Population Inversions in an Expanding Gas: Theory and Experiment,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 28, 1971
- Accession Number
- AD0732374
Entities
People
- John D. Anderson Jr.
- John S. Vamos
- Michael J. Plummer
- Richard E. Jensen
- Richard L. Humphrey
Organizations
- Naval Ordnance Laboratory