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Author Malov, A. N. ♦ Orishich, A. M. ♦ Terent'eva, Ya S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ AIR FLOW ♦ CARBON DIOXIDE LASERS ♦ GLOW DISCHARGES ♦ KHZ RANGE ♦ MACH NUMBER ♦ NITROGEN ♦ NOZZLES ♦ OXYGEN ♦ PHOTON EMISSION ♦ PULSED IRRADIATION ♦ Q-SWITCHING ♦ SPECTRA ♦ WAVELENGTHS
Abstract The spectral characteristics of the thermal wake of a pulsating optical discharge (POD) in a supersonic air flow are studied. The POD is stimulated by radiation of a mechanically Q-switched, repetitively pulsed CO{sub 2} laser with a pulse repetition rate of 7 – 150 kHz and a power up to 4.5 kW. The flow is produced by means of the supersonic aerodynamic MAU-M setup having a conic nozzle with a critical cross-section size of 50 mm, the Mach number being 1.3 – 1.6. We describe in detail the system of optical diagnostics that allows the detection of the spectrum of the weak thermal wake glow against the background of high-power POD radiation. The glow of the thermal wake is due to the emission of light by atoms and ions of nitrogen and oxygen, carried by the flow in the form of hot low-density gas clouds (caverns). The wavelengths of the thermal wake emission and the data on the transitions, corresponding to the spectral lines are presented. (laser applications and other topics in quantum electronics)
ISSN 10637818
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-10-31
Publisher Place United States
Journal Quantum Electronics
Volume Number 45
Issue Number 10


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