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  • American Institute of Physics (AIP)  (2)
  • 2015-2019
  • 2005-2009
  • 1990-1994  (2)
  • 1980-1984
  • 1992  (2)
Collection
Publisher
Years
  • 2015-2019
  • 2005-2009
  • 1990-1994  (2)
  • 1980-1984
Year
  • 1
    Electronic Resource
    Electronic Resource
    Laser drilling into an absorbing liquid (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 551-556 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The interaction of continuous CO2 laser radiation with water is described. Tightly focused radiation at powers of up to 120 W is used to generate and maintain a conical depression in the water surface similar to the keyhole created during laser penetration welding. The observed penetration depth of up to 7 mm is explained in terms of a hydrodynamic model and observations on the interaction induced liquid flows are described. The momentum reaction to the flow of steam up out of the keyhole generates a downward flow in the liquid around the keyhole with a velocity of ∼20 cm/s under the conditions of these experiments. The experiment has also been performed under variable gravity conditions provided by the NASA KC-135 Microgravity Aircraft to observe effects associated with changes in hydrostatic pressure and buoyancy on the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350404
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of H concentration in LiNbO3 by photorefractive fixing (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 3212-3214 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new method to determine the proton concentration in LiNbO3 is presented. The method is based on the measurement of the diffraction efficiency of a photorefractive grating in two situations. It is first measured after recording at room temperature, and second after saturation of the fixing process at a given temperature (about 150 °C). From only these two experimental data, the value obtained for the proton concentration in our sample is H0=(4.4±0.7)×1018 cm−3. This value agrees, within the experimental error, with that obtained from the infrared absorption arising from the OH− stretching bond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106742
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    Paper (German National Licenses)
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