An Experimental System to Release Solid Particles in Microgravity Area Designed to Observe Field-induced Motions of Weakly Magnetic Particles

Int. J. Microgravity Sci. Appl. 2016p330307
Keiji HISAYOSHI and Chiaki UYEDA
Institute of Earth and Space Science, Graduate School of Science, Osaka University, Kasugaoka High-school of Osaka prefecture
Efficiency of observing translation and rotation of a sub-millimeter size sample at low magnetic field has considerably increased by improving the system to release small samples in microgravity (μG) area of reduced pressure. By measuring the period of rotational oscillation induced in a homogeneous field of 0.2T, anisotropy of paramagnetic susceptibility ΔχPARA was detected on a small paramagnetic crystal. By observing velocity vR of a translating grain at a position of B ~ 0, diamagnetic susceptibility χDIA is detected in a small grain. Here the position of sample stage was controlled for the purpose of releasing the samples in a μG area with small momentum. The obtained techniques to observe field-induced motions of sub-mm sized samples are a step forward to detect magnetization of a weakly magnetic particle of μm size.
Diamagnetic anisotropy, Diamagnetic particle, Field-induced translation, Dust alignment, Field-induced rotational oscillation, Release of sample

Received 18 September 2015, accepted 30 May 2016, published 31 July 2016.

© The Japan Society of Microgravity Applicaiton

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