Abstract: A method includes: calculating a first optimum quantity of ferromagnetic arranged at each position so that each error component of a magnetic field distribution in a specific space satisfies a first restriction condition (S33, S34); discretizing, for each position, the first optimum quantity (S35); calculating the error components that are obtained when ferromagnetic having a quantity of the first combination is arranged at each position (S36); when the error component is less than the first lower limit, setting a condition including a lower limit greater than the first lower limit and an upper limit greater than the first upper limit as a second restriction condition, and when the error component is greater than the first upper limit, setting a condition including a lower limit less than the first lower limit and an upper limit less than the first upper limit as a second restriction condition (S38).

Abstract: A spool has a cylindrical outer shape extending in an axial direction intersecting an upward/downward direction, the spool having an outer circumferential surface in which a plurality of annular groove portions extending in a circumferential direction are formed with a space being interposed between the plurality of annular groove portions in the axial direction, a superconducting coil being wound and accommodated inside each of the plurality of annular groove portions. A cover portion is attached to the spool so as to cover each of the plurality of annular groove portions, the cover portion and the plurality of annular groove portions forming a plurality of annular flow paths for refrigerant to cool the superconducting coil. One or more communication paths extend in parallel with the axial direction to communicate adjacent annular flow paths of the plurality of annular flow paths with each other.

Abstract: A superconducting magnet includes: a superconducting coil; a coolant container; a radiation shield; a vacuum container; a refrigerator; a current lead; a first pipe including a mounting opening in which the refrigerator is inserted and fixed; a second pipe including a lead-out opening through which the current lead passes to be led out; and a flow rate ratio maintaining mechanism connected to at least one of the downstream side of the mounting opening of the first pipe and the downstream side of the lead-out opening of the second pipe, the flow rate ratio maintaining mechanism allowing the vaporized coolant to flow through the first pipe and the second pipe at a constant flow rate ratio.

Abstract: A superconducting magnet includes: a superconducting coil; a coolant container; a radiation shield; a vacuum container; a refrigerator; a current lead; a first pipe including a mounting opening in which the refrigerator is inserted and fixed; a second pipe including a lead-out opening through which the current lead passes to be led out; and a flow rate ratio maintaining mechanism connected to at least one of the downstream side of the mounting opening of the first pipe and the downstream side of the lead-out opening of the second pipe, the flow rate ratio maintaining mechanism allowing the vaporized coolant to flow through the first pipe and the second pipe at a constant flow rate ratio.

Abstract: A liquid crystal display apparatus includes a liquid crystal display panel having gate lines and source lines, a GIP circuit which drives the gate lines and a source driver IC3 which drives the source lines. The source driver IC3 includes a gate control signal generator which generates gate control signals SOUT1-SOUTn which control the GIP circuit. The gate control signal generator is configured so that it is possible to control the waveforms of the gate control signals SOUT1-SOUTn in software.

Abstract: There are provided the steps of: measuring a magnetic field in a predetermined space; and performing shimming by arranging a plurality of ferromagnetic shims in a superconducting magnet. The step of shimming includes arranging the plurality of shims at positions that make the magnetic field homogeneous, based on a result of measurement in the step of measuring the magnetic field and that provide a predetermined value of an electromagnetic force caused by the magnetic field to act on the plurality of shims.

Abstract: A method of the present invention includes: a step of shimming an MRI superconducting magnet in consideration of the magnetic field atmosphere of a use place; a step of generating a rated magnetic field in the MRI superconducting magnet thus shimmed, under an environment in which the magnetic field atmosphere of the use place is realized; and a step of installing the MRI superconducting magnet in the use place after the step of generating the rated magnetic field. This reduces possibility of occurrence of quench and improves stability in the MRI superconducting magnet.

Abstract: There are provided the steps of: measuring a magnetic field in a predetermined space; and performing shimming by arranging a plurality of ferromagnetic shims in a superconducting magnet. The step of shimming includes arranging the plurality of shims at positions that make the magnetic field homogeneous, based on a result of measurement in the step of measuring the magnetic field and that provide a predetermined value of an electromagnetic force caused by the magnetic field to act on the plurality of shims.

Abstract: A liquid crystal display apparatus includes a liquid crystal display panel having gate lines and source lines, a GIP circuit which drives the gate lines and a source driver IC3 which drives the source lines. The source driver IC3 includes a gate control signal generator which generates gate control signals SOUT1-SOUTn which control the GIP circuit. The gate control signal generator is configured so that it is possible to control the waveforms of the gate control signals SOUT1-SOUTn in software.

Abstract: A method of the present invention includes: a step of shimming an MRI superconducting magnet in consideration of the magnetic field atmosphere of a use place; a step of generating a rated magnetic field in the MRI superconducting magnet thus shimmed, under an environment in which the magnetic field atmosphere of the use place is realized; and a step of installing the MRI superconducting magnet in the use place after the step of generating the rated magnetic field. This reduces possibility of occurrence of quench and improves stability in the MRI superconducting magnet.

