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公开(公告)号：US11883683B2
公开(公告)日：2024-01-30
申请号：US17048639
申请日：2019-04-11
发明人： Yusuke Fujii , Ryuya Ando , Manabu Aoki , Kikuo Umegaki , Shinichi Shimizu , Taeko Matsuura , Hiroki Shirato
CPC分类号： A61N5/1039 , A61B5/055 , A61B6/02 , A61N5/1049 , A61N5/1081 , G01R33/421 , G01R33/4215 , A61B5/0035 , A61B6/032 , A61N5/1071 , A61N2005/1055 , A61N2005/1061 , A61N2005/1092 , G01R33/3806 , G01R33/4812
摘要： A particle therapy system includes an accelerator 1 which generates a particle beam for extraction, an irradiation apparatus 21 which irradiates the particle beam to an irradiation target 26, a gantry 18 which rotates together with the irradiation apparatus 21, and an MRI apparatus 50 which rotates together with the gantry 18. The MRI apparatus 50 includes a magnetic circuit composed of an iron core 60 and a plurality of coils 61 serving as a magnetic flux source. The iron core 60 includes two oppositely disposed magnetic poles 63A and 63B, and a return yoke 64 for connecting the magnetic poles 63A and 63B. The magnetic poles 63A, 63B have cavities 65A, 65B. The particle beam passing through the cavity 65A is irradiated to the irradiation target 26.
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公开(公告)号：US08989828B2
公开(公告)日：2015-03-24
申请号：US13899673
申请日：2013-05-22
申请人： Hitachi, Ltd.
发明人： Ryoji Nakagawa , Ryuya Ando , Manabu Aoki
摘要： A superconducting magnet apparatus includes: a bobbin around which a superconducting coil is wound, the bobbin serving as a protective resistor; a persistent current switch for supplying a persistent current to the superconducting coil; a first closed circuit with the superconducting coil and the persistent current switch connected in series to the coil; and a second closed circuit with the superconducting coil and the bobbin connected in series to the coil.
摘要翻译： 一种超导磁体装置，包括：卷绕有超导线圈的线轴，所述线轴用作保护电阻; 用于向超导线圈提供持续电流的持续电流开关; 具有与线圈串联连接的超导线圈和持续电流开关的第一闭合电路; 以及第二闭合电路，其中超导线圈和线圈与线圈串联连接。
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公开(公告)号：US11320504B2
公开(公告)日：2022-05-03
申请号：US17195796
申请日：2021-03-09
申请人： HITACHI, LTD.
IPC分类号： G01R33/385 , G01R33/3875 , G01R33/30 , G01R33/421
摘要： An open-type MRI apparatus includes a pair of static magnetic field magnets and a pair of gradient magnetic field coils. Each static magnetic field magnet includes a discoid magnetic pole configured to generate a static magnetic field in a Z axis direction in which the pair of static magnetic field magnets are opposed each other, and an annular magnetic pole configured to generate a static magnetic field on an X-Y plane perpendicular to the Z axis direction. Each gradient magnetic field coil includes a Z coil configured to provide a magnetic field being gradient in the Z axis direction in the imaging region, a magnetic material block configured to shield the discoid magnetic pole from a magnetic flux generated from the Z coil, and a correction coil configured to shield the annular magnetic pole from the magnetic flux generated from the Z coil.
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公开(公告)号：US10056178B2
公开(公告)日：2018-08-21
申请号：US15111620
申请日：2014-01-27
申请人： Hitachi, Ltd.
发明人： Akihisa Miyazoe , Takeshi Nakayama , Manabu Aoki
IPC分类号： H01F6/00 , G01R33/3815 , H01F6/04 , H01F6/06
CPC分类号： H01F6/008 , F17C2250/0443 , G01R33/3815 , H01F6/04 , H01F6/06
摘要： The superconducting magnet device reduces the number of connections within and/or the number of wires leading out of a superconducting coil winding and promptly starts expending the magnetic energy in a superconducting coil operating in a persistent-current mode when the superconducting coil increases in temperature or transitions to normal conductivity. This invention provides a superconducting magnet device that has the following: a superconducting coil connected to an excitation power supply; a persistent-current switch connected to the superconducting coil; a heater that controls the temperature of the persistent-current switch; a current source that is connected in parallel with the persistent-current switch and has a different polarity from the excitation power supply; a driving circuit connected to the heater and the current source; and a signal-inputting means for inputting a signal to the driving circuit. The driving circuit operates the heater and the current source when the signal is inputted thereto.
