Patent ID: 6563312
Filing Date: 2003-05-13
Classification: F17C,F25J,G01R,H01F

Abstract:
A minimal magnetic-field measurement Dewar vessel including an inner container which contains a superconducting device and cooling medium; a radiation shield which is composed of an electrical insulation substrate and a first and second plurality of thin line stripes provided on opposite surfaces of said electrical insulation substrate so that said first plurality of thin line stripes is electrically insulated from said second plurality of thin line stripes and provided in a high stripe dense state; an outer container which surrounds said radiation shield, and in which a vacuum state is kept; and a cooling apparatus which cools said radiation shield;wherein a width of one portion of at least one of said first and second plurality of thin line stripes arranged in one area of said radiation shield surrounding said superconducting device is smaller than a width of another portion of said at least one of said first and second plurality of thin line stripes arranged in another area of said radiation shield, respectively.