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1. 发明授权

US5034713A Radial support system for a MR magnet 失效
标题翻译： MR磁铁径向支撑系统
公开(公告)号：US5034713A
公开(公告)日：1991-07-23
申请号：US505629
申请日：1990-04-06
申请人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
发明人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
IPC分类号： H01F6/00 , F17C13/00 , G01R33/3815 , H01F6/04
CPC分类号： G01R33/3815
摘要： A refrigerated superconductive magnet is provided with six magnet cartridge radial struts supporting the magnet cartridge in the vertical and lateral directions. The struts are positioned such that two lateral struts on each end of the magnet cartridge react against the contact force of the cryocooler cold head and support half of the vertical (gravitational) load of the magnet cartridge. Two vertical struts support the other half of the vertical load. The vertical struts pivot to allow the cartridge axial centerline to shrink towards the cryocooler interface during cool down. The strut attachment points have been located near the horizontal midplane in order to minimize the sag of the magnet cartridge due to its own weight.

2. 发明授权

US5083105A Axial support system for a MR magnet 失效
标题翻译： MR磁铁的轴支撑系统
公开(公告)号：US5083105A
公开(公告)日：1992-01-21
申请号：US505630
申请日：1990-04-06
申请人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
发明人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
IPC分类号： H01F6/00 , G01R33/38 , G01R33/3815
CPC分类号： G01R33/3815 , G01R33/3802
摘要： Four magnet cartridge axial supports are provided to prevent axial motion between the magnet cartridge and the surrounding vacuum vessel. Each axial support includes two high strength steel rods in parallel. The rods are brazed to a bar on one end which mounts to the magnet cartridge. The other end of the rods is brazed to a threaded stud which is secured by a bolt to a bracket secured to the vacuum vessel.

3. 发明授权

US5032869A Axial thermal shield support for a MR magnet 失效
标题翻译：用于MR磁铁的轴向热屏蔽支架
公开(公告)号：US5032869A
公开(公告)日：1991-07-16
申请号：US505631
申请日：1990-04-06
申请人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
发明人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
IPC分类号： H01F7/20 , F17C13/00 , G01R33/3815 , H01F6/00 , H01F6/04
CPC分类号： G01R33/3815
摘要： Two pair of thermal shield axial supports are provided. Each support includes a strand of wire brazed on either end into threaded studs. One stud is threaded into a topped hole in the end of the magnet cartridge. The stud on the other end extends through a clearance hole on the end flange of the thermal shield. Belleville spring washers are compressed against the shield by a nut. Prior to cool down, the Belleville washers are compressed. As the shield and magnet cool down, the shield contracts axially with respect to the magnet cartridge, thus relaxing the washer stack compression. The wire tension relaxes from the maximum pretension to a nominal tension at operating temperature.

4. 发明授权

US5571606A Ceramic superconducting lead resistant to breakage 失效
公开(公告)号：US5571606A
公开(公告)日：1996-11-05
申请号：US440160
申请日：1995-05-12
申请人： Robert A. Ackermann , Kenneth G. Herd , Evangelos T. Laskaris , Richard A. Ranze
发明人： Robert A. Ackermann , Kenneth G. Herd , Evangelos T. Laskaris , Richard A. Ranze
IPC分类号： B32B5/22 , F17C13/00 , F25D19/00 , G01R33/3815 , H01F6/06 , B32B9/00
CPC分类号： B32B5/22 , F25D19/006 , G01R33/3815 , H01F6/04 , H01F6/065 , Y10S428/93 , Y10S505/701 , Y10T428/24917 , Y10T428/249951 , Y10T428/2929 , Y10T428/2958
摘要： A superconductive lead assembly for a superconductive device (e.g., magnet) cooled by a cryocooler coldhead having first and second stages. A first ceramic superconductive lead has a first end flexibly, dielectrically, and thermally connected to the first stage and a second end flexibly, dielectrically, and thermally connected to the second stage. A jacket of open cell material (e.g., polystyrene foam) is in general surrounding compressive contact with the first ceramic superconductive lead, and a rigid support tube generally surrounds the jacket. This protects the first ceramic superconductive lead against shock and vibration while in the device. The rigid support tube has a first end and a second end, with the second end thermally connectable to the second stage.

