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  • 1
    Electronic Resource
    Electronic Resource
    Thermal conductivity of heavily doped low-pressure chemical vapor deposited polycrystalline silicon films (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 1442-1447 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The lateral thermal conductivity of heavily doped low-pressure chemical vapor deposited polycrystalline silicon films is measured using polycrystalline silicon microbridges elevated three micrometers above a silicon substrate. The bridges, lightly doped in their central regions and heavily doped elsewhere, are fabricated using a sacrificial silicon-dioxide layer and phosphorus out-diffusion from doped oxide. Voltage-current characteristics measured on the bridges both under high vacuum and in silicone oil are used to calculate lateral thermal conductivity in the polycrystalline silicon. The experimental values for the thermal conductivity of heavily doped polycrystalline silicon range from 0.29 to 0.34 W cm−1 K−1 and average 0.32 W cm−1 K−1. These values agree closely with results obtained by a second method that employs uniformly doped polycrystalline silicon bridges. In the second method, high-vacuum, voltage-current characteristics are measured and the indicated thermal conductivities for two samples are 0.29 and 0.30 W cm−1 K−1, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339924
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Erratum: "Thermal conductivity of heavily doped low-pressure chemical vapor deposited polycrystalline silicon films'' [J. Appl. Phys. 63, 1442 (1988)] (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 3420-3420 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344503
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Active mode locking of a high pressure CW waveguide CO2 laser (1987)
    Springer
    Applied physics 44 (1987), S. 107-110 
    Details
    ISSN: 1432-0649
    Keywords: 42.55 E ; 42.60 D ; 42.60 F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper, we report on a new concept for active mode locking of lasers. It has been successfully applied to a cw waveguide CO2 laser and pulse widths as short as 2 ns have been obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694202
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    CW injection phase locking in homogeneously broadened media II. Phase locking and tunability of CO2 waveguide lasers (1987)
    Springer
    Applied physics 43 (1987), S. 273-279 
    Details
    ISSN: 1432-0649
    Keywords: 42.55 ; 42.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Injection phase locking of a powerful CO2 waveguide laser with a stable singlefrequency master oscillator is described. The locking range is experimentally investigated versus both injected signal frequency and slave cavity length. A locking tunability up to ±180 MHz from CO2 10P(20) line center has been achieved. Experimental results are in excellent agreement with the theoretical development exposed in the preceeding paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692498
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The variation of the mean size of the photospheric granules close to and away from a sunspot (1989)
    Springer
    Solar physics 122 (1989), S. 209-213 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study the mean size of granules as a function of distance from the boundaries of the sunspot penumbra. We use for the determination of the mean size two different methods, a visual and a photometric. In all cases the mean diameter of the granules away from the spot was greater than the mean diameter of the granules in the neighbourhood of the penumbra. Our study is based on an excellent sequence of photos, taken at the Pic-du-Midi Observatory on May 11, 1979.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00912992
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Center to limb variation of solar granulation (1989)
    Springer
    Solar physics 123 (1989), S. 185-188 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From high resolution white light photographs it is determined that the surface density of solar granulation decreases towards limb. A schematic model is proposed to interpret both decrease of surface density and size of granules in the upper photosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00150020
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  • 7
    Electronic Resource
    Electronic Resource
    Motions around a decaying sunspot (1987)
    Springer
    Solar physics 112 (1987), S. 295-303 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have measured the motion of facular points and granules in the same region near a decaying sunspot. It is found that both features move away across the moat surrounding the sunspot. The mean speed of facular points is larger than that of granules: 0.65 km s−1 and 0.4 km s−1, respectively. These results are consistent with previous measurements of the speed of bright network features and moving magnetic fields, as well as of non-magnetic photospherical material. They support models in which a decaying sunspot is at the center of a supergranule, whose horizontal motions sweep out granules and magnetic flux tubes associated to the facular points. It is also found that granules are dragged by supergranular motions away of the moat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00148783
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    On the structure of sunspot penumbra (1985)
    Springer
    Solar physics 98 (1985), S. 51-52 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The structure of sunspot penumbrae is discussed in terms of bright filaments on a dark background, as opposed to dark filaments above a bright granular background.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00177198
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    The fine structure of the quiet Sun (1985)
    Springer
    Solar physics 100 (1985), S. 237-255 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The observed properties of the small-scale features visible in the quiet photosphere — the granulation, of convective origin, and the network bright points, associated with kG magnetic fields — are described. The known properties of the magnetic flux tubes associated with network bright points are also presented. Empirical models derived from the observations are discussed, as well as a few theoretical models of particular importance for the understanding of the origin of the small-scale features of the quiet photosphere. Finally, the observational evidences showing that the structure of the granulation and of the photospheric network are varying over the solar cycle are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00158430
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  • 10
    Electronic Resource
    Electronic Resource
    Structure of the solar granulation (1986)
    Springer
    Solar physics 107 (1986), S. 11-26 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The structure of the solar granulation has been analysed using computer-processed images of two very high resolution (0″.25) white-light pictures obtained at the Pic-du-Midi Observatory. The narrow dispersion in the distribution of granule sizes is not confirmed. On the contrary, it is found that the number of granules increases continuously toward smaller scales; this means that the solar granulation has no characteristic or mean scale. Nevertheless, the granules appear to have a critical scale of 1″.37, at which drastic changes in the properties of granules occur; in particular the fractal dimension changes at the critical scale. The granules smaller than this scale could be of turbulent origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00155337
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