首页 / 国际专利分类库 / 电学 / 基本电气元件 / 磁体;电感;变压器;磁性材料的选择 / 超导磁体;超导线圈{(使用超导线圈的磁共振组件入G01R33/3815)}
序号 专利名 申请号 申请日 公开(公告)号 公开(公告)日 发明人
141 Support member for a superconducting magnet assembly US10707073 2003-11-19 US06933817B2 2005-08-23 David George Reeves
A superconducting magnet assembly is described wherein the magnet cartridge is suspended within the vacuum chamber by a single support member extending from a wall of the vacuum chamber to the magnet cartridge. In one aspect, the support member includes a support tube and a joint attached to an end of the support tube. The joint is attached to the wall of the outer vacuum chamber, and provides at least one degree of freedom to the support tube relative to the wall. In another aspect, a joint is attached to an opposite end of the support tube, and is attached to the magnet cartridge for providing at least one degree of freedom to the support tube relative to the magnet cartridge. In another aspect, the support is constructed from one or more sections and the material choice is governed by the requirements for strength, stiffness, and thermal conductivity.
142 Apparatus for control of uniform gravity utilizing superconducting magnet US10485061 2001-09-17 US06891455B2 2005-05-10 Hong-Beom Jin; Ki-Deok Sim; Byeung-Sang Park; Hyung-Jin Kim; Ho-Hwan Han; Kyung-Han Kim; Suk-Jin Choi
A gravity control apparatus is provided, in which is controlled through the superconducting coil designed for generating uniform magnetic force. The gravity control apparatus includes a hollow cylindrical low temperature container; a combination of B0 coil and a symmetric and/or asymmetric gradient magnetic field generating coil having a predetermined length and inner and outer radiuses, wherein each of B0 coil and gradient magnetic field generating coil is wound onto a bobbin which is installed to the low temperature container so as to form a superconducting magnet, and the B0 coil has three solenoid coils which are arrayed in three parts with a predetermined spacing so as to generate, from the center of the B0 coil, uniform magnetic field having constant magnetic flux density; and a power unit for supplying operating current to each of coils. Thus, gravity acting on the material disposed in the hollow center of the low temperature container can be compensated with a uniform magnetic force.
143 Cryogen-free high temperature superconducting magnet with thermal reservoir US10671146 2003-09-24 US20050062473A1 2005-03-24 David Ryan; Evangelos Laskaris; Xianrui Huang
A cryogen free superconducting magnet assembly having a high Tc superconducting magnet and a thermal reservoir in thermal contact with the high Tc superconducting magnet. A method of cooling a cryogen free superconducting magnet assembly and an MRI system having cryogen free superconducting magnet assemblies.
144 Superconducting magnetic field generation apparatus and sputter coating apparatus US10913369 2004-08-09 US20050030017A1 2005-02-10 Yoshitaka Ito; Masaaki Yoshikawa; Yousuke Yanagi; Hiroyasu Nomachi
A superconducting magnetic field generating apparatus includes a superconducting body for generating a magnetic field below a critical temperature of the superconducting body, a thermal insulation vessel having a space for accommodating the superconducting body, and a ferromagnetic body for adjusting a magnetic field distribution generated from the superconducting body wherein at least a part of the ferromagnetic body is disposed around the superconducting body and a magnetic circuit is formed so as to form the magnetic field distribution in a common side of the superconducting body and the part of the ferromagnetic body.
145 Superconducting levitation magnet US10680569 2003-10-07 US06850137B2 2005-02-01 Mark D. Bird; James Brooks; Yehia M. Eyssa
A cost effective apparatus and method for levitating a diamagnetic material using a magnetic field produced by a superconducting magnet. Concentric superconducting coils produces magnetic fields when energized with current. The magnetic fields of the coils combine to produce an operational magnetic field for levitating the diamagnetic material inside a central bore.
