Dynamics of Multi-Chain Dust Clouds in Microgravity.*

Dust clouds in microgravity have proven a versatile analog for the study of self-ordered (soft matter) systems, particularly those where structuring is determined by the redistribution of flow kinetic energy and local and global confinement. In this talk, data collected using the PK-4 device on the International Space Station (ISS) as part of Campaigns {\#}7 and {\#}9 will be discussed. This data will be compared to PK-4 BU data collected under gravity to allow examination of dust systems employing DC polarity switching and a RF field with a movable electrode. The redistribution of flow kinetic energy at the onset of polarity switching and the resulting formation and self-excited dynamics of multi-chain dust clouds during the application of polarity switching will also be examined..