33 45 20
Possibility of continuation in PhD: Oui
Deadline for application:18/04/2023

Full description:
The possibility of developing new compact energetic particle and radiation sources via several mechanisms involving the interaction of an ultra-intense laser (intensity above 10^19 W/cm²) and plasmas has gained importance in the last decades. The possibility of resonantly excited relativistic surface plasma waves (SPW) [1], leading to high charge, ultrashort bunches along the target surface [2], reaching energies largely above their "quiver" energy has been proposed and demonstrated by our team. Advanced methods in laser techniques, such as the use of appropriate WFR to control the duration and energy of the electron bunches have been also studied [3].

An interesting point is the emission of extreme ultraviolet (XUV) correlated to the electrons acceleration in time and space. This aspect has been only partially studied by our group, and will be the topic of the internship. During the fellowship the trainee will reproduce 2D PIC simulations where electron acceleration occurs and study in detail the emitted radiation as function of some key parameters such as the laser intensity and the plasma density. The study will be conducted by the trainee in the LSI laboratory in Ecole Polytechnique in collaboration with TIPS, the theory and simulation group of LULI. The core of the internship will be performing extensive 2D Particle-In-Cell (PIC) simulation using the new, open-source and collaborative PIC code SMILEI [5].

The interested candidate should contact Michèle Raynaud a) and Caterina Ricondab). Knowing Python will prove necessary to use SMILEI but can be learned during the traineeship.

a) michele.raynaud-brun@polytechnique.edu et b) caterina.riconda@upmc.fr

[1] M. Raynaud, J. Kupersztych, C. Riconda, J-C Adam and A. Héron, Phys.Plasmas, 14, 092702 (2007)
A. Bigongiari, M. Raynaud, C. Riconda and A. Héron, Phys. Plasmas, 20, 052701 (2013)
T. Ceccotti et al. Phys. Rev. Lett. 111, 185001 (2013)
L. Fedeli et al., Phys. Rev. Lett. 116, 015001 (2016)
[2] M. Raynaud, A. Héron and J.-C. Adam, Phys. Plasma and Controled Fusion 60, 014021 (2018)
S. Marini, P. Klej, M. Grech, F. Amiranoff, C. Riconda and M. Raynaud, Phys. Plasmas 28, 073104 (2021) [3] S. Marini, P. Kleij, M. Grech, F. Pisani, F. Amiranoff, M. Raynaud, A. Macchi, and C. Riconda, Phys. Rev E 103, L021201 (2021)
[5] www.maisondelasimulation.fr/smilei
Technics/methods used during the internship:
Code Python

Tutor of the internship
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