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Journal of Applied Spectroscopy

, Volume 86, Issue 5, pp 836–842 | Cite as

Near-Surface Plasma Formed by Dual-Pulse Laser Action at Two Wavelengths on Titanium in Air

  • A. N. Chumakov
  • N. A. BosakEmail author
  • A. A. Ivanov
Article
  • 6 Downloads

Spectra and structures of near-surface plasma torches were studied experimentally by measuring the specific mass loss and plume luminosity caused by dual-pulse laser radiation at wavelengths 1064 and 532 nm on titanium in air as functions of the time between laser pulses and their sequence. Dependences of the laser-plasma temperature and concentration of charged particles on the paired laser pulse parameters were established at laser radiation power densities q1064 ≤ 3.1·109 and q532 ≤ 2.7·109 W/cm2 for λ = 1064 and 532 nm. The optimal conditions for recording erosion plasma spectra had the initial effect from second-harmonic radiation with a time interval between pulses of 4–5 μs; for specific mass loss, 3–6 μs. The results were important for enhancing the efficiency of laser emission spectral analysis and laser-plasma processing of materials.

Keywords

dual-pulse laser action laser plasma plasma-torch structure plasma temperature electron concentration specific mass loss 

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.B. I. Stepanov Institute of PhysicsNational Academy of SciencesMinskBelarus

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