Time-integrated images of linear striated filamentary laser sparks
Technical Report
·
OSTI ID:5191698
The dependence of time-integrated photographic and linear diode array images of linear striated filamentary laser sparks on gas pressure and laser energy is described. For sparks in air, it was found that the pressure regime 100-300 Torr produces images of minimum diameter (about 150 ..mu..m) and maximum sharpness. Diode array images exhibit longitudinal and transverse luminosity profiles which differ from photographic images due to different spectral sensitivities. These data are of value in using the linear laser spark as an imaging probe of inhomogeneous gases such as turbulent reacting flows and diffusion flames.
- Research Organization:
- Sandia National Labs., Livermore, CA (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5191698
- Report Number(s):
- SAND-81-8714; ON: DE82012518
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
640420 -- Fluid Physics-- Properties & Structure of Fluids-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISTRIBUTION
ELECTRIC DISCHARGES
ELECTRIC SPARKS
FLAMES
IMAGES
LUMINOSITY
OPTICAL PROPERTIES
PHOTOGRAPHY
PHYSICAL PROPERTIES
SPATIAL DISTRIBUTION
STRIATIONS
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
640420 -- Fluid Physics-- Properties & Structure of Fluids-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISTRIBUTION
ELECTRIC DISCHARGES
ELECTRIC SPARKS
FLAMES
IMAGES
LUMINOSITY
OPTICAL PROPERTIES
PHOTOGRAPHY
PHYSICAL PROPERTIES
SPATIAL DISTRIBUTION
STRIATIONS