Kinetic model of the active medium of a He - Ar laser pumped by a hard ioniser
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
- Japan Synchrotron Radiation Research Institute, Kouto (Japan)
A detailed nonstationary model of a He - Ar laser pumped by a hard ioniser is developed. It is found by numerical simulation that the pumping of the upper laser level is governed either by the three-body recombination of atomic argon ions with electrons or the dissociative recombination of molecular argon ions with electrons, depending on the argon content in a gas mixture. The conversion of dimer molecular argon ions into trimers, the quenching of the upper laser level by neutral atoms, and the spectral line broadening determine the optimum lasing conditions for the total mixture pressure and the partial argon pressure for different excitation conditions. The model adequately describes experiments using electron beam and nuclear pumping. The optimisation of a 1.79-{mu}m nuclear-pumped He - Ar laser in the VIR-2M reactor gave a maximum laser efficiency of 1.2 %. (lasers)
- OSTI ID:
- 21442810
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 3 Vol. 31; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ARGON IONS
ATOMS
BEAMS
CHARGED PARTICLES
COMPUTERIZED SIMULATION
DIMERS
EFFICIENCY
ELECTRON BEAMS
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GAS LASERS
GASES
HELIUM
IONS
LASERS
LEPTON BEAMS
LINE BROADENING
MANY-BODY PROBLEM
NONMETALS
NUCLEAR PUMPING
OPTIMIZATION
PARTICLE BEAMS
PUMPING
QUENCHING
RARE GASES
RECOMBINATION
SIMULATION
THREE-BODY PROBLEM