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Related Experiment Videos

Time resolved simulation of lightning by lip.

D S Jebens1, H S Lakkaraju, C P McKay

  • 1Physics Department, San Jose State University, USA.

Geophysical Research Letters
|February 7, 1992
PubMed
Summary
This summary is machine-generated.

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Laser-induced plasma (LIP) mimics natural lightning

Area of Science:

  • Plasma physics
  • Atmospheric science
  • Spectroscopy

Background:

  • Laser-induced plasma (LIP) offers a controlled method for studying high-energy atmospheric phenomena.
  • Understanding the physics of lightning is crucial for various applications, including chemical synthesis.

Purpose of the Study:

  • To investigate the time-resolved spectral characteristics of laser-induced plasma in air.
  • To compare the plasma state variables of LIP with those of natural lightning.
  • To assess the potential of LIP as a simulation model for lightning.

Main Methods:

  • Time-resolved optical emission spectroscopy was employed to analyze laser-induced plasma in air.
  • Electron temperature and density were measured at different time scales after plasma ignition.
Keywords:
NASA Center ARCNASA Discipline ExobiologyNASA Discipline Number 52-50NASA Program Exobiology

Related Experiment Videos

  • State variables of LIP were compared with established data for natural lightning.

    • Main Results:

    • Electron temperatures in LIP decreased from approximately 1.7 x 10^4 K at 600 ns to 1.2 x 10^4 K at 4 microseconds.
    • Electron densities ranged from 7.0 x 10^17/cm3 to 9.0 x 10^16/cm3 over the measured time period.
    • Both LIP and natural lightning initially exceed 16,000 K but relax to ambient pressure at different rates, approaching a similar 2000-4000 K range.

    Conclusions:

    • LIP provides a valuable experimental model for simulating aspects of natural lightning.
    • The observed similarities in temperature relaxation suggest LIP's relevance for studying lightning-induced chemical reactions.
    • Further research can leverage LIP for optimizing conditions for lightning-relevant chemical synthesis.