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    Microwave electron gun
    102.
    发明授权
    Microwave electron gun 失效
    微波电子枪

    公开(公告)号：US4641103A

    公开(公告)日：1987-02-03

    申请号：US632757

    申请日：1984-07-19

    Applicant: John M. J. Madey ,  Glen A. Westenskow

    Inventor： John M. J. Madey ,  Glen A. Westenskow

    IPC: H05H9/00 ,  H01J3/02 ,  H01J23/06 ,  H01J23/16 ,  H01J23/34 ,  H01J25/00 ,  H01J25/10 ,  H01J25/12 ,  H01J29/54 ,  H01J29/70 ,  H01J29/76 ,  H01J40/00 ,  H05H7/18 ,  H01J29/58 ,  H01J29/80 ,  H01J29/84

    CPC classification number: H05H7/18 ,  H01J23/06 ,  H01J3/02

    Abstract: An electron gun (10) that suppresses the non-linear space charge forces and phase-dependant focusing forces that are chiefly responsible for the high emittance of conventional electron guns. The gun comprises a resonant microwave cavity (15), a cathode (12) mounted in the cavity wall, and a momentum analyzer system (17). The resonant microwave cavity, when supplied with microwave power, supports an electromagnetic field having a high-gradient electric component directed along an acceleration axis. The cavity is formed with an exit aperture (32) at a location relative to the cathode such that emitted electrons are accelerated along the axis and pass through the exit aperture. The cavity length is chosen to allow the microwave field within the cavity volume to accelerate the electrons to an energy of about 0.5-1.0 MeV prior to the electrons' passing through the aperture. Bunching is provided by the momentum analyzer. An electron emerging from the cavity has an energy determined by the phase of the microwave field at the time of that electron's emission. Those electrons having energies corresponding to the desired initial phase value are permitted to pass through the momentum analyzer, thereby forming a prebunched electron beam for injection into a linear accelerator.

    Abstract translation: 一种电子枪（10），其抑制主要负责常规电子枪高发射率的非线性空间电荷力和相位聚焦力。 枪包括谐振微波腔（15），安装在空腔壁中的阴极（12）和动量分析器系统（17）。 当提供微波功率时，谐振微波腔支持具有沿着加速轴指向的高梯度电气分量的电磁场。 空腔在相对于阴极的位置处形成有出口孔（32），使得发射的电子沿轴线被加速并穿过出口孔。 腔体长度被选择为允许空腔体积内的微波场在电子通过孔之前将电子加速到约0.5-1.0MeV的能量。 冲击由动量分析仪提供。 从空腔出射的电子具有由电子发射时的微波场的相位决定的能量。 具有对应于期望的初始相位值的能量的那些电子被允许通过动量分析器，由此形成用于注入的线性加速器的预先轰击的电子束。

    Repetitively pumped electron beam device
    103.
    发明授权
    Repetitively pumped electron beam device 失效
    重复抽电子束装置

    公开(公告)号：US4162432A

    公开(公告)日：1979-07-24

    申请号：US868638

    申请日：1978-01-11

    Applicant: Leland G. Schlitt

    Inventor： Leland G. Schlitt

    IPC: H01J3/02 ,  H01S3/0959 ,  H01S3/09

    CPC classification number: H01S3/0959 ,  H01J3/02

    Abstract: Apparatus for producing fast, repetitive pulses of controllable length of an electron beam by phased energy storage in a transmission line of length matched to the number of pulses and specific pulse lengths desired.

    Abstract translation: 用于通过在与所需脉冲数和特定脉冲长度相匹配的长度匹配的传输线中的相位储能来产生电子束可控长度的快速重复脉冲的装置。

    Electron beam producing system for very high acceleration voltages and beam powers
    104.
    发明授权
    Electron beam producing system for very high acceleration voltages and beam powers 失效
    电子束产生系统，用于非常高的加速电压和光束功率

