論文

査読有り
2019年7月

Enhancing laser beam performance by interfering intense laser beamlets

NATURE COMMUNICATIONS
  • A. Morace
  • ,
  • N. Iwata
  • ,
  • Y. Sentoku
  • ,
  • K. Mima
  • ,
  • Y. Arikawa
  • ,
  • A. Yogo
  • ,
  • A. Andreev
  • ,
  • S. Tosaki
  • ,
  • X. Vaisseau
  • ,
  • Y. Abe
  • ,
  • S. Kojima
  • ,
  • S. Sakata
  • ,
  • M. Hata
  • ,
  • S. Lee
  • ,
  • K. Matsuo
  • ,
  • N. Kamitsukasa
  • ,
  • T. Norimatsu
  • ,
  • J. Kawanaka
  • ,
  • S. Tokita
  • ,
  • N. Miyanaga
  • ,
  • H. Shiraga
  • ,
  • Y. Sakawa
  • ,
  • M. Nakai
  • ,
  • H. Nishimura
  • ,
  • H. Azechi
  • ,
  • S. Fujioka
  • ,
  • R. Kodama

10
1
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41467-019-10997-1
出版者・発行元
NATURE PUBLISHING GROUP

Increasing the laser energy absorption into energetic particle beams represents a long-standing quest in intense laser-plasma physics. During the interaction with matter, part of the laser energy is converted into relativistic electron beams, which are the origin of secondary sources of energetic ions, gamma-rays and neutrons. Here we experimentally demonstrate that using multiple coherent laser beamlets spatially and temporally overlapped, thus producing an interference pattern in the laser focus, significantly improves the laser energy conversion efficiency into hot electrons, compared to one beam with the same energy and nominal intensity as the four beamlets combined. Two-dimensional particle-in-cell simulations support the experimental results, suggesting that beamlet interference pattern induces a periodical shaping of the critical density, ultimately playing a key-role in enhancing the laser-toelectron energy conversion efficiency. This method is rather insensitive to laser pulse contrast and duration, making this approach robust and suitable to many existing facilities.

Web of Science ® 被引用回数 : 8

リンク情報
DOI
https://doi.org/10.1038/s41467-019-10997-1
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000474241100004&DestApp=WOS_CPL
URL
http://www.nature.com/articles/s41467-019-10997-1.pdf
URL
http://www.nature.com/articles/s41467-019-10997-1
ID情報
  • DOI : 10.1038/s41467-019-10997-1
  • ISSN : 2041-1723
  • eISSN : 2041-1723
  • Web of Science ID : WOS:000474241100004

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