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  • 1
    Publication Date: 2019-06-27
    Description: Direct innervation of capillary endothelial cells in lamina propria of ferret stomach
    Keywords: BIOSCIENCES
    Type: NASA-CR-73139
    Format: application/pdf
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  • 2
    Publication Date: 2019-06-27
    Description: Ultrastructure of gastric glandular tissue of ferret for studies of physiological and pharmacological response of mammalian gastric mucosa
    Keywords: BIOSCIENCES
    Type: NASA-CR-73136
    Format: text
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  • 3
    Publication Date: 2019-07-13
    Description: The results of a two-year investigation into the possibility of developing continuous wave excimer lasers are reported. The program included the evaluation and selection of candidate molecular systems and discharge pumping techniques. The K Ar/K2 excimer dimer molecules and the xenon fluoride excimer molecule were selected for study; each used a transverse and capillary discharges pumping technique. Experimental and theoretical studies of each of the two discharge techniques applied to each of the two molecular systems are reported. Discharge stability and fluorine consumption were found to be the principle impediments to extending the XeF excimer laser into the continuous wave regime. Potassium vapor handling problems were the principal difficulty in achieving laser action on the K Ar/K2 system. Of the four molecular systems and pumping techniques explored, the capillary discharge pumped K Ar/K2 system appears to be the most likely candidate for demonstrating continuous wave excimer laser action primarily because of its predicted lower pumping threshold and a demonstrated discharge stability advantage.
    Keywords: LASERS AND MASERS
    Type: NASA-CR-155949
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  • 4
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    In:  CASI
    Publication Date: 2019-07-13
    Description: A theoretical and experimental investigation into the possibility of achieving CW discharge pumped excimer laser oscillation is reported. Detailed theoretical modeling of capillary discharge pumping of the XeF and KXe and K2 excimer systems was carried out which predicted the required discharge parameters for reaching laser threshold on these systems. Capillary discharge pumping of the XeF excimer system was investigated experimentally. The experiments revealed a lower excimer level population density than predicted theoretically by about an order of magnitude. The experiments also revealed a fluorine consumption problem in the discharge in agreement with theory.
    Keywords: LASERS AND MASERS
    Type: NASA-CR-154843 , AR-1
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