磁気シールドルームによる低磁場環境下での岩石残留磁化測定システムについて

Abstract

A magnetically shielded room (MSR) for paleomagnetic and rock magnetic experiments was constructed at Sakurajima Volcanological Observatory. The remaining dc magnetic field is less than 50 nT, one thousand of shielding factor with regard to the geomagnetic field, at inside the MSR. The MSR is surrounded by two layers of permalloy plate, and has no tight door and maze-like walls. Instruments for paleomagnetic measurements were installed in the MSR with taking special care for the disturbing magnetic field created by the instruments themselves. This MSR and instruments may produce very low noise environment for paleomagnetic experiments.