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公开(公告)号：US09852831B2
公开(公告)日：2017-12-26
申请号：US15032766
申请日：2013-11-15
申请人： Hitachi, Ltd.
发明人： Akihisa Miyazoe , Takeshi Nakayama , Ryuya Ando , Manabu Aoki
摘要： 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.
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6.发明授权Superconducting electromagnet device, cooling method therefor, and magnetic resonance imaging device 有权超导电磁铁装置及其冷却方法及磁共振成像装置公开(公告)号：US08988176B2
公开(公告)日：2015-03-24
申请号：US14360653
申请日：2012-11-28
申请人： Hitachi, Ltd.
发明人： Manabu Aoki , Ryuya Ando , Yukihiro Murata , Ryoji Nakagawa
IPC分类号： H01F6/00 , H01F6/04 , G01R33/3815
CPC分类号： H01F6/04 , G01R33/3804 , G01R33/3815 , H01F6/02 , Y10S505/844 , Y10S505/85 , Y10S505/879 , Y10S505/893
摘要： A superconducting magnet device is configured to include: a refrigerant circulation flowpath in which a refrigerant (R) circulates; a refrigerator for cooling vapor of the refrigerant (R) in the refrigerant circulation flowpath; a superconducting coil cooled by the circulating refrigerant (R); a protective resistor thermally contacting the superconducting coil and having an internal space (S); a high-boiling-point refrigerant supply section for supplying a high-boiling-point refrigerant having a higher boiling point than the refrigerant (R) and frozen by the refrigerant (R) to the internal space (S) in the protective resistor; and a vacuum insulating container for at least accommodating the refrigerant circulation flowpath, the superconducting coil, and the protective resistor.
摘要翻译： 超导磁体装置构成为包括：制冷剂循环流路，其中制冷剂（R）循环; 用于冷却制冷剂循环流路中的制冷剂（R）的蒸气的冷冻机; 由循环制冷剂（R）冷却的超导线圈; 与所述超导线圈热接触并具有内部空间（S）的保护电阻器; 高沸点制冷剂供给部，用于供给比制冷剂（R）沸点高的高沸点制冷剂，并由制冷剂（R）冻结到保护电阻体内的内部空间（S）; 以及真空绝热容器，用于至少容纳制冷剂循环流路，超导线圈和保护电阻。
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公开(公告)号：US09817051B2
公开(公告)日：2017-11-14
申请号：US15140776
申请日：2016-04-28
申请人： Hitachi, Ltd.
CPC分类号： G01R31/02 , G01R33/1238 , H01L39/00
摘要： An alternating current loss measuring apparatus for superconductors includes a superconductor specimen, a magnetic field applying coil, a radiation shield, a vacuum vessel, first cooling means, and second cooling means. The first cooling means or the second cooling means is provided with a temperature regulating mechanism. The magnetic field applying means and the radiation shield are set to be a first cooling part, whereas the superconductor specimen is set to be a second cooling part, and the first cooling part and the second cooling part are cooled by first and second cooling means, respectively. A high thermal resistance member is disposed between the superconductor specimen and the second cooling means, and temperature measuring means are disposed at at least two positions on the high thermal resistance member. The alternating current loss of a superconductor under an external magnetic field can be measured at each of different temperatures.
