Matter and Radiation at Extremes (Nov 2021)

Commissioning experiment of the high-contrast SILEX-Ⅱ multi-petawatt laser facility

  • Wei Hong,
  • Shukai He,
  • Jian Teng,
  • Zhigang Deng,
  • Zhimeng Zhang,
  • Feng Lu,
  • Bo Zhang,
  • Bin Zhu,
  • Zenghai Dai,
  • Bo Cui,
  • Yuchi Wu,
  • Dongxiao Liu,
  • Wei Qi,
  • Jinlong Jiao,
  • Faqiang Zhang,
  • Zuhua Yang,
  • Feng Zhang,
  • Bi Bi,
  • Xiaoming Zeng,
  • Kainan Zhou,
  • Yanlei Zuo,
  • Xiaojun Huang,
  • Na Xie,
  • Yi Guo,
  • Jingqin Su,
  • Dan Han,
  • Ying Mao,
  • Leifeng Cao,
  • Weimin Zhou,
  • Yuqiu Gu,
  • Feng Jing,
  • Baohan Zhang,
  • Hongbo Cai,
  • Minqing He,
  • Wudi Zheng,
  • Shaoping Zhu,
  • Wenjun Ma,
  • Dahui Wang,
  • Yinren Shou,
  • Xueqing Yan,
  • Bin Qiao,
  • Yi Zhang,
  • Congling Zhong,
  • Xiaohui Yuan,
  • Wenqing Wei

DOI
https://doi.org/10.1063/5.0016019
Journal volume & issue
Vol. 6, no. 6
pp. 064401 – 064401-11

Abstract

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The results of a commissioning experiment on the SILEX-Ⅱ laser facility (formerly known as CAEP-PW) are reported. SILEX-Ⅱ is a complete optical parametric chirped-pulse amplification laser facility. The peak power reached about 1 PW in a 30 fs pulse duration during the experiment. The laser contrast was better than 1010 at 20 ps ahead of the main pulse. In the basic laser foil target interaction, a set of experimental data were collected, including spatially resolved x-ray emission, the image of the coherent transition radiation, the harmonic spectra in the direction of reflection, the energy spectra and beam profile of accelerated protons, hot-electron spectra, and transmitted laser energy fraction and spatial distribution. The experimental results show that the laser intensity reached 5 × 1020 W/cm2 within a 5.8 µm focus (FWHM). Significant laser transmission did not occur when the thickness of the CH foil was equal to or greater than 50 nm. The maximum energy of the accelerated protons in the target normal direction was roughly unchanged when the target thickness varied between 50 nm and 15 µm. The maximum proton energy via the target normal sheath field acceleration mechanism was about 21 MeV. We expect the on-target laser intensity to reach 1022 W/cm2 in the near future, after optimization of the laser focus and upgrade of the laser power to 3 PW.