Open AccessPropagation distance-resolved characteristics of filament-induced copper plasma
Author(s) -
Isaac Ghebregziabher,
Kyle C. Hartig,
Igor Jovanovic
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.005263
Subject(s) - protein filament , plasma , copper , materials science , atomic physics , optics , electron density , ionization , dense plasma focus , plasma diagnostics , intensity (physics) , electron temperature , physics , ion , quantum mechanics , metallurgy , composite material
Copper plasma generated at different filament-copper interaction points was characterized by spectroscopic, acoustic, and imaging measurements. The longitudinal variation of the filament intensity was qualitatively determined by acoustic measurements in air. The maximum plasma temperature was measured at the location of peak filament intensity, corresponding to the maximum mean electron energy during plasma formation. The highest copper plasma density was measured past the location of the maximum electron density in the filament, where spectral broadening of the filament leads to enhanced ionization. Acoustic measurements in air and on solid target were correlated to reconstructed plasma properties. Optimal line emission is measured near the geometric focus of the lens used to produce the filament.