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High Energy electron and proton acceleration by circularly polarized laser pulse from near critical density hydrogen gas target.

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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Sharma A

doi

10.1038/s41598-018-20506-x

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

2191

issue

1

issn

2045-2322

pii

10.1038/s41598-018-20506-x

journal_volume

8

pub_type

杂志文章

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