関西光科学研究所 >> KPSIセミナー >> Relativistic electron-positron jets from intense lasers
セミナー
第32回KPSIセミナー
Relativistic electron-positron jets from intense lasers
講演者 | PhD Hui Chen (USA ローレンス・リバモア国立研究所) |
---|---|
職位 | 博士 |
場所 | 関西光科学研究所 ITBL棟 G201号室 |
日時 | 2018年1月19日(金曜日)11時00分~12時00分 |
使用言語 | 英語 |
要旨 | [PDFファイル/201KB] |
Relativistic electron-positron jets from intense lasers
PhD Hui Chen
(USA ローレンス・リバモア国立研究所)
概要
High-flux jets of relativistic electron-positron pairs with a few trillion degree temperatures have been produced in experiments through the “Bethe-Heitler” process using high power lasers [1]. The laser intensities were 1018 - 1021 W/cm2 with pulse duration of 1-10 ps and energy 100 - 2000 J. Such a breakthrough enables the development of new diagnostic for high-energy-density physics [2], and leads a path toward the production of relativistic pair plasmas, allowing for interactive study of a state of matter otherwise found only in exotic astrophysical systems [3]. This talk will give an overview of the experimental results on the characterization of the laser produced relativistic positrons including their energy distribution, angular divergence and emittance. The inferred pair jet temperature & density and the pair production scaling with laser condition will be discussed. The presentation will conclude with a discussion of future possibilities for exploiting laser-produced pair jets and plasmas.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344, and funded by LDRD (#17-ERD-010).
参照:
[1].H. Chen, A. Link, Y. Sentoku et al., Phys. Plasmas 22, 056705(2015)
[2].G. J. Williams, H. Chen, J. Field, et al, Phys. Plasmas 24, 122704(2017)
[3].H. Chen, F. Fiuza, A. Link, et al., Phys. Rev. Lett. 114, 215001(2015)
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