| 摘要 |
PURPOSE:To grasp positional relation and measuring direction of a magnetism measuring point to a testee easily and correctly in measuring a magnetism by arranging a Dewar containing a SQUID senser and a subject testee taking a light beam for reference, and measuring the magnetism at the subject testee by the SQUID senser. CONSTITUTION:Cross beams 11, 21, 31 are projected to a subject testee 4 and a Dewar 51 using three beam generation sources 1, 2, 3. Cross beam lines 12, 22 appear in the surface of the subject testee and the Dewar 51 by projection of the light beams, and a three-dimensional coordinates system (X, Y, Z) for a head part is visualized. In the meanwhile, where a 1-channel SQUID senser is contained in the Dewar 51, marks are put at positions projected in the surface of the Dewar 51 in the directions of X-, Y-, Z-axes. The Dewar 51 is moved to let the beam lines coincide with the marks. When the Z-axis of the head part coincides with the senser axis, a distance L from the orgin of the head coordinates system to the senser is measured. |
