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Abstract <p>We report a detailed study of line X-ray emission from a nanosecond laser-produced copper plasma. The plasma is generated by a laser pulse (0.53 μm, 3 J, 2 ns) focused onto a massive target. The&#xa0;spectra are measured using a focusing crystal spectrometer. It is shown that the main contribution to the spectrum intensity is made by the satellite lines 1<i>s</i>2<i>s</i><sup><i>n</i></sup>2<i>p</i><sup><i>m</i></sup> – 1<i>s</i><sup>2</sup>2<i>s</i><sup><i>n</i></sup>2<i>p</i><sup><i>m</i></sup> <sup>– 1</sup>, occupying a narrow wavelength range (Δλ/λ = 0.035) near the resonance line of the [He]-like ion CuXXVIII (λ ∼ 1.5 Å). Using X-ray spectroscopy methods, the electron temperature of <i>T</i><sub><i>e</i></sub> = (1.4 ± 0.1) keV is measured, the relative intensities of lines of different ionization multiplicities (from the [He]-like ion CuXXVIII to the [O]-like ion CuXXII) are determined, and the absolute X-ray yield of <i>X</i> = 3 × 10<sup>9</sup> photons/sr is measured.</p>

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A Quasi-Monochromatic Source of Line X-Ray Emission Based on a High-Temperature Laser-Produced Copper Plasma

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • A. P. Shevelko

摘要

Abstract

We report a detailed study of line X-ray emission from a nanosecond laser-produced copper plasma. The plasma is generated by a laser pulse (0.53 μm, 3 J, 2 ns) focused onto a massive target. The spectra are measured using a focusing crystal spectrometer. It is shown that the main contribution to the spectrum intensity is made by the satellite lines 1s2sn2pm – 1s22sn2pm – 1, occupying a narrow wavelength range (Δλ/λ = 0.035) near the resonance line of the [He]-like ion CuXXVIII (λ ∼ 1.5 Å). Using X-ray spectroscopy methods, the electron temperature of Te = (1.4 ± 0.1) keV is measured, the relative intensities of lines of different ionization multiplicities (from the [He]-like ion CuXXVIII to the [O]-like ion CuXXII) are determined, and the absolute X-ray yield of X = 3 × 109 photons/sr is measured.