Abstract <p>Temperature and voltage can be reduced during current removal in the case of passive protection by sectioning the superconducting magnet windings with diode-resistor circuits. The use of resistors as heaters that activate after the occurrence of normal zones accelerates the transition to the normal state of the superconductor of all sections, but systems of this kind require a large number of elements for multi-coil magnets. A more practical way to restore the windings of several sections to a normal state when shunting circuits with valve properties and arranging coils in a section of close inductance provides protection that effectively reduces the temperature and voltage limits in a multi-coil superconducting magnetic system.</p>

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Protection of a Partitioned Superconducting Magnetic System for Magnetic Resonance Imaging

  • M. A. Chernogubovsky,
  • M. S. Astrov,
  • S. A. Grigoriev

摘要

Abstract

Temperature and voltage can be reduced during current removal in the case of passive protection by sectioning the superconducting magnet windings with diode-resistor circuits. The use of resistors as heaters that activate after the occurrence of normal zones accelerates the transition to the normal state of the superconductor of all sections, but systems of this kind require a large number of elements for multi-coil magnets. A more practical way to restore the windings of several sections to a normal state when shunting circuits with valve properties and arranging coils in a section of close inductance provides protection that effectively reduces the temperature and voltage limits in a multi-coil superconducting magnetic system.