Quantitative Analysis Of Vacuum-Ultraviolet Radiation From Nanosecond Laser-Zinc Interaction

Keywords

Laser-matter interaction; Laser-produced plasma; Non-local thermodynamic equilibrium population kinetics; Radiation-hydrodynamics; Seya-Namioka monochromator; Vacuum-ultraviolet spectroscopy

Abstract

The paper reports measurements of the vacuum-ultraviolet spectral irradiances of a flat zinc target over a wavelength region of 124–164 nm generated by 10 and 60 ns duration low-intensities, 5×109-3×1010 W cm−2, 1.06 μm wavelength laser pulses. Maximum radiation conversion efficiencies of 2.5%/2πsr and 0.8%/2πsr were measured for 60 and 10 ns laser pulses at the intensities of 5×109 and 1.4×1010 W cm−2, respectively. Atomic structure calculations using a relativistic configuration-interaction, flexible atomic code and a developed non-local thermodynamic equilibrium population kinetics model in comparison to the experimental spectra detected by the Seya-Namioka type monochromator reveal the strong broadband experimental emission originates mainly from 3d94p-3d94s, 3d94d-3d94p and 3d84p-3d84s, 3d84d-3d84p unresolved-transition arrays of double and triple ionized zinc, respectively. Two-dimensional radiation-hydrodynamics code is used to investigate time-space plasma evolution and spectral radiation of a 10 ns full-width-at-half-maximum Gaussian laser pulse-zinc interaction.

Publication Date

7-1-2018

Publication Title

Optics and Laser Technology

Volume

103

Number of Pages

1-7

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.optlastec.2018.01.006

Socpus ID

85040306749 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85040306749

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