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Title: Laser-induced breakdown spectroscopy using mid-infrared femtosecond pulses

Here, we report on a laser-induced breakdown spectroscopy (LIBS) experiment driven by mid-infrared (2.05-μm) fs pulses, in which time-resolved emission spectra of copper were studied. Ab-initio modeling is consistent with the results of new fs measurements at 2.05 μm and traditional 800-nm fs-LIBS. Ablation by mid-infrared fs pulses results in a plasma with a lower plasma density and temperature compared to fs-LIBS performed at shorter laser wavelength. LIBS driven by mid-infrared fs pulses results in a signal-to-background ratio ~50% greater and a signal-to-noise ratio ~40% lower than fs-LIBS at near-infrared laser wavelength.
Authors:
 [1] ; ORCiD logo [2] ;  [2] ;  [2] ;  [3]
  1. Pennsylvania State Univ., University Park, PA (United States). Dept of Mechanical and Nuclear Engineering; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Pennsylvania State Univ., University Park, PA (United States). Dept of Mechanical and Nuclear Engineering
Publication Date:
Grant/Contract Number:
NA0002534; DN-130-NF0001
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 4; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); US Department of Homeland Security (DHS)
Contributing Orgs:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1367664