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    Electron collector system
    1.
    发明授权
    Electron collector system 失效
    电子收集器系统

    公开(公告)号：US06980628B2

    公开(公告)日：2005-12-27

    申请号：US10708918

    申请日：2004-03-31

    申请人： Liqin Wang ,  Michael Scott Hebert ,  Mark Derakhshan ,  Ron Kent Hockersmith

    发明人： Liqin Wang ,  Michael Scott Hebert ,  Mark Derakhshan ,  Ron Kent Hockersmith

    IPC分类号： H05G1/02 ,  G21K1/00 ,  H01J35/04 ,  H01J35/16 ,  H01J35/18

    CPC分类号： H01J35/18 ,  H01J35/16 ,  H05G1/025

    摘要： A slotted window collector assembly for an x-ray tube having an anode and a cathode includes a collector having an anode side and a cathode side, which opposes the anode side. The anode side and the cathode side define an internal bore there between for receiving x-rays from the anode. The slotted collector further includes a window side common to both the anode side and the cathode side and having a window coupled thereto, wherein a window aperture is defined extending from the window to the internal bore. Within the collector assembly, a slot is defined intersecting the window aperture and extending trans-axially thereto and beyond a set length. The slot also extends circumferentially with the window such that plastic strain on the window and heat transferred to the window are reduced.

    摘要翻译： 用于具有阳极和阴极的X射线管的开槽窗收集器组件包括具有与阳极侧相对的阳极侧和阴极侧的集电器。 阳极侧和阴极侧在其间限定内部孔，用于接收来自阳极的x射线。 开槽收集器还包括与阳极侧和阴极侧共同的窗口侧，并且具有与其连接的窗口，其中窗口从窗口延伸到内孔。 在收集器组件内，定义了与窗口相交并且在轴向延伸并超出设定长度的槽。 狭槽也与窗口周向延伸，使得窗户上的塑性应变和传递到窗户的热量减少。

    ELECTRON COLLECTOR SYSTEM
    2.
    发明申请
    ELECTRON COLLECTOR SYSTEM 失效
    电子收集系统

    公开(公告)号：US20050226386A1

    公开(公告)日：2005-10-13

    申请号：US10708918

    申请日：2004-03-31

    申请人： Liqin Wang ,  Michael Hebert ,  Mark Derakhshan ,  Ron Hockersmith

    发明人： Liqin Wang ,  Michael Hebert ,  Mark Derakhshan ,  Ron Hockersmith

    IPC分类号： H05G1/02 ,  G21K1/00 ,  H01J35/04 ,  H01J35/16 ,  H01J35/18

    CPC分类号： H01J35/18 ,  H01J35/16 ,  H05G1/025

    摘要： A slotted window collector assembly for an x-ray tube having an anode and a cathode includes a collector having an anode side and a cathode side, which opposes the anode side. The anode side and the cathode side define an internal bore there between for receiving x-rays from the anode. The slotted collector further includes a window side common to both the anode side and the cathode side and having a window coupled thereto, wherein a window aperture is defined extending from the window to the internal bore. Within the collector assembly, a slot is defined intersecting the window aperture and extending trans-axially thereto and beyond a set length. The slot also extends circumferentially with the window such that plastic strain on the window and heat transferred to the window are reduced.

    摘要翻译： 用于具有阳极和阴极的X射线管的开槽窗收集器组件包括具有与阳极侧相对的阳极侧和阴极侧的集电器。 阳极侧和阴极侧在其间限定内部孔，用于接收来自阳极的x射线。 开槽收集器还包括与阳极侧和阴极侧共同的窗口侧，并且具有与其连接的窗口，其中窗口从窗口延伸到内孔。 在收集器组件内，定义了与窗口相交并且在轴向延伸并超过设定长度的槽。 狭槽也与窗口周向延伸，使得窗户上的塑性应变和传递到窗户的热量减少。

    Apparatus and method for controlling a cryocooler by adjusting cooler gas flow oscillating frequency
    4.
    发明授权
    Apparatus and method for controlling a cryocooler by adjusting cooler gas flow oscillating frequency 有权
    通过调节冷却器气流振荡频率来控制低温冷却器的装置和方法

    公开(公告)号：US07412835B2

    公开(公告)日：2008-08-19

    申请号：US11167850

    申请日：2005-06-27

    申请人： Edwin L. Legall ,  Longzhi Jiang ,  Roy A. Mangano ,  Mark Derakhshan

    发明人： Edwin L. Legall ,  Longzhi Jiang ,  Roy A. Mangano ,  Mark Derakhshan

    IPC分类号： F25D9/00 ,  F25B1/00 ,  F25B49/00

    CPC分类号： G05D23/1919 ,  F25B9/10 ,  F25B9/14 ,  F25B9/145 ,  F25B2309/1411 ,  F25B2309/1428 ,  F25B2400/17 ,  F25D19/00 ,  F25D19/006 ,  F25D29/00 ,  F25D2400/02

