Time-Resolved Characterization of the Formation of a Collisionless Shock

H. Ahmed, M.E. Dieckmann, L. Romagnani, D. Doria, G. Sarri, M. Cerchez, E. Ianni, I. Kourakis, A.L. Giesecke, M. Notley, R. Prasad, K. Quinn, O. Willi, M. Borghesi

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Abstract

We report on the temporally and spatially resolved detection of the precursory stages that lead to the formation of an unmagnetized, supercritical collisionless shock in a laser-driven laboratory experiment. The measured evolution of the electrostatic potential associated with the shock unveils the transition from a current free double layer into a symmetric shock structure, stabilized by ion reflection at the shock front. Supported by a matching particle-in-cell simulation and theoretical considerations, we suggest that this process is analogous to ion reflection at supercritical collisionless shocks in supernova remnants.
Original languageEnglish
Article number205001
Number of pages5
JournalPhysical Review Letters
Volume110
Issue number20
Early online date14 May 2013
DOIs
Publication statusPublished - 17 May 2013

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