Erlangen 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
K: Fachverband Kurzzeit- und angewandte Laserphysik
K 7: Laser-Beam Matter Interaction - Laser Applications II
K 7.4: Vortrag
Donnerstag, 17. März 2022, 14:45–15:00, K-H4
Laboratory evidence for proton energization by collisionless shock surfing — •Alice Fazzini1, Weipeng Yao1,2, Sophia Chen3, Konstantin Burdonov1,2, Patrizio Antici3, Jérôme Béard3, Simon Bolanos1, Andrea Ciardi2, Raymond Diab1, Stanimir Kisyov3, Vincent Lelasseux1, Marco Miceli3, Salvatore Orlando3, Sergey Pikuz3, Evgeny Filippov3, Dragos Popescu3, Viorel Nastasa3, Quentin Moreno3, Guilhem Revet1, Emmanuel d'Humières3, Xavier Ribeyre3, and Julien Fuchs1 — 1LULI - CNRS, CEA, Ecole Polytechnique - F-91128 Palaiseau, France — 2Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005, Paris, France — 3Refer to J. Fuchs for the complete list of addresses
Collisionless shocks are present in many astrophysical phenomena, such as supernovae remnants and the Earth's bow shock. In these events, collisionless electromagnetic processes mediate the transfer of momentum and energy from the flowing plasma to the ambient one. Using our platform, where we couple high-power lasers (JLF/Titan at LLNL, and LULI2000) with strong magnetic fields, we have generated astrophysically relevant super-critical magnetized collisionless shocks. Kinetic Particle-In-Cell simulations based on our experimental results reveal that shock surfing acceleration is responsible for the energization of the background protons up to 100 keV. Our observations not only provide evidence of early stage ion acceleration by collisionless shocks, but they also highlight the role this mechanism plays in energizing ions initially at rest, with capacity to feed further stages of acceleration.