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    Method for optimizing the magnetic field of a periodic permanent magnet focusing device
    12.
    发明授权
    Method for optimizing the magnetic field of a periodic permanent magnet focusing device 失效
    用于优化周期性永久磁铁聚焦装置的磁场的方法

    公开(公告)号：US6002988A

    公开(公告)日：1999-12-14

    申请号：US1328

    申请日：1997-12-30

    Applicant: David Riley Whaley ,  Carter Michael Armstrong

    Inventor： David Riley Whaley ,  Carter Michael Armstrong

    IPC: H01F7/02 ,  H01J3/24 ,  H01J23/087 ,  H01J37/14 ,  H05H7/04 ,  H05H9/02 ,  H01J23/08

    CPC classification number: H01J3/24 ,  H01J37/14 ,  H05H7/04

    Abstract: In accordance with the present invention, there is provided a method of profiling a total vector potential field of a periodic permanent magnetic field structure, wherein desired elements of the total vector potential field are known. The magnetic field structure comprises a plurality of magnets having individual vector potential fields which collectively form the total vector potential field. The method provides for using an electromagnetic solver to generate data files representative of each individual magnet's contribution to the total vector potential field. Such data files are generated by assuming a magnetization value of one unit for a selected magnet, setting magnetization values of zero for all other magnets, setting the electromagnetic solver to use high resolution proximate the selected magnet and to use low resolution elsewhere, using the electromagnetic solver to compute the individual vector potential fields for all space for which the total vector potential field is to be profiled, and repeating such steps for each magnet of the plurality of magnets to generate the data files. The method further provides for using the data files to determine magnetization values for each magnet necessary to provide the desired elements of the total vector potential field, and using the determined magnetization values to superimpose the individual vector potential fields to determine the total vector potential field.

    Abstract translation: 根据本发明，提供了一种对周期性永久磁场结构的总矢量势场进行轮廓分析的方法，其中已知总矢量势场的期望要素。 磁场结构包括具有共同形成总矢量势场的单个矢量势场的多个磁体。 该方法提供使用电磁解算器来生成代表每个磁体对总向量势场的贡献的数据文件。 这样的数据文件是通过为所选择的磁体假设一个单位的磁化值，为所有其它磁体设定磁化值0来设置的，将电磁解算器设置为使用选定磁体附近的高分辨率，并在其他地方使用低分辨率，使用电磁 求解器来计算要对其进行轮廓的总向量势场的所有空间的各向量势场，并且对于多个磁体中的每个磁体重复这样的步骤以生成数据文件。 该方法进一步提供使用数据文件来确定提供总向量势场的期望元素所必需的每个磁体的磁化值，并且使用确定的磁化值来叠加各个矢量势场以确定总向量势场。

    Electron source with light shutter device
    14.
    发明授权
    Electron source with light shutter device 失效
    电子源与光快门装置

    公开(公告)号：US6002207A

    公开(公告)日：1999-12-14

    申请号：US676854

    申请日：1996-07-03

    Applicant: John Beeteson ,  Andrew Knox

    Inventor： John Beeteson ,  Andrew Knox

    IPC: B41J2/447 ,  H01J3/24 ,  H01J29/46 ,  H01J29/68 ,  H01J40/18

    CPC classification number: B41J2/4476 ,  H01J29/46 ,  H01J29/68 ,  H01J3/24

    Abstract: An electron source includes a photocathode (20) for emitting electrons on excitation by incident light radiation. A permanent magnet (60) is perforated by a plurality of channels extending between opposite poles of the magnet (60). The magnet (60) generates, in each channel, a magnetic field which forms electrons received from the photocathode (20) into an electron beam for guidance towards a target (90). A shutter device (22) is provided having an array of addressable shutter elements, each selectively actuable to alternately admit and block passage of light radiation onto the photocathode (20) in response to an address signal.

    Abstract translation: 电子源包括用于通过入射光辐射激发而发射电子的光电阴极（20）。 永磁体（60）由在磁体（60）的相对极之间延伸的多个通道穿孔。 磁体（60）在每个通道中产生形成从光电阴极（20）接收的电子的电磁场，用于朝向目标（90）引导的电子束。 一种快门装置（22），其具有可寻址快门元件的阵列，每个快门元件可响应于地址信号选择性地致动以交替地允许和阻止光辐射到光电阴极（20）上的通过。

    Magnetic matrix display device using orthogonal conductors
    15.
    发明授权
    Magnetic matrix display device using orthogonal conductors 失效
    使用正交导体的磁矩阵显示装置

    公开(公告)号：US5929828A

    公开(公告)日：1999-07-27

    申请号：US695857

    申请日：1996-08-09

    Applicant: John Beeteson ,  Shaun Kerigan ,  Andrew Knox

    Inventor： John Beeteson ,  Shaun Kerigan ,  Andrew Knox

    IPC: B41J2/447 ,  G09G1/20 ,  G09G3/22 ,  H01J3/02 ,  H01J3/24 ,  H01J29/46 ,  H01J29/68 ,  H01J31/12

    CPC classification number: B41J2/4476 ,  G09G1/20 ,  G09G3/22 ,  H01J29/46 ,  H01J29/68 ,  H01J3/02 ,  H01J3/24 ,  H01J2329/00

    Abstract: A display system comprises a display screen including a matrix of display elements and a permanent magnet having an array of channels formed therein. Each channel corresponds to a different display element. Each display element comprises a phosphor target, an electron source and a device for controlling flow of electrons from the source through the corresponding channel in the magnet onto the target. Addressing device comprises first and second orthogonal conductors defining a grid. Each display element is located at the intersection of a different pair of first and second conductors. Each first conductor is connected to a first control electrode of the control device of each display element in a corresponding line of display elements and each second conductor is connected to a second control electrode of the control device of each display element in a corresponding line of display elements.

    Abstract translation: 显示系统包括包括显示元件的矩阵的显示屏和具有形成在其中的通道阵列的永磁体。 每个通道对应于不同的显示元件。 每个显示元件包括荧光体靶，电子源和用于控制电子从源通过磁体中的相应通道到目标上的流动的装置。 寻址装置包括限定网格的第一和第二正交导体。 每个显示元件位于不同对的第一和第二导体的交叉处。 每个第一导体连接到显示元件的相应行中的每个显示元件的控制装置的第一控制电极，并且每个第二导体在相应的显示器线路中连接到每个显示元件的控制装置的第二控制电极 元素。

    Periodic permanent magnet structure with increased useful field
    17.
    再颁专利
    Periodic permanent magnet structure with increased useful field 失效

    公开(公告)号：USRE33736E

    公开(公告)日：1991-11-05

    申请号：US578177

    申请日：1990-08-30

    Applicant: John P. Clarke

    Inventor： John P. Clarke

    IPC: H01F7/02 ,  H01J3/24 ,  H01J23/087

    CPC classification number: H01F7/0278 ,  H01J23/0873 ,  H01J3/24

    Abstract: A device is disclosed which uses permanent magnets to manipulate charged ticle beams, such as those employed in traveling wave tubes, wigglers, and undulators. Tapered pole pieces are inserted between magnets in a periodic permanent magnet array, and the taper is oriented away from the beam path. The magnets themselves may also be tapered, but the taper is oriented toward the beam path. Tapering is described according to the cross sections formed when the plane which contains the beam path intersects the magnets and pole pieces.

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