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1.发明授权公开(公告)号：US07026901B2
公开(公告)日：2006-04-11
申请号：US10066680
申请日：2002-02-06
申请人： Yousuke Yanagi , Tetsuo Oka , Yoshitaka Itoh , Masaaki Yoshikawa
发明人： Yousuke Yanagi , Tetsuo Oka , Yoshitaka Itoh , Masaaki Yoshikawa
IPC分类号： H01F7/00
CPC分类号： H01F13/00 , F25B9/14 , F25D19/006 , H01F6/008
摘要： A cold head is disposed in an insulating container and cooled by a refrigerator. A superconductor is disposed in the insulating container, contacting the cold head, and is cooled to its superconduction transition temperature or lower by heat conduction. A magnetizing coil is disposed outside the insulating container for applying a magnetic field to the superconductor. Control is performed so that a magnetic field determined considering the magnetic field to be captured by the superconductor is applied. A pulsed magnetic field is applied to the superconductor a plurality of times. Each pulsed magnetic field is applied when the temperature of the superconductor is a predetermined temperature or lower. A maximum pulsed magnetic field is applied at least once in an initial or intermediate stage of the repeated application of pulsed magnetic fields. After that, a pulsed magnetic field equal to or less than the maximum pulsed magnetic field is applied. Pulsed magnetic fields are repeatedly applied while the temperature of the superconductor is lowered. A pulsed magnetic field is applied when the temperature T0 of a central portion of the superconductor is the superconduction transition temperature or lower and the temperature of a peripheral portion is higher than T0. The temperature of the entire superconductor is brought close to T0 to apply another pulsed magnetic field. The magnetizing coil faces at least one of two opposite sides of the superconductor to apply pulsed magnetic fields to the superconductor in its magnetization direction.
摘要翻译： 将冷头设置在绝热容器中并用冰箱冷却。 超导体设置在绝热容器中，与冷头接触，并通过热传导而冷却至其超导转变温度或更低。 磁化线圈设置在绝缘容器的外部，用于向超导体施加磁场。 执行控制，使得考虑要由超导体捕获的磁场确定的磁场被施加。 将脉冲磁场多次施加到超导体。 当超导体的温度为预定温度或更低时，施加每个脉冲磁场。 在重复施加脉冲磁场的初始阶段或中间阶段，最大脉冲磁场施加至少一次。 之后，施加等于或小于最大脉冲磁场的脉冲磁场。 当超导体的温度降低时，脉冲磁场被重复施加。 当超导体的中心部分的温度T 0 <0>超导转变温度以下且周边部分的温度高于T 0 0 。 整个超导体的温度接近T 0 0以施加另一个脉冲磁场。 磁化线圈面向超导体的两个相对侧中的至少一个，以在其磁化方向上向超导体施加脉冲磁场。
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公开(公告)号：US6111490A
公开(公告)日：2000-08-29
申请号：US879040
申请日：1997-06-19
申请人： Yousuke Yanagi , Tetsuo Oka , Yoshitaka Itoh , Masaaki Yoshikawa
发明人： Yousuke Yanagi , Tetsuo Oka , Yoshitaka Itoh , Masaaki Yoshikawa
CPC分类号： H01F13/00 , F25B9/14 , F25D19/006 , H01F6/008
摘要： A cold head is disposed in an insulating container and cooled by a refrigerator. A superconductor is disposed in the insulating container, contacting the cold head, and is cooled to its superconduction transition temperature or lower by heat conduction. A magnetizing coil is disposed outside the insulating container for applying a magnetic field to the superconductor. Control is performed so that a magnetic field determined considering the magnetic field to be captured by the superconductor is applied. A pulsed magnetic field is applied to the superconductor a plurality of times. Each pulsed magnetic field is applied when the temperature of the superconductor is a predetermined temperature or lower. A maximum pulsed magnetic field is applied at least once in an initial or intermediate stage of the repeated application of pulsed magnetic fields. After that, a pulsed magnetic field equal to or less than the maximum pulsed magnetic field is applied. Pulsed magnetic fields are repeatedly applied while the temperature of the superconductor is lowered. A pulsed magnetic field is applied when the temperature T.sub.0 of a central portion of the superconductor is the superconduction transition temperature or lower and the temperature of a peripheral portion is higher than T.sub.0. The temperature of the entire superconductor is brought close to T.sub.0 to apply another pulsed magnetic field. The magnetizing coil faces at least one of two opposite sides of the superconductor to apply pulsed magnetic fields to the superconductor in its magnetization direction.