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8.发明申请公开(公告)号：US20140329688A1
公开(公告)日：2014-11-06
申请号：US14360653
申请日：2012-11-28
申请人： HITACHI, LTD
发明人： Manabu Aoki , Ryuya Ando , Yukihiro Murata , Ryoji Nakagawa
IPC分类号： H01F6/04 , G01R33/3815
CPC分类号： H01F6/04 , G01R33/3804 , G01R33/3815 , H01F6/02 , Y10S505/844 , Y10S505/85 , Y10S505/879 , Y10S505/893
摘要： A superconducting magnet device is configured to include: a refrigerant circulation flowpath in which a refrigerant (R) circulates; a refrigerator for cooling vapor of the refrigerant (R) in the refrigerant circulation flowpath; a superconducting coil cooled by the circulating refrigerant (R); a protective resistor thermally contacting the superconducting coil and having an internal space (S); a high-boiling-point refrigerant supply section for supplying a high-boiling-point refrigerant having a higher boiling point than the refrigerant (R) and frozen by the refrigerant (R) to the internal space (S) in the protective resistor; and a vacuum insulating container for at least accommodating the refrigerant circulation flowpath, the superconducting coil, and the protective resistor.
摘要翻译： 超导磁体装置构成为包括：制冷剂循环流路，其中制冷剂（R）循环; 用于冷却制冷剂循环流路中的制冷剂（R）的蒸气的冷冻机; 由循环制冷剂（R）冷却的超导线圈; 与所述超导线圈热接触并具有内部空间（S）的保护电阻器; 高沸点制冷剂供给部，用于供给比制冷剂（R）沸点高的高沸点制冷剂，并由制冷剂（R）冻结到保护电阻体内的内部空间（S）; 以及真空绝热容器，用于至少容纳制冷剂循环流路，超导线圈和保护电阻。
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公开(公告)号：US12087467B2
公开(公告)日：2024-09-10
申请号：US17279187
申请日：2019-09-17
申请人： HITACHI, LTD.
发明人： Hideki Tanaka , Takaaki Suzuki , Motomune Kodama , Manabu Aoki
CPC分类号： H01B12/04 , G01R33/34023 , H01F6/06 , H10N60/0856 , H10N60/202
摘要： The present invention addresses a problem of providing an MgB2 wire material having a small reversible bending radius, a superconducting coil using the same, and an MRI without lowering a critical current value and a critical current density of the MgB2 wire material to an extreme. To solve the problem, provided are a superconducting wire having a plurality of MgB2 strands and a first base metal, a superconducting coil using the same, and an MRI, the superconducting wire being characterized in that in a cross section orthogonal to a wire longitudinal direction, a center point of an area surrounded by the plurality of MgB2 strands and a center axis of a cross section of the superconducting wire are disposed in separated positions.
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公开(公告)号：US20160225504A1
公开(公告)日：2016-08-04
申请号：US15002491
申请日：2016-01-21
申请人： HITACHI, LTD.
发明人： Chishin Hori , Manabu Aoki , Akihisa Miyazoe , Yukinobu Imamura
IPC分类号： H01F6/06 , A61B5/055 , G01R33/38 , G01R33/30 , G01R33/3815
CPC分类号： H01F6/06 , A61B5/055 , A61B5/0555 , G01R33/3804 , G01R33/3815 , H01F6/04
摘要： A superconducting magnet in which efficiency of conduction cooling is improved is described as well as a magnetic resonance imaging apparatus that includes the superconducting magnet and requires no liquid helium. The magnet resonance imaging apparatus includes: a coil portion including a winding core, a winding portion formed by winding a wire around the winding core, a first flange provided on one side of the winding core, and a second flange provided on the other side of the winding core; a cooling device for cooling the coil portion; and a heat conducting member for thermally connecting the coil portion and the cooling device, in which at least one of the first flange, the second flange, and the winding core has a region made of a material whose thermal contraction rate is larger than a thermal contraction rate of the winding portion.
摘要翻译： 描述了提高传导冷却效率的超导磁体以及包括超导磁体并且不需要液氦的磁共振成像装置。 磁体共振成像装置包括：线圈部分，其包括绕组芯，通过绕线缠绕线形成的绕组部分，设置在绕组芯的一侧上的第一凸缘和设置在绕组芯的另一侧上的第二凸缘 卷芯; 用于冷却线圈部分的冷却装置; 以及用于热连接线圈部分和冷却装置的导热构件，其中第一凸缘，第二凸缘和卷绕芯中的至少一个具有由热收缩率大于热的材料制成的区域 卷绕部的收缩率。
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