146 Super conductive magnet apparatus US10765166 2004-01-28 US20040185305A1 2004-09-23 Takeo Nemoto; Hiroyuki Watanabe
In a super conductive magnet apparatus comprising a super conductive coil, a helium containing volume for containing therein liquid helium to keep a temperature of the super conductive coil low, and a vacuum vessel containing therein the super conductive coil and the helium containing volume, the super conductive magnet apparatus further comprises a support body on which the super conductive coil is arranged, a container cover forming the helium containing volume with the support body in such a manner that a thermal energy is capable of being transmitted between the super conductive coil and the liquid helium, and a connecting member connecting the support body to the vacuum vessel so that the support body is supported through the connecting member on the vacuum vessel.
147 Superconducting shielded core reactor with reduced AC losses US10328324 2002-12-23 US20040120083A1 2004-06-24 Yung S. Cha; John R. Hull
A superconducting shielded core reactor (SSCR) operates as a passive device for limiting excessive AC current in a circuit operating at a high power level under a fault condition such as shorting. The SSCR includes a ferromagnetic core which may be either closed or open (with an air gap) and extends into and through a superconducting tube or superconducting rings arranged in a stacked array. First and second series connected copper coils each disposed about a portion of the iron core are connected to the circuit to be protected and are respectively wound inside and outside of the superconducting tube or rings. A large impedance is inserted into the circuit by the core when the shielding capability of the superconducting arrangement is exceeded by the applied magnetic field generated by the two coils under a fault condition to limit the AC current in the circuit. The proposed SSCR also affords reduced AC loss compared to conventional SSCRs under continuous normal operation.
148 Superconducting levitation magnet US10680569 2003-10-07 US20040113503A1 2004-06-17 Mark D. Bird; James Brooks; Yehia M. Eyssa
A cost effective apparatus and method for levitating a diamagnetic material using a magnetic field produced by a superconducting magnet. Concentric superconducting coils produces magnetic fields when energized with current. The magnetic fields of the coils combine to produce an operational magnetic field for levitating the diamagnetic material inside a central bore.
149 SUPPORT MEMBER FOR A SUPERCONDUCTING MAGNET ASSEMBLY US10707073 2003-11-19 US20040108925A1 2004-06-10 David George Reeves
A superconducting magnet assembly is described wherein the magnet cartridge is suspended within the vacuum chamber by a single support member extending from a wall of the vacuum chamber to the magnet cartridge. In one aspect, the support member includes a support tube and a joint attached to an end of the support tube. The joint is attached to the wall of the outer vacuum chamber, and provides at least one degree of freedom to the support tube relative to the wall. In another aspect, a joint is attached to an opposite end of the support tube, and is attached to the magnet cartridge for providing at least one degree of freedom to the support tube relative to the magnet cartridge. In another aspect, the support is constructed from one or more sections and the material choice is governed by the requirements for strength, stiffness, and thermal conductivity.
150 Single crystal pulling device and method and superconducting magnet US10448343 2003-05-30 US20040107894A1 2004-06-10 Tsutomu Shimonosono; Yoshihiro Koguchi; Takashi Sasaki
A single crystal pulling device is composed of a cylindrical pulling furnace, a crucible disposed in the pulling furnace in which a single crystal material for a semiconductor is poured, a cylindrical vacuum vessel coaxially disposed around the pulling furnace, and a superconducting magnet composed of a plurality pairs of coils arranged inside the vacuum vessel so as to generate magnetic field. The superconducting coils are arranged on the same horizontal plane of the cylindrical vacuum vessel, and each of the paired superconducting coils includes coils set so as to oppose to each other with respect to a central axis of the cylindrical vacuum vessel so that one coil of one pair of coils and one coil of another pair of coils adjacent to that one pair of coils constitutes a set angle, directing towards the inside of the cylindrical vessel, in a range of 100null to 130null.
