Spectral output from a premixed chain reaction cw HF laser
Journal Article
·
· J. Appl. Phys.; (United States)
Spectral measurements of the output from a purely chemical chain reaction cw HF laser are reported. The laser is a subsonic H/sub 2/-F/sub 2/ flame, with supersonic premixing and spatially uniform initiation by a stationary normal shock. Initial chemical production of fluorine atoms is by the bimolecular reaction of F/sub 2/ with NO. Spectral measurements of the laser output near the initiating shock indicate lasing transitions in the P branches of the v=3 ..-->.. v=2, v=2 ..-->.. v=1, and v=1 ..-->.. v=0 HF bands. Further downstream, the upper vibrational levels are strongly deactivated, and lasing occurs only in the v=1 ..-->.. v=0 band. Laser emission in the v=2 ..-->.. v=1 band reappears at reduced NO flow rates, suggesting efficient deactivation of HF (v) by NO, possibly through multiquantum V-V exchange. An approximate rate of 5 x 10/sup -13plus-or-minus0.5/ cm/sup 3//sec for deactivation of HF (v=2) by NO is inferred.
- Research Organization:
- Center for Chemical and Environmental Physics, Aerodyne Research, Inc., Bedford Research Park, Crosby Drive, Bedford, Massachusetts 01730
- OSTI ID:
- 5347158
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 51:7; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chain reaction CW HF laser with stationary shock initiation
Design and performance characteristics of a cw subsonic HF chemical laser with 120 W power output
CW HF laser with supersonic premixing and stationary shock initiation. Final report 1 Jun 75-31 Dec 76
Journal Article
·
Fri Aug 01 00:00:00 EDT 1980
· AIAA J.; (United States)
·
OSTI ID:6760046
Design and performance characteristics of a cw subsonic HF chemical laser with 120 W power output
Journal Article
·
Thu Jul 01 00:00:00 EDT 1982
· Rev. Sci. Instrum.; (United States)
·
OSTI ID:5339947
CW HF laser with supersonic premixing and stationary shock initiation. Final report 1 Jun 75-31 Dec 76
Technical Report
·
Thu Mar 31 23:00:00 EST 1977
·
OSTI ID:5268170
Related Subjects
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ATOMS
CHALCOGENIDES
CHEMICAL LASERS
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
DATA
DE-EXCITATION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
FLAMES
FLUIDS
FLUORINE
HALOGENS
HYDROFLUORIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
LASER RADIATION
LASERS
MIXING
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SHOCK WAVES
SPECTRA
VIBRATIONAL STATES
420300* -- Engineering-- Lasers-- (-1989)
ATOMS
CHALCOGENIDES
CHEMICAL LASERS
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
DATA
DE-EXCITATION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
FLAMES
FLUIDS
FLUORINE
HALOGENS
HYDROFLUORIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
LASER RADIATION
LASERS
MIXING
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SHOCK WAVES
SPECTRA
VIBRATIONAL STATES