公开(公告)号：US4272782A

公开(公告)日：1981-06-09

申请号：US757296

申请日：1977-01-05

Applicant: Johannes Proper ,  Jacob Schuur ,  George L. A. Monte ,  Eduard P. Westerveld

Inventor： Johannes Proper ,  Jacob Schuur ,  George L. A. Monte ,  Eduard P. Westerveld

IPC: H01J31/50 ,  H01J9/44 ,  H05G1/64 ,  H04N5/32 ,  H01J23/08 ,  H01J31/49 ,  H04N5/21

CPC classification number: H05G1/64 ,  A61B6/583

Abstract: The light which is emitted from the output screen of an image intensifier and passed through a subsequent output objective, is converted into an electrical signal by means of a photomultiplier tube or an image pick-up tube. The noise or modulation content of the electrical signal are measured. An optimum adjustment of the focussing position of the output objective and the magnitude of the focussing voltage applied to the imge intensifier, cause the noise or modulation content to attain an extreme value, e.g. a maximum. The focussing voltage and the focussing position of the output objective are iteratively adjusted.

Abstract translation: 从图像增强器的输出屏幕发射并通过随后的输出物镜的光通过光电倍增管或图像拾取管转换成电信号。 测量电信号的噪声或调制内容。 输出物镜的聚焦位置的最佳调节和施加到成像增强器的聚焦电压的幅度导致噪声或调制内容达到极限值，例如， 最大。 迭代调整输出物镜的聚焦电压和聚焦位置。

公开(公告)号：US4233539A

公开(公告)日：1980-11-11

申请号：US17316

申请日：1979-03-05

Applicant: Louis R. Falce

Inventor： Louis R. Falce

IPC: H01J19/30 ,  H01J1/36 ,  H01J1/46 ,  H01J23/02 ,  H01J23/027 ,  H01J23/08

CPC classification number: H01J23/02 ,  H01J1/36 ,  H01J1/46

Abstract: Secondary electrons emitted from an electron-collecting electrode of a vacuum tube degrade the performance. Emission of high-speed secondaries is reduced by coating the electron-collecting surface with a material of low atomic number. Emission of low-speed secondaries is a less predictable function of the surface material and structure. The invention comprises a coating of aluminum boride or similar substance, which has low secondary emission and is also easy to outgas.

Abstract translation: 从真空管的电子收集电极发射的二次电子降低了性能。 通过用原子序数低的材料涂覆电子收集表面来降低高速次级元件的发射。 低速次生的排放是表面材料和结构的一个较不可预测的功能。 本发明包括硼化铝或类似物质的涂层，其具有低的二次发射并且也易于排气。

公开(公告)号：US4194139A

公开(公告)日：1980-03-18

申请号：US936146

申请日：1978-08-23

Applicant: John A. Pasour ,  Christos A. Kapetanakos ,  Redge A. Mahaffey ,  Jeffry Golden

Inventor： John A. Pasour ,  Christos A. Kapetanakos ,  Redge A. Mahaffey ,  Jeffry Golden

IPC: H01J27/04 ,  H01J23/08 ,  H01J27/00 ,  H05H1/00

CPC classification number: H01J27/04

Abstract: A reflex tetrode device for efficiently generating intense, pulsed unidirional ion beams. The device includes two thin, semitransparent anodes spaced from a real cathode which is maintained at ground potential. The first anode is spaced from and faces the real cathode. The second anode is spaced a short distance from the first anode and a virtual cathode is formed beyond the second anode when a sufficiently high electron current flows from the real cathode and through the anodes. The anodes are ring-like or disc-like structures secured to the edges of a support member with their planes perpendicular to the axis of the device between the real and virtual cathodes. The anode structure (i.e., the support member together with the two anodes) is connected to a pulsed high-voltage generator which is operated in positive polarity. Consequently, both anodes are at the same positive potential. The first anode, because of its material, does not readily form an ionic plasma when electrons pass through it, but the second anode does.

