論文

査読有り
2017年2月13日

Boosting laser-ion acceleration with multi-picosecond pulses

Scientific Reports
  • A. Yogo
  • ,
  • K. Mima
  • ,
  • N. Iwata
  • ,
  • S. Tosaki
  • ,
  • A. Morace
  • ,
  • Y. Arikawa
  • ,
  • S. Fujioka
  • ,
  • T. Johzaki
  • ,
  • Y. Sentoku
  • ,
  • H. Nishimura
  • ,
  • A. Sagisaka
  • ,
  • K. Matsuo
  • ,
  • N. Kamitsukasa
  • ,
  • S. Kojima
  • ,
  • H. Nagatomo
  • ,
  • M. Nakai
  • ,
  • H. Shiraga
  • ,
  • M. Murakami
  • ,
  • S. Tokita
  • ,
  • J. Kawanaka
  • ,
  • N. Miyanaga
  • ,
  • K. Yamanoi
  • ,
  • T. Norimatsu
  • ,
  • H. Sakagami
  • ,
  • S. V. Bulanov
  • ,
  • K. Kondo
  • ,
  • H. Azechi

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記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/srep42451
出版者・発行元
Nature Publishing Group

Using one of the world most powerful laser facility, we demonstrate for the first time that high-contrast multi-picosecond pulses are advantageous for proton acceleration. By extending the pulse duration from 1.5 to 6 ps with fixed laser intensity of 1018 W cm-2, the maximum proton energy is improved more than twice (from 13 to 33 MeV). At the same time, laser-energy conversion efficiency into the MeV protons is enhanced with an order of magnitude, achieving 5% for protons above 6 MeV with the 6 ps pulse duration. The proton energies observed are discussed using a plasma expansion model newly developed that takes the electron temperature evolution beyond the ponderomotive energy in the over picoseconds interaction into account. The present results are quite encouraging for realizing ion-driven fast ignition and novel ion beamlines.

リンク情報
DOI
https://doi.org/10.1038/srep42451
URL
http://www.nature.com/articles/srep42451
URL
http://www.nature.com/articles/srep42451.pdf
ID情報
  • DOI : 10.1038/srep42451
  • ISSN : 2045-2322
  • eISSN : 2045-2322
  • SCOPUS ID : 85012303878

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