Nonviscous motion of a slow particle in the dust crystal under microgravity conditions

D. I. Zhukhovitskii (1), V. E. Fortov (1), V. I. Molotkov (1), A. M. Lipaev (1), V. N. Naumkin (1), H. M. Thomas (2), A. V. Ivlev (2), M. Schwabe (2), and G. E. Morfill (2)

(1) Joint Institute of High Temperatures, Russian Academy of Sciences, Moscow, Russia, (2) Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse, Garching, Germany

Abstract—Subsonic motion of a large particle moving through the bulk of a dust crystal formed by negatively charged small particles is investigated using the PK-3 Plus laboratory onboard the International Space Station. Tracing the particle trajectories show that the large particle moves almost freely through the bulk of plasma crystal, while dust particles move along characteristic alpha-shaped pathways near the large particle. In the hydrodynamic approximation, we develop a theory of nonviscous dust particles motion about a large particle and calculate particle trajectories. A good agreement with experiment validates our approach.


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