飛翔体弱残留磁気測定装置 (RICRESTOMETER) の開発

概要

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In order to make a magnetic cleaning of various spacecraft bodies, it became necessary to measure very weak residual magnetisms of a lot of various parts of the bodies like resisters, condensers, screws, etc. So we constructed a high-sensitive RIng-Core RESidual magne TOMETER (RICRESTOMETER), which could be readily applied also for rock magnetism and paleomagnetism. A specimen was put at a distance of 10∿20cm for one of a pair of ring cores and is rotated by a speed of 2.3 rps. Difference of the signals from the two cores were stacked to sort out weak signals from various artificial noises. Frequency analysis was directly made to the stacked 2.3 Hz sinusoidal wave with our high-speed spectrum analyzer (HISSA). Thus, it became possible to measure weak residual magnetism of specimen (≳10^<-6>emu/cc) by our ricrestometer within 120 seconds even in the terrible artificial magnetic disturbances during daytime. The further design for the stacking and the frequency analysis is described.
宇宙航空研究開発機構の論文