AIP Advances (Dec 2020)

Demonstration of bright x-ray sources from solid and foam TiO2 targets at the Shenguang-III prototype laser facility

  • Yunsong Dong,
  • Shaoyong Tu,
  • Chuankui Sun,
  • Gao Niu,
  • Xingsen Che,
  • Minxi Wei,
  • Yukun Li,
  • Chuansheng Yin,
  • Xincheng Liu,
  • Ji Yan,
  • Jiyan Zhang,
  • Tianxuan Huang,
  • Wenyong Miao,
  • Jiamin Yang,
  • Shaoen Jiang

DOI
https://doi.org/10.1063/5.0024682
Journal volume & issue
Vol. 10, no. 12
pp. 125105 – 125105-8

Abstract

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Enhancement of x-ray sources from laser-produced plasmas is significant in wide-ranging applications. Solid and foam TiO2 targets were both used to generate bright x-ray sources at the Shenguang-III prototype laser facility, with a total laser power of 3.2 TW. The new foam targets were with an ultra-low initial density of 8.1 mg/cm3 and a high Ti fraction of 33 sat. %. By absolute measurements, the multi-keV x rays of the 4 keV–7 keV band and 1.6 keV–4.4 keV band and the total x rays above 0.1 keV of the foam target have simultaneously shown conversion enhancements of 1.4, 3.1, and 2.3 times, respectively, compared with the solid target. A much larger emission volume and an average electron temperature of 3.2 keV by moving the foci of laser beams inner were obtained for the foam target, providing a good condition for multi-keV x-ray production.