High Power Laser and Particle Beams, Volume. 37, Issue 5, 052003(2025)

Theoretical investigation into effect of laser focal spot size on extreme ultraviolet radiation

Xiang Lan1, Xuecheng Li2, Shunyi Yang1, Huibo Tang1、*, Longyu Kuang2、*, and Guangyue Hu1,3、*
Author Affiliations
  • 1Key Laboratory of Geospace Environment of Chinese Academy of Sciences, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
  • 2Laser Fusion Research Center, CAEP, Mianyang 621900, China
  • 3Center for Excellence in Ultra-intense Laser Science (CEULS), Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 200031, China
  • show less
    Figures & Tables(14)
    Schematic diagram of the plasma expansion of laser-ablated planar target
    One-dimensional density and temperature profiles of plasma produced by laser ablated planar target and expanding along target normal[22]
    The process of modelling the density distribution of a two-dimensional transient expansion
    Electron temperature distribution in the transverse (a) and longitudinal (b) directions
    Spatial distribution of electron density at 2D steady-state expansion vs laser focal spot radii. The cases with laser focal spot radius of 60 μm, 105 μm, and 158 μm are present from left to right
    Steady state position and time to reach the corresponding position for each characteristic density surface for different focal spot sizes
    Spatial distribution of electron density(a), electron temperature(b), emissivity(c), net emissivity(d) at laser focal spot radius of 60 μm, and t = 1 ns, 2 ns, 7 ns. The 0.1nc density surface reaches stable location at 1 ns
    Spatial distribution of electron density(a), electron temperature(b), emissivity(c), net emissivity(d) at laser focal spot radius of 105 μm, and t = 2 ns, 4 ns, 11 ns from left to right. The 0.1nc density surface reaches stable location at 2 ns
    Spatial distribution of electron density(a), electron temperature(b), emissivity(c), net emissivity(d) at laser focal spot radius of 158 μm, and t = 3 ns, 6 ns, 15 ns from left to right. The 0.1nc density surface reaches stable location at 3 ns
    One-dimension longitudinal profiles along the R=0 line at laser focal spot radius of 60 μm at the moments of t=1 ns, 2 ns, 7 ns
    One-dimension longitudinal profiles along the R=0 line at laser focal spot radius of 105 μm at the moments of t=2 ns, 4 ns, 11 ns
    One-dimension longitudinal profiles along the R=0 line at laser focal spot radius of 158 μm, at the moments of t=3 ns, 6 ns, 15 ns
    Temporal evolution of instantaneous conversion efficiency ηce(t) at laser focal spot sizes of 60 μm (red), 105 μm (black), and 158 μm (blue)
    Time-averaged conversion efficiency ηace and length of effective radiation zone LEUV at the end of laser irradiation versus laser focal spot sizes
    Tools

    Get Citation

    Copy Citation Text

    Xiang Lan, Xuecheng Li, Shunyi Yang, Huibo Tang, Longyu Kuang, Guangyue Hu. Theoretical investigation into effect of laser focal spot size on extreme ultraviolet radiation[J]. High Power Laser and Particle Beams, 2025, 37(5): 052003

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Sep. 14, 2024

    Accepted: Nov. 29, 2024

    Published Online: May. 22, 2025

    The Author Email: Huibo Tang (tanghb@ustc.edu.cn), Longyu Kuang (kuangly0402@sina.com), Guangyue Hu (gyhu@ustc.edu.cn)

    DOI:10.11884/HPLPB202537.240327

    Topics