Ultracentrifuge apparatus to generate a strong acceleration field of over 1 000 000 g at a high temperature in condensed matter

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Abstract
An ultracentrifuge apparatus to generate a strong acceleration field of up to or higher than 1 000 000 (1×106) g at high temperature for long times has been developed for sedimentation of atoms in condensed matter. The system consists of a high‐temperature air turbine motor with oil‐floating bearing and a specimen rotor made of a titanium alloy. It was confirmed that the ultracentrifuge experiment could be performed for a maximum rotating speed greater than 220 000 rpm with a rotor inner diameter of 40 mm. The specimen could be heated to over 300 °C for durations of several days. The maximum acceleration field achieved was higher than 1.1×106 g for temperatures ≳200 °C. This apparatus can be used for strong acceleration field (mega‐gravity field) science in solids and liquids at high temperature.

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