    公开(公告)号：US3906280A

    公开(公告)日：1975-09-16

    申请号：US37258273

    申请日：1973-06-22

    Applicant: MAX PLANCK GESELLSCHAFT

    Inventor： ANDELFINGER CLAUS ,  DOMMASCHK WALTER ,  OTT WERNER ,  ULRICH MANFRED ,  WEBER GERMAN

    IPC: H01J3/02 ,  H01J5/06 ,  H01J29/46

    CPC classification number: H01J5/06 ,  H01J3/02

    Abstract: An electron beam producing system for acceleration voltages in the order of magnitude of megavolts and beam powers in the order of magnitude of gigawatts, comprises a tubular housing of insulating material, in which adjacent to its one closed end a field emission cathode with a large surface area is arranged while at its other end, from which the electron beam emerges, an annular anode is arranged. A device serves for collimating the electrons emitted by the cathode to form a collimated electron beam. The device for collimating the electron consists of annular electrodes, which respectively comprise a part adjacent to their center opening and an outer part which is held on the housing and has a radial electrical passage extending towards the outside of the housing. The inner part of the electrode lying closest to the cathode has at least approximately the shape of a frusto-conical surface which tapers towards the cathode; in that the inner part of the remaining electrodes is flat or at least approximately frusto-conical and respectively lies in an equipotential surface of an electric field, which collimates the electrons, emitted by the cathode, to form a parallel beam. The housing is surrounded by a coaxial insulating casing with a clearance. The intermediate space between the outer surface of the housing and the casing is surrounded with an electrically conducting liquid with a relatively high specific resistance and at the axial ends has a respective connection electrode, which makes contact with the liquid, for the operating voltage and that the outer parts of the electrodes are so shaped that the radial passages end at those sites of the liquid filled intermediate space at which the fraction, provided for the relevant electrode, of the operating voltage obtains when the operating voltage is applied to the connection electrodes.

    Abstract translation: 用于加速电压的电子束产生系统，其兆伏数量级和兆瓦级数量级的光束功率的数量级包括绝缘材料的管状壳体，其中与其一个封闭端相邻的具有大表面的场致发射阴极 区域被布置，而在另一端，电子束从其出来，布置有环形阳极。 器件用于准直由阴极发射的电子以形成准直的电子束。 用于准直电子的装置由环形电极构成，环形电极分别包括与其中心开口相邻的部分和外部部分，该外部部分保持在壳体上并且具有朝壳体外部延伸的径向电气通道。 最靠近阴极的电极的内部部分至少具有朝向阴极逐渐变细的截头圆锥形表面的形状; 其中剩余电极的内部部分是平坦的或至少大致截头圆锥形的，并且分别位于电场的等电位表面中，该电场准直由阴极发射的电子，以形成平行光束。 外壳由具有间隙的同轴绝缘外壳包围。 壳体外表面与壳体之间的中间空间被具有较高电阻率的导电液体包围，轴向端部具有与液体接触的相应连接电极，用于工作电压， 电极的外部部分被成形为使得径向通道在液体填充的中间空间的那些位置处终止，在该位置处，当向连接电极施加工作电压时，提供给相关电极的部分获得工作电压。

    Electrostatic collector for charged particles
    106.
    发明授权
    Electrostatic collector for charged particles 失效
    收集颗粒的静电收集器

    公开(公告)号：US3702951A

    公开(公告)日：1972-11-14

    申请号：US3702951D

    申请日：1971-11-12

    Applicant: NASA

    Inventor： KOSMAHL HENRY G

    IPC: H01J3/02 ,  H01J23/027 ,  H01J23/02

    CPC classification number: H01J3/02 ,  H01J23/0275

    Abstract: A charged particle collector comprising a stack of apertured electrode plates which lie within an imaginary sphere is provided. The plate closet to a charged particle emitter forms a portion of the imaginary sphere and is at zero volts potential with respect to the emitter. The plate farthest away from the charged particle emitter is of conical shape with the apex pointing toward the emitter and includes a spike extending toward the emitter. The conical plate has either a negative or positive potential with respect to the emitter, depending on whether the charged particles are negative or positive. A plurality of intermediate apertured electrode plates are positioned between the plate which forms a portion of the sphere and the conical plate, each of the plates being at a slightly lower potential than the preceding plate moving in a direction toward the emitter. These intermediate plates approximate the shape of an equipotential line which would be plotted for the particular voltage applied to the plate.

    Abstract translation: 提供一种带电粒子收集器，其包括位于虚拟球体内的多孔电极板堆叠。 带电粒子发射器的平板箱形成虚拟球体的一部分并且相对于发射器处于零伏特电位。 距离带电粒子发射器最远的板是圆锥形的，顶点指向发射器，并且包括朝向发射器延伸的尖峰。 锥形板相对于发射器具有负电势或正电位，取决于带电粒子是负极还是正极。 多个中间多孔电极板位于形成球体的一部分的板和锥形板之间，每个板的电位低于在朝向发射极的方向上移动的前一板的电位。 这些中间板接近等电位线的形状，该等电位线将针对施加到该板的特定电压进行绘制。

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