    摘要： Systems and methods are provided for a variable cooling capacity cryocooler for a superconducting magnetic resonance imaging device having a liquid cryogen pressure vessel to provide cryogenic temperatures to a magnet assembly, a vacuum vessel surrounding the pressure vessel and a radiation shield spaced from the cryogen pressure vessel, and a pressure sensor positioned inside the cryogen pressure vessel pressure boundary for sensing pressure variations. A controller for varying the heat removal rate of the cryocooler based on the pressure variations in the cryogen pressure vessel and where the cooling capacity of the cryocooler is adjusted by modifying the speed of the electric power drive (DC or AC motors) or by changing the mechanical transmission ratio between the constant speed electric power drive and the cryocooler displacer/piston to adjust the cooler oscillating frequency of the gas flow. The invention can be adapted to magnets or non magnets systems using Stirling, Gifford-McMahon (“GM”) and Pulse Tube (“PT”) cooler systems. The system will extend component end of life and provide a controllable constant pressure improving image quality for superconducting MRI magnets.

    摘要翻译： 为具有液体冷冻剂压力容器的超导磁共振成像装置的可变冷却能力低温冷却器提供系统和方法，以向磁体组件提供低温温度，围绕压力容器的真空容器和与冷冻剂压力容器间隔开的辐射屏蔽 以及位于冷冻剂压力容器压力边界内的压力传感器，用于感测压力变化。 一种控制器，用于根据冷冻剂压力容器的压力变化改变低温冷却器的除热速率，并且通过改变电力驱动（DC或AC电动机）的速度来调节低温冷却器的冷却能力，或者通过改变 恒速电力驱动与低温冷却器置换器/活塞之间的机械传动比调节气体流的冷却器振荡频率。 本发明可以适用于使用斯特林，吉福德 - 麦克马洪（“GM”）和脉冲管（“PT”）冷却器系统的磁体或非磁体系统。 该系统将延长部件寿命，为超导MRI磁体提供可控的恒定压力，提高图像质量。

    Apparatus and method for controlling a cryocooler by adjusting cooler gas flow oscillating frequency
    7.
    发明申请
    Apparatus and method for controlling a cryocooler by adjusting cooler gas flow oscillating frequency 有权
    通过调节冷却器气流振荡频率来控制低温冷却器的装置和方法

    公开(公告)号：US20060288710A1

    公开(公告)日：2006-12-28

    申请号：US11167850

    申请日：2005-06-27

    申请人： Edwin Legall ,  Mark Derakhshan ,  Longzhi Jiang ,  Roy Mangano

    发明人： Edwin Legall ,  Mark Derakhshan ,  Longzhi Jiang ,  Roy Mangano

    IPC分类号： F25B9/00 ,  F25B49/00

    CPC分类号： G05D23/1919 ,  F25B9/10 ,  F25B9/14 ,  F25B9/145 ,  F25B2309/1411 ,  F25B2309/1428 ,  F25B2400/17 ,  F25D19/00 ,  F25D19/006 ,  F25D29/00 ,  F25D2400/02

    摘要： Systems and methods are provided for a variable cooling capacity cryocooler for a superconducting magnetic resonance imaging device having a liquid cryogen pressure vessel to provide cryogenic temperatures to a magnet assembly, a vacuum vessel surrounding the pressure vessel and a radiation shield spaced from the cryogen pressure vessel, and a pressure sensor positioned inside the cryogen pressure vessel pressure boundary for sensing pressure variations. A controller for varying the heat removal rate of the cryocooler based on the pressure variations in the cryogen pressure vessel and where the cooling capacity of the cryocooler is adjusted by modifying the speed of the electric power drive (DC or AC motors) or by changing the mechanical transmission ratio between the constant speed electric power drive and the cryocooler displacer/piston to adjust the cooler oscillating frequency of the gas flow. The invention can be adapted to magnets or non magnets systems using Stirling, Gifford-McMahon (“GM”) and Pulse Tube (“PT”) cooler systems. The system will extend component end of life and provide a controllable constant pressure improving image quality for superconducting MRI magnets.

    摘要翻译： 为具有液体冷冻剂压力容器的超导磁共振成像装置的可变冷却能力低温冷却器提供系统和方法，以向磁体组件提供低温温度，围绕压力容器的真空容器和与冷冻剂压力容器间隔开的辐射屏蔽 以及位于冷冻剂压力容器压力边界内的压力传感器，用于感测压力变化。 一种控制器，用于根据冷冻剂压力容器的压力变化改变低温冷却器的除热速率，并且通过改变电力驱动（DC或AC电动机）的速度来调节低温冷却器的冷却能力，或者通过改变 恒速电力驱动与低温冷却器置换器/活塞之间的机械传动比调节气体流的冷却器振荡频率。 本发明可以适用于使用斯特林，吉福德 - 麦克马洪（“GM”）和脉冲管（“PT”）冷却器系统的磁体或非磁体系统。 该系统将延长部件寿命，为超导MRI磁体提供可控的恒定压力，提高图像质量。