Detailed Experimental Study of Ion Acceleration by Interaction of an Ultra-Short Intense Laser with an Underdense Plasma

Abstract : Ion acceleration from intense (I lambda(2) > 1018 Wcm(-2) mu m(2)) laser-plasma interaction is experimentally studied within a wide range of He gas densities. Focusing an ultrashort pulse (duration. ion plasma period) on a newly designed submillimetric gas jet system, enabled us to inhibit total evacuation of electrons from the central propagation channel reducing the radial ion acceleration associated with ponderomotive Coulomb explosion, a mechanism predominant in the long pulse scenario. New ion acceleration mechanism have been unveiled in this regime leading to non-Maxwellian quasi monoenergetic features in the ion energy spectra. The emitted nonthermal ion bunches show a new scaling of the ion peak energy with plasma density. The scaling identified in this new regime differs from previously reported studies.
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Scientific Reports, Nature Publishing Group, 2016, 6, pp.31647. 〈10.1038/srep31647〉
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https://hal-ensta.archives-ouvertes.fr/hal-01394290
Contributeur : Aurélien Arnoux <>
Soumis le : mercredi 9 novembre 2016 - 10:18:42
Dernière modification le : jeudi 11 janvier 2018 - 06:23:19

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S. Kahaly, F. Sylla, Agustin Lifschitz, Alessandro Flacco, M. Veltcheva, et al.. Detailed Experimental Study of Ion Acceleration by Interaction of an Ultra-Short Intense Laser with an Underdense Plasma. Scientific Reports, Nature Publishing Group, 2016, 6, pp.31647. 〈10.1038/srep31647〉. 〈hal-01394290〉

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