Switching device used in MRI devices comprises a break made from a superconducting material, a unit for cooling the break to a prescribed operating temperature, and units for deviating a critical value of the superconducting material

摘要

Switching device comprises a break made from a superconducting material, a unit for cooling the break to a prescribed operating temperature, and units for deviating at least one of the critical values of the superconducting material to the transition from the superconducting state to the normal state of the break. Magnesium diboride is used as the superconducting material at operating temperatures of below 40 K. Preferred Features: The superconducting break has wire form with a round or rectangular cross-section. The wire (3) has a core (3a) made from magnesium diboride with a casing (3b) made from iron or steel. The break is arranged between heat sinks (5, 6).