PK-4 is an experiment designed to investigate complex plasmas (low-temperature plasmas containing microparticles, e.g. dust grains) in a combined dc/rf discharge under microgravity conditions on board of the international space station. Within the 35th and 36th ESA parabolic flight campaigns first experiments under microgravity conditions in a specially designed experiment set-up have been performed. A shear flow produced between the penetrating clouds as well as lane formation were observed. Lane formation is a non-equilibrium phenomena which takes place if a certain particle density is exceeded, for which it is easier for the particles to propagate if they form lanes. A similar behavior can be observed for pedestrians moving in large crowds. Finally, a specific dust wave with a steep particle density variation, a so called soliton, has been observed. Additional experiments are proposed for future parabolic flght campaigns.


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    Title :

    Parabolic flight experiments with PK-4


    Additional title:

    Parabolische Flugexperimente mit PK-4


    Contributors:
    Thoma, M.H. (author) / Höfner, H. (author) / Kretschmer, M. (author) / Ratynskaia, S. (author) / Morfill, G.E. (author) / Usachev, A. (author) / Zobnin, A. (author) / Petrov, O. (author) / Fortov, V. (author)


    Publication date :

    2006


    Size :

    4 Seiten, 5 Bilder, 8 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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