Over-critical sharp-gradient plasma slab produced by the collision of laser-induced blast-waves in a gas jet; Application to high-energy proton acceleration
J. -R. Marquès, P. Loiseau, J. Bonvalet, M. Tarisien, E. d'Humières, J. Domange, F. Hannachi, L. Lancia, O. Larroche, P. Nicolaï P. Puyuelo-Valdes, L. Romagnani… 展开作者
J. -R. Marquès, P. Loiseau, J. Bonvalet, M. Tarisien, E. d'Humières, J. Domange, F. Hannachi, L. Lancia, O. Larroche, P. Nicolaï P. Puyuelo-Valdes, L. Romagnani, J. Santos, V. Tikhonchuk
The generation of thin and high density plasma slabs at high repetition rate is a key issue for ultra-high intensity laser applications. We present a scheme to create such plasma slabs, based on the propagation and collision in a gas jet of two counter-propagating blast waves (BW). Each BW is launched by a sudden and local heating induced by a nanosecond laser beam that propagates along the side of the jet. The resulting cylindrical BW expands perpendicular to the beam. The shock front, bent by the gas jet density gradient, pushes and compresses the plasma toward the jet center. By using two parallel ns laser beams, this scheme enables to tailor independently two opposite sides of the jet, while avoiding the damage risks associated with counterpropagating laser beams. A parametric study is performed using two and three dimensional hydrodynamic, as well as kinetic simulations. The BWs bending combined with the collision in a stagnation regime increases the density by more than 10 times and generates a very thin (down to few microns), near to over-critical plasma slab with a high density contrast (> 100), and a lifetime of a few hundred picoseconds. Two dimensional particle-in-cell simulations are used to study the influence of plasma tailoring on proton acceleration by a high-intensity sub-picosecond laser pulse. Tailoring the plasma not only at the entrance but also the exit side of the ps-pulse enhances the proton beam collimation, increases significantly the number of high energy protons, as well as their maximum energy.
Laser-driven ion acceleration in long-lived optically shaped gaseous targets enhanced by magnetic vortices
Institute of Plasma Physics and Lasers‑IPPL, University Research and Innovation Centre, Hellenic Mediterranean University（等离子体物理与激光研究所-IPPL，赫尔曼地中海大学研究与创新中心）；Department of Electronic Engineering, Hellenic Mediterranean University（赫尔曼地中海大学电子工程系）；CEA, DAM, DIF（法国原子能和替代能源委员会，DAM，DIF）；Université Paris-Saclay, CEA, LMCE（巴黎萨克雷大学，法国原子能和替代能源委员会，LMCE）；University of Bordeaux, CNRS, CEA, CELIA（波尔多大学，法国国家科学研究中心，法国原子能和替代能源委员会，CELIA）；York Plasma Institute, School of Physics, Engineering and Technology, University of York（约克等离子体研究所，约克大学物理、工程与技术学院）；Department of Physics, University of Ioannina（约阿尼纳大学物理系）
Non-relativistic perpendicular shocks modeling young supernova remnants: nonstationary dynamics and particle acceleration at forward and reverse shocks
