Preprint Article Version 1 This version is not peer-reviewed

Measurements of Gaseous Hydrogen-Nitrogen Laser-Plasma

Version 1 : Received: 14 June 2019 / Approved: 14 June 2019 / Online: 14 June 2019 (15:01:44 CEST)

A peer-reviewed article of this Preprint also exists.

Parigger, C.G. Measurements of Gaseous Hydrogen–Nitrogen Laser-Plasma. Atoms 2019, 7, 61. Parigger, C.G. Measurements of Gaseous Hydrogen–Nitrogen Laser-Plasma. Atoms 2019, 7, 61.

Journal reference: Atoms 2019, 7, 61
DOI: 10.3390/atoms7030061

Abstract

This work communicates laser-plasma experiments in a gaseous mixture of hydrogen and nitrogen. Time-resolved spectroscopy measures the first four Balmer series hydrogen lines together with selected neutral and ionized nitrogen lines. Optical breakdown plasma is generated in a 1:1 hydrogen:nitrogen mixture at ambient temperature and 0.27-atm pressure. Time-resolved spectroscopy records emitted radiation with spatial resolution along the slit height for the Hα, Hβ, Hγ, and Hδ lines. For 13 selected time delays from 0.25 µs to 3.25 µs and 0.025 µ gate-widths, micro-plasma diagnostics is evaluated. Of interest are the peak-separation and width of Hδ and width of Hγ for electron densities in the range of 0.1 to 1.0×1017 cm-3, and comparisons with Hβ and Hα diagnostics. Integral inversions interrogate spatial distributions of the plasma expansion. Applications include laboratory and stellar astrophysics plasma diagnosis.

Subject Areas

atomic and molecular spectroscopy; time-resolved spectroscopy; laser plasma; laser-induced optical breakdown; stellar astrophysics spectra; white dwarf stars; hydrogen

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