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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of fusion energy 1 (1981), S. 253-257 
    ISSN: 1572-9591
    Keywords: Pellet refueling ; drag effect ; penetration depth ; ablation models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A refueling pellet is subjected mainly to two kinds of drags: (1) inertial drag caused by the motion of the pellet relative to the surrounding plasma, and (2) ablation drag caused by an uneven ablation rate of the front and the rear surface of the pellet in an inhomogeneous plasma. Computational results showed that for reasonable combinations of pellet size and injection speed, the drag effect is hardly detectable for plasma conditions prevailing in current large tokamaks.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 270 (1974), S. 187-190 
    ISSN: 1618-2650
    Keywords: Best. von Seltenen Erden in Thorium ; Spektralanalyse ; Gleichstrombogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary An emission spectrographic determination of fifteen rare earth elements in thorium was developed, the spectrographic procedure was carried out using low current d.c. arc and using Sc as an internal standard. The rare earth impurities were concentrated with cation-exchange resin. Very high sensitivity was achieved with 1 g sample. The detection limits range from 0.01 μg for Yb to 0.5 μg for Pr and Nd.
    Notes: Zusammenfassung 15 Seltene Erdelemente konnten in Thorium bestimmt werden. Zur Anwendung kam ein Gleichstrombogen niederer Stromstärke. Als innerer Standard diente Scandium. Zur Anreicherung der Seltenen Erden wurde ein Kationenaustauscher verwendet. Mit 1 g-Proben konnten hohe Empfindlichkeiten erzielt werden. Die Nachweisgrenzen liegen im Bereich von 0,01 μg (Yb) bis 0,5 μg (Pr, Nd).
    Type of Medium: Electronic Resource
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