Mechanical Design And Related Performance Test Of The Superconducting Gravity Instruments

This thesis concentrates on the mechanical design of a（superconducting gravitygradiometer, SGG）prototype, its installation method, the design and building of the testfacility.The thesis begins with a description of the work principles of SGG. Based on thetheories, the mechanical design of a prototype SGG is present. The mechanical systemincludes supporting parts for superconducting coils, the electro-magnetic shieldingstructure for superconducting circuits. The whole structure is of axial symmetry. Twosuperconducting accelerates are installed on the two opposite faces of the shield cylinder,thus form a compact SGG structure.The installation of superconducting coils is a key step for SGG installation. Thedesign of mould for coil installation and the detailed methods are present in this thesis.To test the performance of the SGG, a calibration facility has been designed andfabricated. It works with two lead cylinders rotating under the SGG Dewar, providing aperiodically varying sign of for2ng gravity acceleration, and about200E for gravitygradient. The calibration facility is isolated from the SGG installation station to reducethe vibration influence for SGG test.