Method and apparatus for passive shimming of magnets
    1.
    发明授权
    Method and apparatus for passive shimming of magnets 失效
    用于磁体被动调光的方法和装置

    公开(公告)号:US07196520B2

    公开(公告)日:2007-03-27

    申请号:US10904094

    申请日:2004-10-22

    IPC分类号: G01V3/00

    CPC分类号: G01R33/3873

    摘要: An apparatus and method for shimming a magnetic field of a magnet in a volume of interest includes a nonmagnetic holder configured with an array of fluid containing pockets; and a solidified ferromagnetic fluid in each pocket of the array of fluid containing pockets, wherein the solidified ferromagnetic fluid is fabricated from a ferromagnetic fluid, a diluting liquid, a hardener, and an accelerator agent. The ferromagnetic fluid includes a carrier liquid, ferromagnetic particles, and a surfactant.

    摘要翻译: 用于对感兴趣的体积中的磁体的磁场进​​行匀场的装置和方法包括:非磁性保持器,其配置有包含口袋的流体阵列; 以及在包含凹穴的流体阵列的每个凹槽中的固化铁磁流体,其中固化的铁磁流体由铁磁流体,稀释液体,固化剂和促进剂制成。 铁磁流体包括载液,铁磁颗粒和表面活性剂。

    METHOD AND APPARATUS FOR PASSIVE SHIMMING OF MAGNETS
    2.
    发明申请
    METHOD AND APPARATUS FOR PASSIVE SHIMMING OF MAGNETS 失效
    磁体被动遮蔽的方法和装置

    公开(公告)号:US20060208732A1

    公开(公告)日:2006-09-21

    申请号:US10904094

    申请日:2004-10-22

    IPC分类号: G01V3/00 H01F7/02

    CPC分类号: G01R33/3873

    摘要: An apparatus and method for shimming a magnetic field of a magnet in a volume of interest includes a nonmagnetic holder configured with an array of fluid containing pockets; and a solidified ferromagnetic fluid in each pocket of the array of fluid containing pockets, wherein the solidified ferromagnetic fluid is fabricated from a ferromagnetic fluid, a diluting liquid, a hardener, and an accelerator agent. The ferromagnetic fluid includes a carrier liquid, ferromagnetic particles, and a surfactant.

    摘要翻译: 用于对感兴趣的体积中的磁体的磁场进​​行匀场的装置和方法包括:非磁性保持器,其配置有包含口袋的流体阵列; 以及在包含凹穴的流体阵列的每个凹槽中的固化铁磁流体,其中固化的铁磁流体由铁磁流体,稀释液体,固化剂和促进剂制成。 铁磁流体包括载液,铁磁颗粒和表面活性剂。

    Balanced quench protection circuit
    5.
    发明授权
    Balanced quench protection circuit 有权
    平衡淬火保护电路

    公开(公告)号:US06717781B2

    公开(公告)日:2004-04-06

    申请号:US09682589

    申请日:2001-09-25

    IPC分类号: H02H700

    摘要: A superconducting magnet electrical circuit is provided for quench protection. A superconducting coil assemblage is provided including a plurality of spatially separated main and secondary magnet coil portions. The main magnet coil portions are connected in series to form at least one main coil series circuit. The secondary magnet coil portions are also connected in a series to form at least one secondary coil series circuit. At least one temperature limiting circuit is also provided. The temperature limiting circuit may be a quench heater circuit or a quench resistor circuit. The temperature limiting circuit has a plurality of quench heaters or a plurality of quench resistors connected with the superconducting coil assemblage. A superconductive switch is coupled with the superconducting coil assemblage.

    摘要翻译: 提供超导磁体电路用于淬火保护。 提供了包括多个空间分离的主和次级磁体线圈部分的超导线圈组件。 主电磁线圈部分串联连接以形成至少一个主线圈串联电路。 次级电磁线圈部分也被串联连接以形成至少一个次级线圈串联电路。 还提供至少一个温度限制电路。 温度限制电路可以是淬火加热器电路或淬火电阻电路。 温度限制电路具有与超导线圈组合件连接的多个骤冷加热器或多个骤冷电阻器。 超导开关与超导线圈组合连接。

    Liquid helium level sensor for use in a cryogenic environment and method for assembling same
    8.
    发明授权
    Liquid helium level sensor for use in a cryogenic environment and method for assembling same 有权
    用于低温环境的液氦液位传感器及其组装方法

    公开(公告)号:US06925873B2

    公开(公告)日:2005-08-09

    申请号:US10439395

    申请日:2003-05-16

    IPC分类号: G01F23/00 G01F23/22 G01F23/24

    CPC分类号: G01F23/246 G01F23/22

    摘要: The present invention provides a method and apparatus for measuring the level of a liquid cryogen. The invention provides for use of a current source (52), a length, or multiple lengths, of superconducting filament (40) situated within a cryostat (1) containing a cryogenic fluid (2) and a voltmeter (51) for measuring the voltage drop across the filament (40). The invention further provides a method for using said apparatus.

    摘要翻译: 本发明提供了一种用于测量液体冷冻剂水平的方法和装置。 本发明提供使用位于包含低温流体(2)和电压计(51)的低温恒温器(1)内的超导细丝(40)的电流源(52),长度或多个长度,用于测量电压 穿过灯丝(40)。 本发明还提供了一种使用所述装置的方法。

    Method and apparatus for actively controlling quench protection of a superconducting magnet
    10.
    发明授权
    Method and apparatus for actively controlling quench protection of a superconducting magnet 有权
    主动控制超导磁体淬火保护的方法和装置

    公开(公告)号:US07876100B2

    公开(公告)日:2011-01-25

    申请号:US12567846

    申请日:2009-09-28

    IPC分类号: G01V3/00

    摘要: A method and apparatus for actively controlling quench protection of a superconducting magnet includes a magnetic resonance imaging (MRI) system and a computer readable storage medium having stored thereon a computer program comprising instructions which when executed by a computer cause the computer to detect a quench condition of the superconducting magnet. The instructions also cause the computer to actively control a quench protection system of the superconducting magnet in response to the detected quench condition.

    摘要翻译: 用于主动控制超导磁体的淬火保护的方法和装置包括磁共振成像(MRI)系统和其上存储有计算机程序的计算机可读存储介质,所述计算机程序包括当计算机执行时使计算机检测淬火条件的指令 的超导磁体。 指令还使得计算机响应于检测到的淬火条件主动地控制超导磁体的淬火保护系统。