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3.发明授权
公开(公告)号：US5981442A
公开(公告)日：1999-11-09
申请号：US151807
申请日：1998-09-14
申请人： Yousuke Yanagi , Takeo Yamazaki , Atsushi Takagi , Yuh Yamada , Uichiro Mizutani , Yoshitaka Itoh , Masaaki Yoshikawa , Tetsuo Oka
发明人： Yousuke Yanagi , Takeo Yamazaki , Atsushi Takagi , Yuh Yamada , Uichiro Mizutani , Yoshitaka Itoh , Masaaki Yoshikawa , Tetsuo Oka
CPC分类号： C04B35/4508 , H01L39/126 , Y10S505/785
摘要： An Nd-Ba-Cu-O bulk superconductor includes oxide including metallic elements of neodymium (Nd), barium (Ba) and copper (Cu), and has a structure in which fine particles of Nd.sub.4 Ba.sub.2 Cu.sub.2 O.sub.10 (i.e., Nd422) are dispersed uniformly in crystalline grains of NdBa.sub.2 Cu.sub.3 O.sub.x (i.e., Nd123). It is produced by preparing a mixture powder in which an Nd123 powder and an Nd422 powder are present uniformly, thermally treating the mixture powder in a temperature range where the Nd123 powder melts partially at least but the Nd422 powder hardly melts, and gradually cooling the partially melted mixture powder in a temperature range around a solidifying point of the Nd123 powder. It exhibits an enhanced magnetic-field-trapping capability in the regions of low magnetic field, because of the pinning effect resulting from the fine particles of Nd422 dispersed uniformly in the crystalline grains of Nd123.
摘要翻译： Nd-Ba-Cu-O体超导体包括含有钕（Nd），钡（Ba）和铜（Cu）的金属元素的氧化物，并且具有Nd4Ba2Cu2O10（即Nd422）的细颗粒均匀分散的结构 NdBa2Cu3Ox晶粒（即Nd123）。 通过制备其中Nd123粉末和Nd422粉末均匀存在的混合粉末制备，在Nd123粉末至少部分熔融但Nd422粉末几乎不熔化的温度范围内对混合粉末进行热处理，并逐渐冷却部分 在Nd123粉末的凝固点附近的温度范围内熔融混合物粉末。 由于Nd422的细颗粒均匀分散在Nd123的晶粒中，所以在低磁场区域具有增强的磁场捕获能力。
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4.发明授权公开(公告)号：US06441710B1
公开(公告)日：2002-08-27
申请号：US09586956
申请日：2000-06-05
申请人： Yousuke Yanagi , Tetsuo Oka , Yoshitaka Itoh , Masaaki Yoshikawa
发明人： Yousuke Yanagi , Tetsuo Oka , Yoshitaka Itoh , Masaaki Yoshikawa
IPC分类号： H01F2724
CPC分类号： H01F13/00 , F25B9/14 , F25D19/006 , H01F6/008
摘要： A cold head is disposed in an insulating container and cooled by a refrigerator. A superconductor is disposed in the insulating container, contacting the cold head, and is cooled to its superconduction transition temperature or lower by heat conduction. A magnetizing coil is disposed outside the insulating container for applying a magnetic field to the superconductor. Control is performed so that a magnetic field determined considering the magnetic field to be captured by the superconductor is applied. A pulsed magnetic field is applied to the superconductor a plurality of times. Each pulsed magnetic field is applied when the temperature of the superconductor is a predetermined temperature or lower. A maximum pulsed magnetic field is applied at least once in an initial or intermediate stage of the repeated application of pulsed magnetic fields. After that, a pulsed magnetic field equal to or less than the maximum pulsed magnetic field is applied. Pulsed magnetic fields are repeatedly applied while the temperature of the superconductor is lowered. A pulsed magnetic field is applied when the temperature To of a central portion of the superconductor is the superconduction transition temperature or lower and the temperature of a peripheral portion is higher than T0. The temperature of the entire superconductor is brought close to T0 to apply another pulsed magnetic field. The magnetizing coil faces at least one of two opposite sides of the superconductor to apply pulsed magnetic fields to the superconductor in its magnetization direction.
摘要翻译： 将冷头设置在绝热容器中并用冰箱冷却。 超导体设置在绝热容器中，与冷头接触，并通过热传导而冷却至其超导转变温度或更低。 磁化线圈设置在绝缘容器的外部，用于向超导体施加磁场。 执行控制，使得考虑要由超导体捕获的磁场确定的磁场被施加。 将脉冲磁场多次施加到超导体。 当超导体的温度为预定温度或更低时，施加每个脉冲磁场。 在重复施加脉冲磁场的初始阶段或中间阶段，最大脉冲磁场施加至少一次。 之后，施加等于或小于最大脉冲磁场的脉冲磁场。 当超导体的温度降低时，脉冲磁场被重复施加。 当超导体的中心部分的温度To为超导转变温度或更低，周边部分的温度高于T0时，施加脉冲磁场。 整个超导体的温度接近于T0，以施加另一个脉冲磁场。 磁化线圈面向超导体的两个相对侧中的至少一个，以在其磁化方向上向超导体施加脉冲磁场。
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公开(公告)号：US06489769B2
公开(公告)日：2002-12-03
申请号：US09888526
申请日：2001-06-26
申请人： Takashi Nakamura , Jun Uzawa , Tetsuo Oka , Yoshitaka Ito , Yousuke Yanagi , Masaaki Yoshikawa , Ryohei Yabuno , Uichiro Mizutani
发明人： Takashi Nakamura , Jun Uzawa , Tetsuo Oka , Yoshitaka Ito , Yousuke Yanagi , Masaaki Yoshikawa , Ryohei Yabuno , Uichiro Mizutani
IPC分类号： G01V300
CPC分类号： G01R33/3815
摘要： A nuclear magnetic resonance apparatus including: a cup-shaped high-temperature superconductor 20 having a hollow cylindrical shape or portion cooled to not more than a superconducting transition temperature in a vacuum insulating container 22; and a detection coil 12 for detecting an NMR signal of a material 11 to be measured inserted into the hollow cylindrical portion 20a of the high-temperature superconductor. The high-temperature superconductor is magnetized in an axial direction, a static magnetic field is thereby generated in the hollow cylindrical portion in a cylinder axial direction, and the NMR signal of a material is detected by the detection coil and the existing spectrometer. A strong static magnetic field comparable to a conventional superconducting magnet is formed without using a refrigerant (liquid helium) essential for operating the conventional superconducting magnet, and a strength distribution of the static magnetic field is homogeneous.
摘要翻译： 一种核磁共振装置，包括：在真空绝热容器22中具有中空圆筒形状或冷却至不超过超导转变温度的部分的杯状高温超导体20; 以及检测线圈12，用于检测被插入到高温超导体的中空圆筒部20a中的待测材料11的NMR信号。 高温超导体在轴向上被磁化，因此在中空圆柱形部分中在气缸轴向方向上产生静态磁场，并且通过检测线圈和现有的光谱仪检测材料的NMR信号。 形成与传统超导磁体相当的强静态磁场，而不使用用于操作常规超导磁体所必需的制冷剂（液氦），并且静磁场的强度分布是均匀的。
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6.发明授权公开(公告)号：US06545474B2
公开(公告)日：2003-04-08
申请号：US09888538
申请日：2001-06-26
申请人： Takashi Nakamura , Jun Uzawa , Tetsuo Oka , Yoshitaka Ito , Yousuke Yanagi , Masaaki Yoshikawa , Ryohei Yabuno
发明人： Takashi Nakamura , Jun Uzawa , Tetsuo Oka , Yoshitaka Ito , Yousuke Yanagi , Masaaki Yoshikawa , Ryohei Yabuno
IPC分类号： G01V300
CPC分类号： G01R33/3815
摘要： A controlling method for a nuclear magnetic resonance apparatus. The method includes: (A) cooling the high-temperature superconductor at a magnetization low temperature sufficiently lower than a superconductor transition temperature, and magnetizing the high-temperature superconductor with a magnetic field; (B) raising the temperature of the high-temperature superconductor at a magnetic flux setting temperature higher than the magnetization low temperature and lower than the superconductor transition temperature and setting a predetermined magnetic flux density; and (C) controlling the high-temperature superconductor in an operation temperature range lower than the magnetic flux setting temperature. Therefore, a strong static magnetic field comparable to a conventional superconducting magnet is formed without using a refrigerant (liquid helium) essential for operating the conventional superconducting magnet, and a magnetic flux density of the static magnetic field is held constant.
摘要翻译： 一种用于核磁共振装置的控制方法。 该方法包括：（A）以足够低于超导体转变温度的磁化低温冷却高温超导体，并用磁场磁化高温超导体; （B）在比磁化低温高且低于超导体转变温度的磁通量设定温度下升高高温超导体的温度，设定规定的磁通密度; 和（C）在低于磁通量设定温度的操作温度范围内控制高温超导体。 因此，与传统的超导磁体相当的强静态磁场形成，而不使用用于操作常规超导磁体所必需的制冷剂（液氦），并且静磁场的磁通密度保持恒定。
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公开(公告)号：US06169402A
公开(公告)日：2001-01-02
申请号：US09257192
申请日：1999-02-25
申请人： Tetsuo Oka , Yoshitaka Ito , Yousuke Yanagi , Masaaki Yoshikawa , Ryohei Yabuno , Jun Uzawa
发明人： Tetsuo Oka , Yoshitaka Ito , Yousuke Yanagi , Masaaki Yoshikawa , Ryohei Yabuno , Jun Uzawa
IPC分类号： G01V300
CPC分类号： G01R33/3815 , F25B9/145 , F25B2400/06
摘要： A magnet for producing a static magnetic field is improved, and a small-sized, high-resolution nuclear magnetic resonance system is provided. A superconductive bulk (17) of a high-temperature superconductor is cooled in a vacuum insulated container (16), and magnetized with a magnetizing coil (19). This is used for analyzing a subject (11).
摘要翻译： 用于产生静磁场的磁体得到改善，并且提供了小尺寸的高分辨率核磁共振系统。 在真空绝热容器（16）中冷却高温超导体的超导体（17），并用磁化线圈（19）进行磁化。 这用于分析主题（11）。
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公开(公告)号：US06847278B2
公开(公告)日：2005-01-25
申请号：US10097005
申请日：2002-03-14
申请人： Yoshitaka Ito , Masaaki Yoshikawa , Yousuke Yanagi , Tetsuo Oka
发明人： Yoshitaka Ito , Masaaki Yoshikawa , Yousuke Yanagi , Tetsuo Oka
CPC分类号： H01F6/00
摘要： A magnetic device which is highly durable, reliable, and safe without being damaged when a magnetic filed is applied. The magnetic device includes a cooling device having a cold head refrigerated by an effect of a cryogenic refrigerator, a magnetic field generation device configured to apply a non-stationary magnetic field on a magnetic body, and a cold head extension portion configured to thermally connect the magnetic body and the cold head. The cold head extension portion includes at least two members, one a low resistance member and the other a high resistance member having different resistivities. With this device, the eddy current generated in the cold head extension portion and the electromagnetic force produced in the cold head by the cold head extension portion are reduced.
摘要翻译： 一种磁性装置，其耐久性，可靠性和安全性，而不会在施加磁场时被损坏。 该磁性装置包括一冷却装置，该冷却装置具有通过低温冰箱的作用而冷藏的冷头，被配置为将磁场上施加非固定磁场的磁场产生装置和冷头扩展部， 磁体和冷头。 冷头延伸部分包括至少两个构件，一个是低阻力构件，另一个是具有不同电阻率的高阻力构件。 利用该装置，冷头延伸部产生的涡电流和由冷头延伸部在冷头中产生的电磁力减小。
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9.发明授权Superconducting magnet device, magnetizing device and method for superconductor 失效超导磁体装置，超导体的磁化装置及方法
公开(公告)号：US5659278A
公开(公告)日：1997-08-19
申请号：US369333
申请日：1995-01-06
申请人： Yousuke Yanagi , Shintaro Harada , Ryohei Yabuno , Tetsuo Oka , Yoshitaka Ito , Tutomu Sakakibara
发明人： Yousuke Yanagi , Shintaro Harada , Ryohei Yabuno , Tetsuo Oka , Yoshitaka Ito , Tutomu Sakakibara
CPC分类号： H01F6/008 , Y10S505/879
摘要： A superconducting magnet device and magnetizing device for superconductor including a coil provided around the superconductor; a current supply line connected to the coil and a power source and supplying a pulse current from the power source to the coil; and a refrigerant container controlled to a superconducting transition temperature or below, the coil arranged in the refrigerant container, the current supply line provided within refrigerant pipes connecting to the refrigerant container, its applied instrument, and a magnetizing method for superconductor including cooling the interior of the refrigerant container down to the superconducting transition temperature or below; supplying a pulse current to the coil for generating a magnetic field by the coil; and magnetizing the superconductor.
摘要翻译： 一种用于超导体的超导磁体装置和磁化装置，包括设置在超导体周围的线圈; 连接到所述线圈的电源线和电源，并且将来自所述电源的脉冲电流提供给所述线圈; 以及控制在超导转变温度以下的制冷剂容器，布置在制冷剂容器中的线圈，设置在与制冷剂容器连接的制冷剂管内的电流线，其应用器具和用于超导体的磁化方法，包括冷却内部 制冷剂容器下降到超导转变温度以下; 向所述线圈供给脉冲电流以产生由所述线圈产生的磁场; 并磁化超导体。
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公开(公告)号：US5581135A
公开(公告)日：1996-12-03
申请号：US304214
申请日：1994-09-12
申请人： Yoshitaka Ito , Yousuke Yanagi , Tetsuo Oka , Ryohei Yabuno , Shintaro Harada , Tutomu Sakakibara
发明人： Yoshitaka Ito , Yousuke Yanagi , Tetsuo Oka , Ryohei Yabuno , Shintaro Harada , Tutomu Sakakibara
摘要： A superconducting motor comprising an armature provided on a ro tative shaft, magnet portions disposed opposite to said armature, coolant containers for containing said magnet portions and coolant, coolant pipes connected to said coolant containers for supplying the coolant, wherein each of said magnet portions comprises a superconductor and a magnetizing coil wound around it and wherein lead wires for supplying a pulse current for magnetization are connected to said magnetizing coils.
摘要翻译： 一种超导电动机，其包括设置在旋转轴上的电枢，与所述电枢相对设置的磁体部分，用于容纳所述磁体部分和冷却剂的冷却剂容器，连接到所述冷却剂容器用于供应冷却剂的冷却剂管，其中每个所述磁体部分包括 超导体和缠绕在其上的磁化线圈，并且其中用于提供用于磁化的脉冲电流的引线连接到所述磁化线圈。
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