Proceedings of the 12th Asia Pacific Physics Conference (APPC12) 2014
DOI: 10.7566/jpscp.1.015049
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Abstract: Dynamics of microscopic charged dust particles in cryogenic condition is studied experimentally. Dust particles were free falling through the liquid helium (LHe) vapor as well as through LHe. In the liquid, particles start to go up toward the surface. It was found that dust particles are charged negatively in vapor plasma, but lose the negative charge and became charged positively in the liquid, which is confirmed by the examination of the particle dynamics. Based on dust trajectories observed, the charge val…

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