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      https://www.ias.ac.in/article/fulltext/pram/085/01/0105-0114

    • Keywords

       

      Atomic emission spectroscopy; laser-induced breakdown spectroscopy, plasma; electron temperature; electron density.

    • Abstract

       

      Measurements of 1064 nm laser-induced egg shell plasma parameters are presented in this paper. Of special interests were its elemental identification and the determination of spectroscopic temperature and electron density. The electron temperature of 5956 K was inferred using an improved iterative Boltzmann plot method with six calcium atomic emission lines, and the electron number density of 6.1 × 1016 cm−3 was determined by measuring the width of Stark-broadened once-ionized calcium line at 393.37 nm. Based on the experimental results, the laser-induced egg shell plasma was verified to be optically thin and satisfy local thermodynamic equilibrium (LTE). Furthermore, experiments also demonstrated that the loss of energy due to the reflection of the laser beam from the plasma can be neglected and the inverse bremsstrahlung (IB) absorption was the dominant mechanism of plasma heating at the IR wavelength.

    • Author Affiliations

       

      Wenfeng Luo1 Xiaoxia Zhao2 Shuyuan Lv1 Haiyan Zhu1

      1. School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an, Shaanxi 710121, China
      2. School of Physics and Mechanical and Electronic Engineering, Xi'an University, Xi'an, Shaanxi 710065, China
    • Dates

       
  • Pramana – Journal of Physics | News

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