5. 发明授权

US5439543A Apparatus and method for passive shimming of a superconducting magnet which images human limbs 失效
标题翻译：用于对人体肢体进行成像的超导磁体的被动匀场装置和方法
公开(公告)号：US5439543A
公开(公告)日：1995-08-08
申请号：US183375
申请日：1994-01-19
申请人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd , Raymond E. Gabis
发明人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd , Raymond E. Gabis
IPC分类号： G01R33/385 , G01R33/3873 , B65H81/00
CPC分类号： G01R33/3873 , G01R33/385
摘要： This invention relates to an apparatus and method for providing passive shimming for a superconducting magnet of the type that has a relatively small imaging volume. Such structures of this type, generally, provide the proper amount of passive shimming for a relatively small imaging volume.
摘要翻译：本发明涉及一种用于为具有相对小的成像体积的类型的超导磁体提供被动匀场的装置和方法。这种类型的这种结构通常为相对小的成像体积提供适当量的被动匀场。

6. 发明授权

US5430423A Superconducting magnet having a retractable cryocooler sleeve assembly 失效
标题翻译：超导磁体具有可缩回的低温冷却套筒组件
公开(公告)号：US5430423A
公开(公告)日：1995-07-04
申请号：US201968
申请日：1994-02-25
申请人： Kenneth G. Herd , Evangelos T. Laskaris , Paul S. Thompson
发明人： Kenneth G. Herd , Evangelos T. Laskaris , Paul S. Thompson
IPC分类号： A61B5/055 , F17C13/00 , F25D19/00 , G01R33/3815 , H01F6/04 , H01F6/06 , H01L39/04 , F17C7/02 , H01F1/00
CPC分类号： F25D19/006 , G01R33/3815 , H01F6/04
摘要： A superconducting magnet includes a cryocooler coldhead, a sleeve assembly, and a superconducting coil assembly. The sleeve assembly includes a flexible bellows and a sleeve tube and is attached to the superconducting coil assembly so that it may be retracted about one-eighth of an inch breaking thermal contact of the sleeve assembly with the coil assembly's magnet cartridge and thermal shield while remaining hermetically connected to the coil assembly's vacuum enclosure. The coldhead's housing is attached to the sleeve assembly so that the coldhead's first and second stage make unconnected thermal contact with the sleeve assembly. By first retracting the sleeve assembly, the coldhead may be removed therefrom without room temperature air forming an ice ball on the surfaces of the sleeve assembly and without a heat load being transferred to quench the superconducting coil assembly. This permits continuous magnet operation using dual coldheads and dual sleeve assemblies.
摘要翻译：超导磁体包括低温冷却器冷头，套管组件和超导线圈组件。套筒组件包括柔性波纹管和套管，并且连接到超导线圈组件，使得其可以在保持时围绕套筒组件与线圈组件的磁体盒和热屏蔽的八分之一英寸的断开热接触缩回气密地连接到线圈组件的真空外壳。冷头的壳体连接到套筒组件，使得冷头的第一和第二阶段与套筒组件形成未连接的热接触。通过首先缩回套筒组件，可以从其中移除冷头，而无需室温空气在套筒组件的表面上形成冰球，并且不传递热负荷以淬火超导线圈组件。这允许使用双冷头和双套筒组件进行连续磁铁操作。

7. 发明授权

US5304934A Superconducting magnet for imaging human limbs 失效
标题翻译：用于成像人体四肢的超导磁体
公开(公告)号：US5304934A
公开(公告)日：1994-04-19
申请号：US302
申请日：1993-01-04
申请人： Evangelos T. Laskaris , Bizhan Dorri , Kenneth G. Herd
发明人： Evangelos T. Laskaris , Bizhan Dorri , Kenneth G. Herd
IPC分类号： G01R33/3815 , G01R33/385 , G01R33/3873 , G01R33/20
CPC分类号： G01R33/3815 , G01R33/385 , G01R33/3873
摘要： This invention relates to a superconducting magnet of the type that has a relatively small imaging volume. Such structures of this type, generally, allow the operator to image human limbs without the use of a larger, more costly superconducting magnet.
摘要翻译：本发明涉及一种具有相对小的成像体积的超导磁体。这种类型的这种结构通常允许操作者在不使用更大，更昂贵的超导磁体的情况下对人体肢体进行成像。

8. 发明授权

US5552372A Ceramic superconducting lead resistant to breakage 失效
公开(公告)号：US5552372A
公开(公告)日：1996-09-03
申请号：US439168
申请日：1995-05-11
申请人： Robert A. Ackermann , Kenneth G. Herd , Evangelos T. Laskaris , Richard A. Ranze
发明人： Robert A. Ackermann , Kenneth G. Herd , Evangelos T. Laskaris , Richard A. Ranze
IPC分类号： B32B5/22 , F17C13/00 , F25D19/00 , G01R33/3815 , H01F6/06 , B32B9/00
CPC分类号： B32B5/22 , F25D19/006 , G01R33/3815 , H01F6/04 , H01F6/065 , Y10S428/93 , Y10S505/701 , Y10T428/24917 , Y10T428/249951 , Y10T428/2929 , Y10T428/2958
摘要： A superconductive lead assembly for a superconductive device (e.g., magnet) cooled by a cryocooler coldhead having first and second stages. A first ceramic superconductive lead has a first end flexibly, dielectrically, and thermally connected to the first stage and a second end flexibly, dielectrically, and thermally connected to the second stage. A jacket of open cell material (e.g., polystyrene foam) is in general surrounding compressive contact with the first ceramic superconductive lead, and a rigid support tube generally surrounds the jacket. This protects the first ceramic superconductive lead against shock and vibration while in the device. The rigid support tube has a first end and a second end, with the second end thermally connectable to the second stage.

