Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates a strong discharge wave that travels as a narrow pulse along the wire surface.This traveling discharge efficiently emits secondary ra...Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates a strong discharge wave that travels as a narrow pulse along the wire surface.This traveling discharge efficiently emits secondary radiation with spectral characteristics that are mostly defined by the wire geometry.Several examples of designs are considered here in the context of generation of intense terahertz radiation with controllable characteristics for various scientific and technological applications.The proposed setup may be easily realized,and it has the merits of robustness,versatility,and high conversion efficiency(reaching several percent)of laser energy to terahertz radiation.展开更多
Collision of laser-driven subrelativistic high-density ion flows provides a way to create extremely compressed ion conglomerates and study their properties.This paper presents a theoretical study of the electrodynamic...Collision of laser-driven subrelativistic high-density ion flows provides a way to create extremely compressed ion conglomerates and study their properties.This paper presents a theoretical study of the electrodynamic implosion of ions inside a hollow spherical or cylindrical shell irradiated by femtosecond petawatt laser pulses.We propose to apply a very effective mechanism for ion acceleration in a self-consistent field with strong charge separation,based on the oscillation of laser-accelerated fast electrons in this field near the thin shell.Fast electrons are generated on the outer side of the shell under irradiation by the intense laser pulses.It is shown that ions,in particular protons,may be accelerated at the implosion stage to energies of tens and hundreds of MeV when a sub-micrometer shell is irradiated by femtosecond laser pulses with an intensity of 10^(21)–10^(23)W cm^(−2).展开更多
基金supported by the Ministry of Science and Higher Education of the Russian Federation(Agreement No.075-15-2021-1361).
文摘Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates a strong discharge wave that travels as a narrow pulse along the wire surface.This traveling discharge efficiently emits secondary radiation with spectral characteristics that are mostly defined by the wire geometry.Several examples of designs are considered here in the context of generation of intense terahertz radiation with controllable characteristics for various scientific and technological applications.The proposed setup may be easily realized,and it has the merits of robustness,versatility,and high conversion efficiency(reaching several percent)of laser energy to terahertz radiation.
基金supported by the Russian Science Foundation under Project No.21-11-00102。
文摘Collision of laser-driven subrelativistic high-density ion flows provides a way to create extremely compressed ion conglomerates and study their properties.This paper presents a theoretical study of the electrodynamic implosion of ions inside a hollow spherical or cylindrical shell irradiated by femtosecond petawatt laser pulses.We propose to apply a very effective mechanism for ion acceleration in a self-consistent field with strong charge separation,based on the oscillation of laser-accelerated fast electrons in this field near the thin shell.Fast electrons are generated on the outer side of the shell under irradiation by the intense laser pulses.It is shown that ions,in particular protons,may be accelerated at the implosion stage to energies of tens and hundreds of MeV when a sub-micrometer shell is irradiated by femtosecond laser pulses with an intensity of 10^(21)–10^(23)W cm^(−2).
