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Title: Laser fluence dependence on emission dynamics of ultrafast laser induced copper plasma

Abstract

The characteristic emission features of a laser-produced plasma strongly depend strongly on the laser fluence. We investigated the spatial and temporal dynamics of neutrals and ions in femtosecond laser (800 nm, ~40 fs, Ti:Sapphire) induced copper plasma in vacuum using both optical emission spectroscopy (OES) and spectrally resolved two-dimensional (2D) imaging methods over a wide fluence range of 0.5-77.5 J/cm2. 2D fast gated monochromatic images showed distinct plume splitting between the neutral and ions especially at moderate to higher fluence ranges. OES studies at low to moderate laser fluence regime confirm intense neutral line emission over the ion emission whereas this trend changes at higher laser fluence with dominance of the latter. This evidences a clear change in the physical processes involved in femtosecond laser matter interaction at high input laser intensity. Furthermore, the obtained ion dynamics resulting from the OES, and spectrally resolved 2D imaging are compared with charged particle measurement employing Faraday cup and Langmuir probe and results showed good correlation.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [4]
  1. Raman Research Institute, Bangalore (India); Complessoe Univ. Monte S. Angelo, Napoli (Italy)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Purdue Univ., West Lafayette, IN (United States)
  3. Raman Research Institute, Bangalore (India)
  4. Complessoe Univ. Monte S. Angelo, Napoli (Italy)
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1339811
Report Number(s):
PNNL-SA-119809
Journal ID: ISSN 0021-8979; DN2001000
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 18; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; laser ablation (LA); Laser-produced plasma

Citation Formats

Anoop, K. K., Harilal, S. S., Philip, Reji, Bruzzese, R., and Amoruso, S. Laser fluence dependence on emission dynamics of ultrafast laser induced copper plasma. United States: N. p., 2016. Web. doi:10.1063/1.4967313.
Anoop, K. K., Harilal, S. S., Philip, Reji, Bruzzese, R., & Amoruso, S. Laser fluence dependence on emission dynamics of ultrafast laser induced copper plasma. United States. https://doi.org/10.1063/1.4967313
Anoop, K. K., Harilal, S. S., Philip, Reji, Bruzzese, R., and Amoruso, S. 2016. "Laser fluence dependence on emission dynamics of ultrafast laser induced copper plasma". United States. https://doi.org/10.1063/1.4967313. https://www.osti.gov/servlets/purl/1339811.
@article{osti_1339811,
title = {Laser fluence dependence on emission dynamics of ultrafast laser induced copper plasma},
author = {Anoop, K. K. and Harilal, S. S. and Philip, Reji and Bruzzese, R. and Amoruso, S.},
abstractNote = {The characteristic emission features of a laser-produced plasma strongly depend strongly on the laser fluence. We investigated the spatial and temporal dynamics of neutrals and ions in femtosecond laser (800 nm, ~40 fs, Ti:Sapphire) induced copper plasma in vacuum using both optical emission spectroscopy (OES) and spectrally resolved two-dimensional (2D) imaging methods over a wide fluence range of 0.5-77.5 J/cm2. 2D fast gated monochromatic images showed distinct plume splitting between the neutral and ions especially at moderate to higher fluence ranges. OES studies at low to moderate laser fluence regime confirm intense neutral line emission over the ion emission whereas this trend changes at higher laser fluence with dominance of the latter. This evidences a clear change in the physical processes involved in femtosecond laser matter interaction at high input laser intensity. Furthermore, the obtained ion dynamics resulting from the OES, and spectrally resolved 2D imaging are compared with charged particle measurement employing Faraday cup and Langmuir probe and results showed good correlation.},
doi = {10.1063/1.4967313},
url = {https://www.osti.gov/biblio/1339811}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 18,
volume = 120,
place = {United States},
year = {Tue Nov 08 00:00:00 EST 2016},
month = {Tue Nov 08 00:00:00 EST 2016}
}

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