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  • 1
    Publication Date: 2011-08-16
    Description: A copper vapor laser utilizing copper chloride as a lasant in a heated discharge tube has been studied. The lasing action was observed only when two successive discharge current pulses at suitable time intervals were applied. The first pulse is considered to be a dissociation pulse to produce copper and chlorine atoms; the second to be a pumping pulse to produce population inversion. The maximum energy density measured to date was 17 microjoule/cu cm.
    Keywords: MASERS
    Type: Applied Physics Letters; 23; Nov. 1
    Format: text
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  • 2
    Publication Date: 2011-08-16
    Description: A copper vapor laser, utilizing a pulsed discharge transverse to a supersonic flow of copper vapor, argon, and helium and oscillating at 5106 and 5782 A, has been built and tested. Laser energy densities per pulse of 2.5 microjoules per cu cm have been achieved to date. Laser pulse widths of up to 185 nsec have been obtained with delay times after initiation of the current pulse of 220 to 250 nsec. Both the delay time and pulse width are in good agreement with theoretical predictions. Quenching of the laser pulse is shown to be due to a rapid increase in the rate of equilibration of the lasing levels by electron collisions, and to a decrease in the differential pumping of the lasing levels from the ground state because of a decay in the electron temperature.
    Keywords: MASERS
    Type: Applied Physics Letters; 21; Dec. 15
    Format: text
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  • 3
    Publication Date: 2019-06-27
    Description: Laser radar observations were made to provide information on the distribution of particulate material in the stratosphere between 33,000 feet and 98,000 feet. The observations are part of a program to assess the impact of climatic changes that may result from perturbation of the upper atmosphere by a world high-altitude aircraft fleet. Results are presented as vertical profiles of the scattering ratio and the aerosol backscattering ratio.
    Keywords: MASERS
    Type: NASA-CR-139273
    Format: application/pdf
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  • 4
    Publication Date: 2019-06-27
    Description: Nuclear laser excited by fission fragments produced in pulsed nuclear reactor
    Keywords: MASERS
    Type: FLORIDA UNIV. RES. ON URANIUM PLASMAS AND THEIR TECHNOL. APPL. 1971; P 53-62
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  • 5
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    In:  Other Sources
    Publication Date: 2019-07-13
    Description: Summary of the theoretical and experimental work dealing with nuclear lasers that has been completed during the last year (1971), and review of some new work which may help to establish the direction research in this field may take in the future. So far, the most successful experiments have been carried out utilizing nuclear enhancement of electrically excited CO2 lasers. The goal of attaining lasing in gases utilizing nuclear pumping without an applied electric field is much more difficult to achieve but is being pursued. No experimental or theoretical work has been undertaken thus far in the study of the class of lasers where high-energy particles are produced internally in high-temperature multiple ionized plasmas. Some new approaches to high-power nuclear lasers are suggested.
    Keywords: MASERS
    Type: Symposium on Uranium Plasmas: Research and Applications; Nov 15, 1971 - Nov 17, 1971; Atlanta, GA
    Format: text
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