Accession Number:

ADA129284

Title:

Spectroscopic Investigation of Laser-Initiated Low-Pressure Plasmas in Atmospheric Gases.

Descriptive Note:

Physical sciences research papers,

Corporate Author:

AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

Report Date:

1982-11-03

Pagination or Media Count:

11.0

Abstract:

Laser-initiated breakdown of N2, 02, and Ar has been investigated st sub-atmospheric pressures using a pulsed 10 ns Ndyttrium aluminum garnet NdYAG laser at 1.06 micrometers. Breakdown thresholds have been determined from 3 to 760 torr and spectral analysis of the plasma emission has been carried out over the range 300-600 nm. Sharp spectral features arising from highly excited singly and multiply charged ions are reported, as well as an underlying continuum at intermediate pressure. Time resolved measurements indicate a complex kinetic dynamic optical behavior. Author

Subject Categories:

  • Atmospheric Physics
  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE