公开(公告)号：US20070096740A1

公开(公告)日：2007-05-03

申请号：US11493819

申请日：2006-07-27

申请人： Yuzo Fukuda ,  Hiromitsu Seino ,  Kazuo Saitoh ,  Hiroyuki Tanaka ,  Tsuyoshi Wakuda ,  Norihide Saho ,  Michiya Okada

发明人： Yuzo Fukuda ,  Hiromitsu Seino ,  Kazuo Saitoh ,  Hiroyuki Tanaka ,  Tsuyoshi Wakuda ,  Norihide Saho ,  Michiya Okada

IPC分类号： G01V3/00

CPC分类号： G01R33/30

摘要： The invention provides a low temperature probe having a high sensitivity by reducing a heat intrusion into a receive coil. A heat making an intrusion into a coil is suppressed by inserting a heat radiation shield in which a temperature is controlled at about 100 K to a portion between an outer container of a probe and a coil portion. A heat radiation shield bore sleeve is provided in a heat radiation bore, is connected to the heat radiation shield, and is cooled by a second heat exchanger. Further, the coil portion is cooled by a first heat exchanger. In preparation for a contraction at a time of being cooled, the outer container, the heat radiation shield and the coil portion are connected by using a fixing portion, and a heat relieving mechanism or a contraction relieving mechanism is provided in a root side (an opposite side to the fixing portion) of the heat radiation shield and the coil portion. The fixing portion is formed in a shape and made of a material having a small heat intrusion amount and having a small heat contraction.

摘要翻译： 本发明通过减少对接收线圈的热侵入来提供具有高灵敏度的低温探针。 通过将温度控制在约100K的热辐射屏蔽物插入到探针的外部容器与线圈部分之间的部分来抑制进入线圈的热量。 热辐射屏蔽孔套筒设置在散热孔中，连接到散热屏蔽，并由第二热交换器冷却。 此外，线圈部分由第一热交换器冷却。 为了准备冷却时的收缩，通过使用固定部连接外容器，散热屏蔽体和线圈部，并且在根侧设置有放热机构或收缩解除机构 热辐射屏蔽体和线圈部分相对于固定部分的相对侧）。 固定部形成为由热侵入量小且热收缩小的材料构成。

公开(公告)号：US06591120B1

公开(公告)日：2003-07-08

申请号：US09555222

申请日：2000-05-26

申请人： Kazuhide Tanaka ,  Michiya Okada ,  Keiji Fukushima ,  Tsuyoshi Wakuda

发明人： Kazuhide Tanaka ,  Michiya Okada ,  Keiji Fukushima ,  Tsuyoshi Wakuda

IPC分类号： H01B1200

CPC分类号： H01L39/143 ,  H01B12/06 ,  Y02E40/642 ,  Y10S505/705 ,  Y10T29/49014

摘要： The cross section of a wire is round and is composed of several units, each consisting of tape-like superconductors laminated in an approximately rhombic shape, which are arranged such that they form a hexagon as a whole. Oxide superconducting tape wires each consisting of a plurality of oxide superconducting filaments are arranged in rotational symmetry to a core. The oxide superconducting filaments have the cross section such that the average thickness is 3 to 20 &mgr;m and the average aspect ratio is larger than 2 and smaller than 10. A step of arranging the oxide superconducting tape-like wires in rotational symmetry is accomplished when the multi-core tape-like wires are packed in a third metal pipe which becomes a metal sheath later. Since the multi-core tape wires having oxide superconducting filaments are arranged in rotational symmetry, the oxide superconductor in the oxide superconducting filaments permits its c axis to orient in various directions. This makes it possible to prevent the critical current from decreasing irrespective of the direction in which the magnetic field is applied and to increase the critical current density (Jc) because the oxide superconducting filament has an optimal size. The oxide superconductor should be a bismuth-based oxide superconductor, preferably be the one which has a composition of Bi2Sr2Ca1Cu2Ox.

摘要翻译： 线的横截面是圆形的，并且由几个单元组成，每个单元由以大致菱形形式叠层的带状超导体组成，它们整体形成六边形。 每个由多个氧化物超导细丝组成的氧化物超导带线布置成与芯部旋转对称。 氧化物超导细丝具有平均厚度为3-20μm，平均纵横比大于2且小于10的横截面。当将氧化物超导带状导线布置成旋转对称的步骤是在 多芯带状电线被包装在稍后成为金属护套的第三金属管中。 由于具有氧化物超导细丝的多芯带线布置成旋转对称，所以氧化物超导细丝中的氧化物超导体允许其c轴在各个方向上取向。 这使得可以防止临界电流随着施加磁场的方向而降低，并且由于氧化物超导细丝具有最佳尺寸而增加临界电流密度（Jc）。 氧化物超导体应为铋基氧化物超导体，优选为具有Bi 2 Sr 2 Ca 1 Cu 2 x x x的组成的超导体。

公开(公告)号：US07358736B2

公开(公告)日：2008-04-15

申请号：US11493819

申请日：2006-07-27

申请人： Yuzo Fukuda ,  Hiromitsu Seino ,  Kazuo Saitoh ,  Hiroyuki Tanaka ,  Tsuyoshi Wakuda ,  Norihide Saho ,  Michiya Okada

发明人： Yuzo Fukuda ,  Hiromitsu Seino ,  Kazuo Saitoh ,  Hiroyuki Tanaka ,  Tsuyoshi Wakuda ,  Norihide Saho ,  Michiya Okada

IPC分类号： G01V3/00

CPC分类号： G01R33/30

摘要： The invention provides a low temperature probe having a high sensitivity by reducing a heat intrusion into a receive coil. A heat making an intrusion into a coil is suppressed by inserting a heat radiation shield in which a temperature is controlled at about 100 K to a portion between an outer container of a probe and a coil portion. A heat radiation shield bore sleeve is provided in a heat radiation bore, is connected to the heat radiation shield, and is cooled by a second heat exchanger. Further, the coil portion is cooled by a first heat exchanger. In preparation for a contraction at a time of being cooled, the outer container, the heat radiation shield and the coil portion are connected by using a fixing portion, and a heat relieving mechanism or a contraction relieving mechanism is provided in a root side (an opposite side to the fixing portion) of the heat radiation shield and the coil portion. The fixing portion is formed in a shape and made of a material having a small heat intrusion amount and having a small heat contraction.

摘要翻译： 本发明通过减少对接收线圈的热侵入来提供具有高灵敏度的低温探针。 通过将温度控制在约100K的热辐射屏蔽物插入到探针的外部容器与线圈部分之间的部分来抑制进入线圈的热量。 热辐射屏蔽孔套筒设置在散热孔中，连接到散热屏蔽，并由第二热交换器冷却。 此外，线圈部分由第一热交换器冷却。 为了准备冷却时的收缩，通过使用固定部连接外容器，散热屏蔽体和线圈部，并且在根侧设置有放热机构或收缩解除机构 热辐射屏蔽体和线圈部分相对于固定部分的相对侧）。 固定部形成为由热侵入量小且热收缩小的材料构成。

公开(公告)号：US20060033498A1

公开(公告)日：2006-02-16

申请号：US11196279

申请日：2005-08-04

申请人： Kazuo Saitoh ,  Haruhiro Hasegawa ,  Hiroyuki Yamamoto ,  Hisaaki Ochi ,  Tsuyoshi Wakuda ,  Michiya Okada

发明人： Kazuo Saitoh ,  Haruhiro Hasegawa ,  Hiroyuki Yamamoto ,  Hisaaki Ochi ,  Tsuyoshi Wakuda ,  Michiya Okada

IPC分类号： G01V3/00

CPC分类号： G01R33/34053 ,  G01R33/34007 ,  G01R33/34023 ,  G01R33/34069 ,  G01R33/34092

摘要： A configuration of an NMR apparatus is provided. In the NMR apparatus, a magnetic field space of higher uniformity is generated by split superconducting magnets. At the same time, it is provided with a cryo probe excellent in cooling capability and sensitivity between two superconducting solenoid coils constructed in very close proximity to each other. For this purpose, a probe coil provided between the two superconducting solenoid coils is so constructed that the following is implemented: a certain distance is ensured between a substrate with a coil formed thereon and another, and the substrates and spacer substrates for cooling are alternately laminated. The spacer substrates are cooled by a cold head of sapphire. When the probe coil is inserted in the same direction as a sample tube (direction perpendicular to the static magnetic field), the spacer substrates cannot be coupled directly by the cold head of sapphire. Therefore, they are cooled through a fixed substrate for thermal conduction of sapphire coupled with the cold head.

摘要翻译： 提供了NMR装置的结构。 在NMR装置中，通过分体超导磁体产生更高均匀性的磁场空间。 同时，它提供了一种低温探针，该低温探针具有非常接近的两个超导螺线管线圈之间的冷却能力和灵敏度。 为此，设置在两个超导螺线管线圈之间的探针线圈被构造成使得实现以下功能：在其上形成有线圈的基板和另一个之间确保一定距离，并且用于冷却的基板和间隔基板交替层压 。 间隔基板被蓝宝石的冷头冷却。 当探针线圈沿着与样品管相同的方向（垂直于静磁场的方向）插入时，间隔基板不能由蓝宝石的冷头直接耦合。 因此，它们通过固定的基板进行冷却，用于与冷头连接的蓝宝石的热传导。

公开(公告)号：US06909347B2

公开(公告)日：2005-06-21

申请号：US10316827

申请日：2002-12-12

申请人： Tsuyoshi Wakuda ,  Michiya Okada ,  Shigeru Kakugawa ,  Hiroyuki Watanabe

发明人： Tsuyoshi Wakuda ,  Michiya Okada ,  Shigeru Kakugawa ,  Hiroyuki Watanabe

IPC分类号： G01R33/3815 ,  A61B5/055 ,  G01R33/38 ,  G01R33/421 ,  H01F6/00 ,  H01F6/04 ,  H01F1/00

CPC分类号： G01R33/421 ,  G01R33/3806

摘要： A magnet for MRI apparatus has a magnetic circuit which includes a magnetic flux path formed by a ferromagnetic material and a magnetic flux path formed by magnetic flux return coils or magnetic flux control coils, so that a 5-gauss line of leakage fluxes can be kept within a sphere 3 m in radius even when the static magnetic field intensity exceeds 1 tesla and a comparatively light magnet for MRI apparatus can be provided. Further, the fluxes escaping vertically from the static magnetic field sources are led compactly to a horizontal direction by installing magnetic flux paths of ferromagnetic materials and coils with polarities opposing those of the static magnetic fields. This arrangement minimizes an increase in the total height of the magnet for MRI apparatus, keeping the magnet within the total height of 3 m.

摘要翻译： 用于MRI装置的磁体具有磁路，其包括由铁磁材料形成的磁通路径和由磁通量返回线圈或磁通量控制线圈形成的磁通路径，从而可以保持5高斯线的漏磁通 即使静磁场强度超过1特斯拉，也可以设置3μm以上的球面，能够提供比较轻的MRI用磁铁。 此外，通过安装具有与静磁场的极性相反的极性的铁磁材料和线圈的磁通路径，将从静态磁场源垂直逃逸的磁通紧紧地引导到水平方向。 这种布置使得用于MRI装置的磁体的总高度增加最小化，从而将磁体保持在3m的总高度内。

公开(公告)号：US07049913B2

公开(公告)日：2006-05-23

申请号：US10786012

申请日：2004-02-26

申请人： Tsuyoshi Wakuda ,  Kohji Maki ,  Mitsuyoshi Tsuchiya ,  Michiya Okada ,  Hideo Tsukamoto ,  Souji Kajiura ,  Shuichi Kido

发明人： Tsuyoshi Wakuda ,  Kohji Maki ,  Mitsuyoshi Tsuchiya ,  Michiya Okada ,  Hideo Tsukamoto ,  Souji Kajiura ,  Shuichi Kido

IPC分类号： H01F7/00

CPC分类号： H01F6/00 ,  H01F6/06

摘要： The present invention provides a superconductivity magnet apparatus for generating a uniform magnetic field suitable for NMR applications. The superconductivity magnet apparatus has an access port for allowing an access to the center of the magnetic field from an external position separated away from the center in a direction other than the axial direction of a split-type superconductivity electromagnet employed in the magnet apparatus. In the superconductivity magnet apparatus, a gap exists between first and second superconductivity coil blocks facing each other to form the split-type superconductivity electromagnet. To put it in detail, the access port allows an access to a measurement space at the center of the magnet by way of the gap. A configuration element of the magnet such as a coil bobbin is cut out for providing the access port. An area including a deficiency portion caused by the cutout portion or the like is filled up with a material having a relative magnetic permeability in the range 1.000 to 1.002 as an axis-symmetrical area. By using the material with a relative magnetic permeability in the range 1.000 to 1.002, the strength of an erroneously generated magnetic field can be reduced so that a magnet producing a uniform magnetic field can be provided.

摘要翻译： 本发明提供一种用于产生适用于NMR应用的均匀磁场的超导磁体装置。 超导磁体装置具有用于允许从除了在磁体装置中使用的分型超导电磁体的轴向以外的方向从中心离开的外部位置进入磁场的中心的进入口。 在超导磁体装置中，在彼此相对的第一和第二超导线圈块之间存在间隙，形成分体型超导电磁体。 要详细说明，访问端口允许通过间隙访问磁体中心处的测量空间。 为了提供接入口，切断了诸如线圈骨架的磁体的配置元件。 由切口部等引起的包括缺陷部的区域被填充有相对磁导率在1.000〜1.002的范围内的材料作为轴对称区域。 通过使用相对磁导率在1.000〜1.002的范围内的材料，可以减小误产生的磁场的强度，从而可以提供产生均匀磁场的磁体。

公开(公告)号：US20080284470A1

公开(公告)日：2008-11-20

申请号：US12120385

申请日：2008-05-14

申请人： Minseok Park ,  Michiya Okada ,  Shuya Hagiwara ,  Hideki Tanaka

发明人： Minseok Park ,  Michiya Okada ,  Shuya Hagiwara ,  Hideki Tanaka

IPC分类号： H03B21/00 ,  G01V3/14

CPC分类号： G01R33/3607

摘要： A DDS (direct digital synthesizer) remarkably increased in the number of frequencies which can be output while maintaining the phase coherency, and an NMR instrument using such a DDS are provided. A DDS including phase accumulators and a phase-to-amplitude modulator is provided with a plurality of phase accumulators operating with fixed phase implements which are equal to powers of 2, a controller for outputting each bit of a frequency tuning word as control data, a plurality of switches for outputting an output of an associated one of the phase accumulators when an associated one of the control data supplied from the controller is 1 and outputting 0 when the associated one of the control data is 0, and an adder for adding up outputs of the switches.

摘要翻译： DDS（直接数字合成器）在保持相位一致性的同时可以输出的频率数量显着增加，并且提供使用这种DDS的NMR仪器。 包括相位累加器和相位到幅度调制器的DDS设置有多个相位累加器，其以等于2的功率的固定相位工具操作;控制器，用于输出频率调谐字的每个位作为控制数据; 多个开关，用于当从所述控制器提供的所述控制数据中的相关一个之一输出相关联的一个所述相位累加器的输出，并且当所述控制数据中的相关一个为0时输出0;以及加法器， 的开关。

公开(公告)号：US08239433B2

公开(公告)日：2012-08-07

申请号：US12120385

申请日：2008-05-14

申请人： Minseok Park ,  Michiya Okada ,  Shuya Hagiwara ,  Hideki Tanaka

发明人： Minseok Park ,  Michiya Okada ,  Shuya Hagiwara ,  Hideki Tanaka

IPC分类号： G06F1/02

CPC分类号： G01R33/3607

摘要： A DDS (direct digital synthesizer) remarkably increased in the number of frequencies which can be output while maintaining the phase coherency, and an NMR instrument using such a DDS are provided. A DDS including phase accumulators and a phase-to-amplitude modulator is provided with a plurality of phase accumulators operating with fixed phase implements which are equal to powers of 2, a controller for outputting each bit of a frequency tuning word as control data, a plurality of switches for outputting an output of an associated one of the phase accumulators when an associated one of the control data supplied from the controller is 1 and outputting 0 when the associated one of the control data is 0, and an adder for adding up outputs of the switches.

摘要翻译： DDS（直接数字合成器）在保持相位一致性的同时可以输出的频率数量显着增加，并且提供使用这种DDS的NMR仪器。 包括相位累加器和相位到幅度调制器的DDS设置有多个相位累加器，其以等于2的功率的固定相位工具操作;控制器，用于输出频率调谐字的每个位作为控制数据; 多个开关，用于当从所述控制器提供的所述控制数据中的相关一个之一输出相关联的一个所述相位累加器的输出，并且当所述控制数据中的相关一个为0时输出0;以及加法器， 的开关。

公开(公告)号：US06967482B2

公开(公告)日：2005-11-22

申请号：US10383655

申请日：2003-03-10

申请人： Hiroshi Morita ,  Michiya Okada ,  Katsuzou Aihara

发明人： Hiroshi Morita ,  Michiya Okada ,  Katsuzou Aihara

IPC分类号： H01F6/00 ,  G01R33/34 ,  G01V3/00 ,  H01F6/06

CPC分类号： G01R33/34053 ,  G01R33/34023 ,  G01R33/34069 ,  G01R33/34092 ,  H01F6/06

摘要： To provide a probe coil for an NMR apparatus which can transmit and receive high frequency radio waves with improved Q-factor and S/N ratio. As a measure, the probe coil for an NMR apparatus is provided as of a solenoid type formed of magnesium diboride superconductor. As another measure, the probe coil for an NMR apparatus has a plurality of coils using magnesium diboride superconductors connected in series. As further another measure, there is used a magnesium diboride superconductor mixed with metal. As still further another measure, the probe coil for an NMR apparatus is formed by using a single metal selected from gold, silver, copper, aluminum, iron, platinum, palladium, nickel, stainless steel, chromium, magnesium, tantalum, niobium, titanium, zinc, beryllium, tungsten, or cobalt, or an alloy including a plurality thereof.

摘要翻译： 提供一种能够以改善的Q因子和S / N比发送和接收高频无线电波的NMR装置的探针线圈。 作为测量，用于NMR装置的探针线圈以由二硼化镁超导体形成的螺线管形式提供。 作为另一个措施，用于NMR装置的探针线圈具有使用串联连接的二硼化硼超导体的多个线圈。 作为另一个措施，使用与金属混合的二硼化镁超导体。 作为另一种措施，NMR装置的探针线圈通过使用选自金，银，铜，铝，铁，铂，钯，镍，不锈钢，铬，镁，钽，铌，钛的单一金属形成 ，锌，铍，钨或钴，或包含多个的合​​金。

公开(公告)号：US07126335B2

公开(公告)日：2006-10-24

申请号：US11253574

申请日：2005-10-20

申请人： Hiroshi Morita ,  Michiya Okada ,  Masae Kiryu ,  Hiromitsu Seino

发明人： Hiroshi Morita ,  Michiya Okada ,  Masae Kiryu ,  Hiromitsu Seino

IPC分类号： G01V3/00

CPC分类号： G01R33/31

摘要： A nuclear magnetic resonance measuring apparatus includes an NMR probe head equipped with an NMR receiver coil and an irradiation coil, a preamplifier, for amplifying the NMR signal received by the NMR receiver coil, a coil cooling heat exchanger, for exchanging heat between the NMR receiver coil/irradiation coil and coolant, a preamplifier heat exchanger for exchanging heat between the preamplifier and the coolant, and a cooling device capable of cooling and compressing the coolant. Further, a first transfer tube is provided for transferring the coolant from the cooling device to the probe head, a second transfer tube for transferring the coolant from the probe head to the cooling device, a third transfer tube for transferring the coolant from the cooling device to the probe head, and a fourth transfer tube for transferring the coolant from the probe head to the cooling device.