Journal Article

PUBDB-2018-03099

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High Energy electron and proton acceleration by circularly polarized laser pulse from near critical density hydrogen gas target

Sharma, A. (Corresponding author)

2018
Nature Publishing Group London

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Please use a persistent id in citations: doi:10.1038/s41598-018-20506-x  doi:10.3204/PUBDB-2018-03099

Abstract: Relativistic electron rings hold the possibility of very high accelerating rates, and hopefully a relatively cheap and compact accelerator/collimator for ultrahigh energy proton source. In this work, we investigate the generation of helical shaped quasi-monoenergetic relativistic electron beam and high-energy proton beam from near critical density plasmas driven by petawatt-circularly polarized-short laser pulses. We numerically observe the efficient proton acceleration from magnetic vortex acceleration mechanism by using the three dimensional particle-in-cell simulations; proton beam with peak energy 350 MeV, charge ~10nC and conversion efficiency more than 6% (which implies 2.4 J proton beam out of the 40 J incident laser energy) is reported. We detailed the microphysics involved in the ion acceleration mechanism, which requires investigating the role of self-generated plasma electric and magnetic fields. The concept of efficient generation of quasi-monoenergetic electron and proton beam from near critical density gas targets may be verified experimentally at advanced high power – high repetition rate laser facilities e.g. ELI-ALPS. Such study should be an important step towards the development of high quality electron and proton beam.

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Contributing Institute(s):

1. European XFEL Projekt Team (Eur.XFEL)

Research Program(s):

1. 631 - Accelerator R & D (POF3-631) (POF3-631)
2. EUCALL - European Cluster of Advanced Laser Light Sources (654220) (654220)

Experiment(s):

1. No specific instrument

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