9. 发明授权

US5396206A Superconducting lead assembly for a cryocooler-cooled superconducting magnet 失效
标题翻译：用于低温冷却器超导磁体的超导引线组件
公开(公告)号：US5396206A
公开(公告)日：1995-03-07
申请号：US209287
申请日：1994-03-14
申请人： Kenneth G. Herd , Evangelos T. Laskaris , Paul S. Thompson
发明人： Kenneth G. Herd , Evangelos T. Laskaris , Paul S. Thompson
IPC分类号： H01L39/04 , H01B12/02 , H01F6/00 , H01F6/06 , H01F7/22
CPC分类号： H01F6/065 , Y10S505/844 , Y10S505/879 , Y10S505/893
摘要： A superconducting magnet lead assembly for a cryocooler-cooled superconducting magnet having a design current of between generally 50 and 250 amperes. A DBCO (Dysprosium Barium Copper Oxide), YBCO (Yttrium Barium Copper Oxide), or BSCCO (Bismuth Strontium Calcium Copper Oxide) superconducting lead has its ends flexibly, dielectrically, and thermally connected, one end to the generally 30 to 50 Kelvin first stage and the other end to the generally 8 to 30 Kelvin second stage of the cryocooler coldhead. The superconducting lead has a generally constant cross-sectional area along its length. The design current, the lead's length, and the lead's cross-sectional area are chosen such that the design current times the lead's length divided by the lead's cross-sectional area is between generally 720 and 880 amperes per centimeter for a DBCO or YBCO lead and is between generally 180 and 220 amperes per centimeter for a BSCCO lead. The superconducting lead will not itself precipitate a magnet quench (i.e., the superconducting lead does not conduct significant heat between the coldhead stages during the superconductive mode), and the superconducting lead will survive a lead quench from other causes (i.e., the superconducting lead does conduct the resistive heat buildup to the coldhead stages during a lead quench) and thus be acceptable for commercial applications.
摘要翻译：一种用于低温冷却超导磁体的超导磁体引线组件，其具有大致50和250安培之间的设计电流。 DBCO（氧化镝钡氧化物），YBCO（钇钡氧化铜）或BSCCO（铋锶钙氧化铜）超导引线的端部灵活，电介质和热连接，一端通常为30至50开尔文第一级另一端通常是低温冷冻机的8〜30开尔文第二阶段。超导引线沿其长度具有大致恒定的横截面积。选择设计电流，引线长度和引线的横截面积，使得引线长度除以引线横截面积的设计电流乘以DBCO或YBCO引线的通常为720至880安培/厘米，对于BSCCO铅，通常在每平方米180和220安培之间。超导引线本身不会沉淀磁体淬火（即超导引线在超导模式之间的冷端阶段之间不会产生显着的热），并且超导引线将在其他原因引起的猝熄（例如，超导引线在铅淬火期间对冷头阶段进行电阻积热），因此对于商业应用是可以接受的。

10. 发明授权

US5260266A High-TC superconducting lead assembly in a cryostat dual penetration for refrigerated superconductive magnets 失效
标题翻译：高TC超导导线组件，用于冷冻超导磁体的低温恒湿双重穿透
公开(公告)号：US5260266A
公开(公告)日：1993-11-09
申请号：US833194
申请日：1992-02-10
申请人： Kenneth G. Herd , Evangelos T. Laskaris
发明人： Kenneth G. Herd , Evangelos T. Laskaris
IPC分类号： F17C13/00 , H01F6/06 , H01B12/00 , H01L39/12
CPC分类号： H01F6/065 , Y10S505/78 , Y10S505/891
摘要： This invention relates to high-Tc superconducting lead assemblies in a cryostat dual penetration for refrigerated superconductive magnets. Such structures of this type, generally, provide electrically isolated current paths with minimal heat leak between the 10K thermal station and the 50K thermal station while allowing for differential thermal contraction in the assembly, thus avoiding undesirable stresses in the leads.
摘要翻译：本发明涉及用于冷冻超导磁体的低温恒温双重穿透中的高Tc超导引线组件。这种类型的这种结构通常提供电隔离的电流路径，在10K加热站和50K加热站之间具有最小的热泄漏，同时允许组件中的差异热收缩，从而避免引线中的不期望的应力。

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