151 Mechanical stabilizer-tuned damper for high field open magnet US09737084 2000-12-14 US06636136B1 2003-10-21 Michael J. Radziun; Scott T. Mansell; Andrew T. Bollinger; Long-Zhi Jiang; Gregory A. Lehmann; Timothy J. Havens; Yu Wang
A mechanical stabilizer-tuned damper is attachable to the first upper magnet assembly of a high field open magnet, which magnet includes a first upper magnet assembly, a lower second magnet assembly and at least one non-magnetizable support beam therebetween. The mechanical stabilizer-tuned damper reduces the dynamic response of the magnet. A connecting device is provided which consists of a threaded rod mounted to an attachment bracket through a linear bearing and vibration mount. A series of non-magnetic and extremely low conductivity plates of various weights are attachable to the rod to change the mass and the tuning frequency of the damper. The location and size of the mechanical stabilizer-tuned damper are determined to balance the frequency of the field oscillation and physical room. The direction of orientation depends upon the direction of motion to be dampened or controlled.
152 Superconducting device with inductive current limiter using a high-tc superconducting material US10333462 2003-01-21 US20030191028A1 2003-10-09 Heinz-Werner Neumnullller; Gunter Ries
The invention relates to a superconducting device (22) that comprises an inductive current limiter (28a, 29b) with an annular element (27a, 27b) produced from high-Tc superconducting material. The device is further provided with a soft-magnetic yoke leg (26c, 26d) enclosed by said material and with a transformer (23) with primary and secondary windings (24, 25) and a soft-magnetic flux element (26) with a plurality of yoke legs (26a-26e). The magnetic flux element (26) is designed to contain between the primary winding (24) and the secondary winding (25) of the transformer (23) the yoke leg (26c, 26d) of the current limiter (28), the conductor of one winding (24) producing a switch current for the current limiter (28).
153 Dimensioning of magnet arrangement comprising an additional current carrying coil system US09930948 2001-08-17 US20030095021A1 2003-05-22 Robert Schauwecker; Pierre-Alain Bovier; Andreas Amann; Werner Tschopp
In a magnet arrangement (M, D, P1, . . . , Pn) having a magnet coil system (M) with at least one current-carrying superconducting magnet coil, with an additional current-carrying coil system (D) which can be fed by an external current source to produce a magnetic field in the working volume which differs substantially from zero, and optionally with additional superconductingly closed current paths (P1, . . . , Pn), wherein the magnetic fields in the z direction, generated by the additional current paths (P1, . . . , Pn) due to currents induced during operation and the field of the additional current-carrying coil system (D) do not exceed 0.1 Tesla in the working volume, the additional coil system (D) is designed such that its field contribution to the working volume is determined taking into account the diamagnetism of the superconductor in the main coil system. This permits as large as possible an effective field efficiency of the additional coil system (D).
154 Open magnet with recessed field shaping coils US09949623 2001-09-10 US06504461B2 2003-01-07 Xianrui Huang; Michael Anthony Palmo, Jr.; Evangelos Trifon Laskaris; Bruce Campbell Amm
A pole piece for use in an open magnet includes a magnetizable body of generally cylindrical shape and made of a ferromagnetic material with a plurality of concentrically-arranged, annular-shaped, radially spaced-apart grooves formed in the inner surface of the pole piece. A plurality of annular-shaped, electrically conductive coils are disposed within the grooves. The pole piece with recessed shielding coils is situated within a cryogenic vessel to maintain the pole pieces at a uniform cryogenic temperature. The result is an open magnet structure which provides a highly uniform, high field, open field of view for MRI with a well-contained stray field.
