Population Inversions in an Expanding Gas:  Theory and Experiment,

Anderson, John D., Jr.; Humphrey, Richard L.; Vamos, John S.; Plummer, Michael J.; Jensen, Richard E.

Population Inversions in an Expanding Gas: Theory and Experiment,

Active / Technical Report | Accession Number: AD0732374 |

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Abstract:

It is well established that population inversions between the 001 and 100 vibrational energy levels of CO2 can be created by rapid expansions of CO2-N2-H2O or He mixtures through supersonic nozzles. New experimental results are presented for such inversions. These experiments were conducted in both the 3-Megawatt Arc Tunnel and the 12.7 cm Shock Tunnel at the Naval Ordnance Laboratory. The results support previously published theoretical predictions obtained with a numerical, time-dependent, nonequilibrium nozzle flow analysis employing a simplified vibrational kinetic model. This theory is also compared with experimental data obtained by other investigators. Author

Author(s):

Anderson, John D., Jr. ; Humphrey, Richard L. ; Vamos, John S. ; Plummer, Michael J. ; Jensen, Richard E.

Author Organization(s):

NAVAL ORDNANCE LAB WHITE OAK MD

Pagination:

0041

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

RECORD

Collection: TR

Identifying Numbers

Report Number(s):

NOLTR-71-116

Project Number(s):

ORD-832-128/312-31

Subject Terms

Joint Capability Areas:

JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means

Communities of Interest:

No COI(s) Identified

Descriptor(s):

*GAS LASERS, SUPERSONIC NOZZLES, SUPERSONIC FLOW, SHOCK TUBES, GAIN, INFRARED LASERS

Field(s)/Group(s):

Lasers and Masers

Keyword(s):

*CARBON DIOXIDE LASERS, *GAS DYNAMIC LASERS

Report Date:

1971 Jun 28