High Power Laser Science and Engineering (Jan 2024)

Compression and acceleration processes of spherical shells in gold cones

  • Huigang Wei,
  • Dawei Yuan,
  • Shaojun Wang,
  • Ye Cui,
  • Xiaohu Yang,
  • Yanyun Ma,
  • Zhe Zhang,
  • Xiaohui Yuan,
  • Jiayong Zhong,
  • Neng Hua,
  • Yutong Li,
  • Jianqiang Zhu,
  • Gang Zhao,
  • Jie Zhang

DOI
https://doi.org/10.1017/hpl.2024.24
Journal volume & issue
Vol. 12

Abstract

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Double-cone ignition [Zhang et al., Phil. Trans. R. Soc. A 378, 20200015 (2020)] was proposed recently as a novel path for direct-drive inertial confinement fusion using high-power lasers. In this scheme, plasma jets with both high density and high velocity are required for collisions. Here we report preliminary experimental results obtained at the Shenguang-II upgrade laser facility, employing a CHCl shell in a gold cone irradiated with a two-ramp laser pulse. The CHCl shell was pre-compressed by the first laser ramp to a density of 3.75 g/cm3 along the isentropic path. Subsequently, the target was further compressed and accelerated by the second laser ramp in the cone. According to the simulations, the plasma jet reached a density of up to 15 g/cm3, while measurements indicated a velocity of 126.8 ± 17.1 km/s. The good agreements between experimental data and simulations are documented.

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