<論文>飛翔体磁気クリーニングのための一次元Ring-core residual magnetometer

概要

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Our research group has developed high-sensitive ring-core magnetometers to be installed on spacecrafts. The magnetometers are so high-sensitive that bodies of spacecrafts have to be cleaned magnetically. The cleaning must be based on a measurement of weak residual magnetism of many parts of the spacecrafts. In order to measure the magnetism, a new device called the ring-core residual magnetometer is designed and constructed. Two ring cores A and B are fixed with a mutual distance of 50 cm so that their sensing axes are antiparallel to each other. Summerized signals of the outputs from the two cores are recorded with a pen recorder. Specimen to be measured is layed on a rotator at a distance of 20 cm from the core A and is rotated with the rotator around the three orthogonal axes of the specimen. Three-dimensional dipole moment of the specimen is obtained by executing a Fourier analysis of a set of the three sinusoidal curves on the magnetogram. The moments of seven different standard parts of spacecrafts are actually measured by our ring-core residual magnetometer. A possibility to construct a newer device called the three-dimensional ricrestometer is briefly discussed.
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