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Superconductive magnetic-field-trapping device

An apparatus which enables the establishment of a magnetic field in air that has the same intensity as the ones in ferromagnetic materials is described. The apparatus is comprised of a core of ferromagnetic material and is surrounded by a cylinder made of a material that has superconducting properties when cooled below a critical temperature. A method is provided for producing a magnetic field through the ferromagnetic core. The core can also be split and pulled apart when it is required that the center of the cavity be left empty.

Hildebrandt, A. F.

Materials engineering

Thermal diffusivity measurement, thermoelectric properties of graphite alloys and compounds, superconductivity in tungsten films, and gas pump based on thermal transpiration

Altman, M.