The disclosure discloses a superconducting magnet system and a quench protection circuit thereof. The quench protection circuit includes: a superconducting unit, a first diode integrated element, a second diode integrated element, a third diode integrated element, a low-temperature superconducting switch, a thermal shield and a vacuum vessel. The superconducting unit is composed of M superconducting coils connected in series. The low-temperature superconducting switch is connected to the first superconducting coil and the M-th superconducting coil. The first diode integrated element is connected in parallel with the low-temperature superconducting switch; the thermal shield and the second diode integrated element are connected in series and then connected in parallel at both ends of any symmetrical coil subsets in the superconducting unit. The vacuum vessel and the third diode integrated element are connected in series and then connected in parallel at both ends of any symmetrical coil subset of the superconducting unit.

The disclosure discloses a superconducting magnet system and a quench protection circuit thereof. The quench protection circuit includes: a superconducting unit, a first diode integrated element, a second diode integrated element, a third diode integrated element, a low-temperature superconducting switch, a thermal shield and a vacuum vessel. The superconducting unit is composed of M superconducting coils connected in series. The low-temperature superconducting switch is connected to the first superconducting coil and the M-th superconducting coil. The first diode integrated element is connected in parallel with the low-temperature superconducting switch; the thermal shield and the second diode integrated element are connected in series and then connected in parallel at both ends of any symmetrical coil subsets in the superconducting unit. The vacuum vessel and the third diode integrated element are connected in series and then connected in parallel at both ends of any symmetrical coil subset of the superconducting unit.

Various implementations of the invention correspond to an improved vortex flux generator. In some implementations of the invention, the improved vortex flux generator includes a magnetic circuit configured to produce a magnetic field; a quench controller configured to provide a variable current; a vortex material configured to form and subsequently dissipate a vortex in response to the variable current, wherein upon formation of the vortex, a magnetic field density surrounding the vortex is urged to decrease, and wherein upon subsequent dissipation of the vortex, the urging to decrease ceases and the magnetic field density increases prior to a reformation of the vortex, and wherein the decrease of the magnetic field density and the increase of the magnetic field density correspond to a modulation of the magnetic field; an inductor disposed in a vicinity of the vortex such that the modulation of the magnetic field induces an electrical current in the inductor; and a dissipation superconductor electrically disposed in parallel with the vortex material and configured to carry, without quenching, an entirety of the variable current during dissipation of the vortex in the vortex material.

Various implementations of the invention correspond to an improved vortex flux generator. In some implementations of the invention, the improved vortex flux generator includes a magnetic circuit configured to produce a magnetic field; a quench controller configured to provide a variable current; a vortex material configured to form and subsequently dissipate a vortex in response to the variable current, wherein upon formation of the vortex, a magnetic field density surrounding the vortex is urged to decrease, and wherein upon subsequent dissipation of the vortex, the urging to decrease ceases and the magnetic field density increases prior to a reformation of the vortex, and wherein the decrease of the magnetic field density and the increase of the magnetic field density correspond to a modulation of the magnetic field; an inductor disposed in a vicinity of the vortex such that the modulation of the magnetic field induces an electrical current in the inductor; and a dissipation superconductor electrically disposed in parallel with the vortex material and configured to carry, without quenching, an entirety of the variable current during dissipation of the vortex in the vortex material.

This superconducting magnet includes: a superconducting coil that is formed by winding a first superconducting wire rod; a second superconducting wire rod, which is disposed by being thermally in contact with and electrically insulated from the superconducting coil, and which has a superconducting transition temperature that is lower than that of the first superconducting wire rod; voltage terminals that are disposed at a plurality of areas of the second superconducting wire rod; a voltmeter connected to the voltage terminals; and a switch circuit connected to the voltmeter. The switch circuit interrupts a current when receiving an output from the voltmeter, the current being one that is to be supplied to the superconducting coil.

This superconducting magnet includes: a superconducting coil that is formed by winding a first superconducting wire rod; a second superconducting wire rod, which is disposed by being thermally in contact with and electrically insulated from the superconducting coil, and which has a superconducting transition temperature that is lower than that of the first superconducting wire rod; voltage terminals that are disposed at a plurality of areas of the second superconducting wire rod; a voltmeter connected to the voltage terminals; and a switch circuit connected to the voltmeter. The switch circuit interrupts a current when receiving an output from the voltmeter, the current being one that is to be supplied to the superconducting coil.

Various implementations of the invention correspond to an improved vortex flux generator. In some implementations of the invention, the improved vortex flux generator includes a magnetic circuit configured to produce a magnetic field; a quench controller configured to provide a variable current; a vortex material configured to form and subsequently dissipate a vortex in response to the variable current, wherein upon formation of the vortex, a magnetic field density surrounding the vortex is urged to decrease, and wherein upon subsequent dissipation of the vortex, the urging to decrease ceases and the magnetic field density increases prior to a reformation of the vortex, and wherein the decrease of the magnetic field density and the increase of the magnetic field density correspond to a modulation of the magnetic field; an inductor disposed in a vicinity of the vortex such that the modulation of the magnetic field induces an electrical current in the inductor; and a dissipation superconductor electrically disposed in parallel with the vortex material and configured to carry, without quenching, an entirety of the variable current during dissipation of the vortex in the vortex material.

A magnetic field generating device includes a superconducting coil formed by winding a superconductive wire material; an unseparated conductor plate which includes an electric conductor and is placed such that the conductor plate is insulated from the superconducting coil and is adjacent to the superconducting coil in a winding axis direction of the superconducting coil, and one of main surfaces of the conductor plate faces the superconducting coil; and a protection circuit which is connected in parallel with the superconducting coil and attenuates a current flowing through the superconducting coil.

A magnetic field generating device includes a superconducting coil formed by winding a superconductive wire material; an unseparated conductor plate which includes an electric conductor and is placed such that the conductor plate is insulated from the superconducting coil and is adjacent to the superconducting coil in a winding axis direction of the superconducting coil, and one of main surfaces of the conductor plate faces the superconducting coil; and a protection circuit which is connected in parallel with the superconducting coil and attenuates a current flowing through the superconducting coil.

A superconducting magnet includes a superconducting coil, a refrigerant container, a radiation shield, a vacuum container, a refrigerating machine cooling an interior of the refrigerant container, a tubular current lead passing from outside of the vacuum container to inside of the refrigerant container electrically connected to the superconducting coil, a power source electrically connected to the current lead, a manometer measuring a pressure inside of the refrigerant container, a thermometer to measure a temperature of the current lead, and a control unit connected to each of the power source, the manometer, and the thermometer. The control unit raises an output of the power source to vary a value of a current flowing into superconducting coil only when a measurement value of the manometer is higher than or equal to a set value and a measurement value of the thermometer is lower than or equal to a set value.