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  • 1
    Electronic Resource
    Electronic Resource
    Infrared Observations Of Dust Emission From Comet Hale-Bopp (1997)
    Springer
    Earth, moon and planets 78 (1997), S. 251-257 
    Details
    ISSN: 1573-0794
    Keywords: Comets ; infrared ; radio ; rotation ; surfaces ; origin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract We present infrared imaging and photometry of the bright, giant comet C/1995 O1 (Hale-Bopp). The comet was observed in an extended infrared and optical observing campaign in 1996–1997. The infrared morphology of the comet was observed to change from the 6 to 8 jet “porcupine” structure in 1996 to the “pinwheel” structure seen in 1997; this has implications for the position of the rotational angular momentum vector. Long term light curves taken at 11.3 μm indicate a dust production rate that varies with heliocentric distance as ∶ r−1.4. Short term light curves taken at perihelion indicate a rotational periodicity of 11.3 hours and a projected dust outflow speed of ∶ 0.4 km s−1. The spectral energy distribution of the dust on October 31, 1996 is well modeled by a mixture of 70% silicaceous and 30% carbonaceous non-porous grains, with a small particle dominated size distribution like that seen for comet P/Halley (McDonnell et al., 1991), an overall dust production rate of 2 × 105 kg s−1, a dust-to-gas ratio of ∶5, and an albedo of 39%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006261303055
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Analytical Model of a Plasma Reactor (2000)
    Springer
    Plasma chemistry and plasma processing 20 (2000), S. 23-35 
    Details
    ISSN: 1572-8986
    Keywords: plasma reactor ; analytical model ; destruction and removal efficiency ; boundary layer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract This paper presents a simple analytical model to estimate the effect of theboundary layer on the performance of a dc plasma reactor. A graphite linerwas inserted inside the reactor to raise the wall temperature. The model wasused to predict the Destruction and Removal Efficiency (DRE) of the reactorwith and without the graphite liner. The DRE of the device was measured forboth conditions and was found to be in close agreement with the predictedvalues. The model has shown that the DRE is a strong function of the walltemperature of the flight tube and is insensitive to the change in thetube's diameter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006917726340
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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