N. Walsh
Optical diagnostics of laser-produced aluminium plasmas under water
Walsh, N.; Costello, J. T.; Kelly, T. J.
Authors
J. T. Costello
T. J. Kelly
Abstract
We report on the findings of double-pulse studies performed on an aluminium target submerged in water using Nd:YAG laser pulses. Shadowgraphy measurements were performed to examine the dynamic behaviour of the cavitation bubble that eventually forms some considerable time post-plasma ignition. These measurements were used to inform subsequent investigations designed to probe the bubble environment. The results of time-resolved imaging from within the cavitation bubble following irradiation by a second laser pulse reveal the full dynamic evolution of a plasma formed in such an environment. Rapid displacement of the plasma plume in a direction normal to the target surface followed by a diffusive outwards expansion is observed and a qualitative model is proposed to explain the observed behaviour. Line profiles of several ionic and atomic species were observed within the irradiated cavitation bubble. Electron densities were determined using the Stark broadening of the Al II line at 466.3 nm and electron temperatures inferred using the ratio of the Al II (466.3 nm) and Al I (396.15 nm) lines. Evidence of self-reversal of neutral emission lines was observed at times corresponding to growth and collapse phases of the cavitation bubble suggesting high population density for ground state atoms during these times.
Citation
Walsh, N., Costello, J. T., & Kelly, T. J. (2017). Optical diagnostics of laser-produced aluminium plasmas under water. Applied physics. B, Lasers and optics, 123(6), Article 179. https://doi.org/10.1007/s00340-017-6754-3
Journal Article Type | Article |
---|---|
Acceptance Date | May 21, 2017 |
Online Publication Date | May 26, 2017 |
Publication Date | Jun 1, 2017 |
Deposit Date | Jun 29, 2018 |
Journal | Applied Physics B |
Print ISSN | 0946-2171 |
Publisher | Springer Verlag |
Peer Reviewed | Peer Reviewed |
Volume | 123 |
Issue | 6 |
Article Number | 179 |
DOI | https://doi.org/10.1007/s00340-017-6754-3 |
Public URL | https://hull-repository.worktribe.com/output/900446 |
Publisher URL | https://link.springer.com/article/10.1007/s00340-017-6754-3 |
You might also like
Sensitivity of nonlinear photoionization to resonance substructure in collective excitation
(2015)
Journal Article
Detection limits of organic compounds achievable with intense, short-pulse lasers
(2015)
Journal Article
Advanced undergraduate RC circuits: An experimentalist's perspective
(2015)
Journal Article
Two-electron processes in multiple ionization under strong soft-x-ray radiation
(2016)
Journal Article
Downloadable Citations
About Repository@Hull
Administrator e-mail: repository@hull.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search