155 Dimensioning of a superconducting shim device in a superconducting magnet arrangement US09930955 2001-08-17 US06496091B2 2002-12-17 Robert Schauwecker; Pierre-Alain Bovier; Andreas Amann; Werner Tschopp
A superconducting magnet arrangement (M, S, P1, . . . , Pn) for generating a magnetic field in the direction of a z axis in a working volume, disposed about z=0, comprising a magnet coil system (M) with at least one current-carrying superconducting magnet coil, a shim device (S) with at least one superconducting shim coil and additional superconductingly closed current paths (P1, . . . , Pn), wherein the magnetic fields generated in the z direction and in the working volume by the additional current paths due to induced currents during operation, do not exceed a magnitude of 0.1 Tesla, and wherein the shim device generates a field which varies along the z axis with a kth power of z for an even power of k>0, is characterized in that the shim device is designed such that the effective field efficiency gSeff of the shim device is substantially zero taking into consideration the diamagnetism of the superconductor in the magnet coil system.
156 Apparatus and method for a superconductive magnet with pole piece US09716127 2000-11-17 US06396376B1 2002-05-28 Evangelos Trifon Laskaris; Michael Anthony Palmo
A magnet, such as an open magnetic-resonance-imaging (MRI) magnet) has a first assembly including a superconductive main coil and a magnetizable pole piece which, during magnet operation, has a temperature equal to generally the temperature of the main coil. In one example, a cryogenic-fluid (e.g., liquid helium) dewar encloses the main coil, and the dewar has an interior surface defined in part by a surface portion of the pole piece. A method for providing a homogeneous imaging volume for a magnet includes steps to construct the above-described magnet.
157 Laminated composite shell assembly with joint bonds US09196424 1998-11-19 US06358583B1 2002-03-19 Somanath Nagendra; Evangelos Trifon Laskaris; Xianrui Huang
A laminated composite shell assembly includes composite shells assembled together and having joint bonds connecting the assembly with an external structure and pinch rings assembled to the shells adjacent the joint bonds so as to reinforce the same. The composite shells and pinch rings are cylindrical in configuration and made of layers of graphite-epoxy material having fibers oriented in desired stacking sequences. The shells and pinch rings are concentrically assembled in a desired sequence with some of the shells being adapted to perform a structural load bearing function while others of the shells are adapted to perform a load transfer function and with the pinch rings adapted to perform additional stiffening as well as load redistributing and transfer functions in the regions of the joint bonds between the assembled shells and the external structure.
158 MRI with superconducting coil US09363179 1999-07-29 US06323749B1 2001-11-27 Hank Hsieh
A magnetic resonance imaging magnet for examining a patient comprises ferromagnetic pole pieces defining a patient-receiving gap for examining a patient. Coil assemblies for producing a magnetic field include at least one coil mounted adjacent to at least one thermally conductive member.
159 Open magnet with floor mount US09436828 1999-11-09 US06198371B1 2001-03-06 Evangelos Trifon Laskaris; Yu Wang; James Pellegrino Alexander
A vertically-aligned open magnet includes first and second (i.e., top and bottom) assemblies each having a longitudinally-extending and vertically-aligned axis, a superconductive main coil, and a vacuum enclosure enclosing the main coil. At least one support beam has a first end attached to the first assembly and has a second end attached to the second assembly. An annularly-cylindrical support skirt is coaxially aligned with the axes, has a first longitudinal end attached to the second assembly and has a second longitudinal end supportable by a floor.
160 Superconductive magnet having a tube suspension assembly US441172 1999-11-15 US6081178A 2000-06-27 Yu Wang; Evangelos Trifon Laskaris; John Arthur Urbahn
A superconductive magnet includes a cryogenic vessel enclosing superconductive coils, a thermal shield enclosing the cryogenic vessel, a vacuum enclosure enclosing the thermal shield, a tube suspension assembly having a plurality of tubes located between respective ones of the cryogenic vessel, thermal shield and vacuum enclosure and axially overlapped and interconnected with the cryogenic vessel, thermal shield and vacuum enclosure and the tubes forming bonded joints with one another, and a plurality of locking clip arrangements attached to and having portions at least partially overlapping the bonded joints of the tubes of the suspension assembly so as to reinforce and strengthen the bonded joints.
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