Abstract: A superconducting magnet device includes a main coil that generates a static magnetic field in an imaging space and a disturbance magnetic field compensation coil that suppresses influences of a variable magnetic field flowing inside from outside in the imaging space. The main coil is divided to at least two diode circuits. The disturbance magnetic field compensation coil has at least one coil formed of minus turns so that mutual inductances with the respective diode circuits in the main coil are made minimum.

Abstract: A shim support guide jig includes a shim support guide pipe in which a guide passage for guiding the movement of a shim support is formed. In a state where a superconducting magnet has generated a static magnetic field, the designated shim support can be drawn out from the internal space of the superconducting magnet through the guide passage, and the designated shim support for which magnetic material shims have been arranged and adjusted can be inserted into the internal space through the guide passage. A magnetic field generation apparatus has the magnetic material shims arranged and adjusted using the shim support guide jig, and a magnetic resonance imaging equipment employs the magnetic field generation apparatus. Magnetic field adjustment methods for the magnetic field generation apparatus and for the magnetic resonance imaging equipment are performed using the shim support guide jig.

Abstract: A superconducting magnet device includes a main coil that generates a static magnetic field in an imaging space and a disturbance magnetic field compensation coil that suppresses influences of a variable magnetic field flowing inside from outside in the imaging space. The main coil is divided to at least two diode circuits. The disturbance magnetic field compensation coil has at least one coil formed of minus turns so that mutual inductances with the respective diode circuits in the main coil are made minimum.

Abstract: A superconducting magnet of the present invention includes a switching element that closes its output side (operation side) when the voltage on its input side is smaller than a predetermined value and opens the output side when the voltage on the input side is larger than the predetermined value, wherein the input side is connected in parallel to a main coil circuit, and the output side of is connected in series to external magnetic-field disturbance compensation coils, for releasing the circuit of the disturbance compensation coil by closing the output side if the voltage on the input side is smaller than the predetermined value.

Abstract: A method and a device for identifying an upper surface and a lower surface of a component having asymmetric upper and lower outer shapes are provided. In particular, a method and a device for identifying orientation of an item that hardly allows visual identification of the upper and lower surface. A disk-like, cylindrical, or annular component having asymmetric upper and lower outer shapes is placed on a reference surface having a reference block, an outer peripheral part of the component on the reference surface is brought into contact with the reference block, and identification of the upper and lower surface of the component is achieved in an inline system based on a gap created between the outer peripheral part of the component and the reference block, using a light source lighting device and a detection camera arranged across the reference block.

Abstract: A shim support guide jig includes a shim support guide pipe in which a guide passage for guiding the movement of a shim support is formed. In a state where a superconducting magnet has generated a static magnetic field, the designated shim support can be drawn out from the internal space of the superconducting magnet through the guide passage, and the designated shim support for which magnetic material shims have been arranged and adjusted can be inserted into the internal space through the guide passage. A magnetic field generation apparatus has the magnetic material shims arranged and adjusted using the shim support guide jig, and a magnetic resonance imaging equipment employs the magnetic field generation apparatus. Magnetic field adjustment methods for the magnetic field generation apparatus and for the magnetic resonance imaging equipment are performed using the shim support guide jig.

Abstract: A method and a device for identifying an upper surface and a lower surface of a component having asymmetric upper and lower outer shapes are provided. The components include, for example, disk-like, cylindrical, or annular components, more specifically engine parts having an orientation such as piston rings. In particular, a method and a device for identifying orientation of an item that hardly allows visual identification of the upper and lower surface. A disk-like, cylindrical, or annular component having asymmetric upper and lower outer shapes is placed on a reference surface having a reference block, an outer peripheral part of the component on the reference surface is brought into contact with the reference block, and identification of the upper and lower surface of the component is achieved in an inline system based on a gap created between the outer peripheral part of the component and the reference block, using a light source lighting device and a detection camera arranged across the reference block.

Abstract: A superconducting magnet of the present invention includes a switching element that closes its output side (operation side) when the voltage on its input side is smaller than a predetermined value and opens the output side when the voltage on the input side is larger than the predetermined value, wherein the input side is connected in parallel to a main coil circuit, and the output side of is connected in series to external magnetic-field disturbance compensation coils, for releasing the circuit of the disturbance compensation coil by closing the output side if the voltage on the input side is smaller than the predetermined value.

Abstract: A magnetic resonance imaging system is provided in which the two contradictory requirements, i.e., enhancing the feeling of being not confined by enlarging the subject-insertion space and decreasing magnetomotive force of the superconductive coils by bringing the superconductive coils as close as possible to a subject, can be met in a good balance.

Abstract: A magnetic resonance imaging system is provided in which the two contradictory requirements, i.e., enhancing the feeling of being not confined by enlarging the subject-insertion space and decreasing magnetomotive force of the superconductive coils by bringing the superconductive coils as close as possible to a subject, can be met in a good balance.