APPARATUS AND METHOD FOR DETERMINING MAGNETIC SUSCEPTIBILITY

摘要

The invention relates to an apparatus and method for high-sensitivity non-destructive evaluation of the magnetic susceptibility. An apparatus for determining magnetic susceptibility in an object, the temperature being maintained at approximately 77K, the apparatus comprising a permanent magnet (12), a superconducting quantum interference device (14) constructed from material having a critical temperature above 77K, and a flexible superconducting flux transformer (16) that couples the susceptibility signal to the superconducting quantum interference device, the transformer comprising superconducting material disposed on a flexible metallic substrate.