Abstract translation: 用于有效产生强脉冲单向离子束的反射四极管装置。 该器件包括两个与保持在地电位的真正阴极间隔的薄的半透明阳极。 第一阳极与真阴极间隔开并面对真阴极。 第二阳极与第一阳极隔开一短距离，并且当足够高的电子电流从真实阴极流过阳极并通过阳极时，形成超过第二阳极的虚拟阴极。 阳极是固定到支撑构件的边缘的环状或圆盘状结构，其平面垂直于在真实阴极和虚拟阴极之间的装置的轴线。 阳极结构（即，支撑构件与两个阳极一起）连接到正极性操作的脉冲高压发生器。 因此，阳极都处于相同的正电位。 第一阳极由于其材料，当电子通过它时不容易形成离子等离子体，而是第二阳极。

公开(公告)号：US4145635A

公开(公告)日：1979-03-20

申请号：US847857

申请日：1977-11-02

Applicant: Richard A. Tuck

Inventor： Richard A. Tuck

IPC: H01J23/06 ,  H01J1/304 ,  H01J3/02 ,  H01J23/08

CPC classification number: H01J1/304

Abstract: An electron emitter comprises field emitter zones formed by projections of field emissive material separated by regions which are not field emissive. An extractor electrode for applying an electric field to the projections and a focus electrode have openings aligned with the emitter zones and material particles aligned with the non-emissive regions. The electrodes form, when suitably energised electron focussing fields to focus electrons emitted from the zones.

Abstract translation: 电子发射器包括由不是场发射的区域分开的场发射材料的突起形成的场发射极区。 用于向突起施加电场的提取电极和聚焦电极具有与发射区对准的开口和与非发射区对准的材料颗粒。 当适当激励电子聚焦场合以聚焦从区域发射的电子时，电极形成。

公开(公告)号：US3963955A

公开(公告)日：1976-06-15

申请号：US460860

申请日：1974-04-15

Applicant: George V. Miram ,  Gordon T. Hunter

Inventor： George V. Miram ,  Gordon T. Hunter

IPC: H01J3/02 ,  H01J23/065 ,  H01J23/08

CPC classification number: H01J23/065 ,  H01J3/026

Abstract: A method and apparatus for preventing oscillations in high-current electron guns. Spurious oscillations frequently occur as a result of interaction of the electron stream with the fields of resonant modes of the gun structure. The resonant impedances of the modes are lowered by damping with lossy dielectric or resistive materials which are suited to the high temperature and vacuum environment of electron guns. The lossy materials are located in places shielded from high electric fields applied to the gun. Lossy dielectric materials which are D.C. insulators may be used as insulating supports for gun electrodes.

公开(公告)号：US3885192A

公开(公告)日：1975-05-20

申请号：US44288474

申请日：1974-02-15

Applicant: ENGLISH ELECTRIC VALVE CO LTD

Inventor： ESTERSON MAURICE ,  KING ROBIN CHARLES MOOREHOUSE ,  GREGORY JOHN FREDERICK

IPC: H01J23/087 ,  H01J23/08

CPC classification number: H01J23/0873

Abstract: A fundamental coupled cavity travelling wave tube including between electron gun and collector a stack of apertured plates assembled to provide a series of successive cavities coupled for the fundamental mode of operation and in which there is a magnetic pole piece at each nth cavity (n is an integer greater than unity), constituted by a relatively thick apertured ferromagnetic plate between two thinner ferro-magnetic apertured plates, the thinner plates extending the magnetic path provided by the thicker plate towards the electron beam path.

Abstract translation: 基本耦合的空腔行波管包括电子枪和集电器之间的一组有孔的板，其组装成提供一系列连续的空腔，用于基本工作模式，并且其中在每个第n个腔处有一个磁极片（n是一个 大于1的整数），由较薄的铁磁多孔板之间的相对较厚的有孔铁磁板构成，较薄的板将较厚板提供的磁路延伸到电子束路径。

公开(公告)号：US3683235A

公开(公告)日：1972-08-08

申请号：US3683235D

申请日：1970-07-17

Applicant: EMI LTD

Inventor： PHILLIPS GRAHAM ,  PERRING DUDLEY

IPC: H01J23/083 ,  H01J25/20 ,  H01J23/08

CPC classification number: H01J23/083 ,  H01J25/20

Abstract: An electron discharge device includes a cathode for producing electrons, a target for collecting said electrons and an electron focusing system for focusing the electrons from said cathode into a beam directed to said target. The focusing system includes a member having an aperture for the passage of the beam and a charge retaining surface surrounding said aperture on which in operation of the tube unfocused electrons from said cathode impinge, said surface having such a coefficient of secondaryelectron emission for the energy of the cathode electrons under the rated operated conditions of the device that unfocused electrons tend to cause said surface to charge to a potential which will focus said electrons to pass through said aperture.

Abstract translation: 电子放电装置包括用于产生电子的阴极，用于收集所述电子的靶和用于将来自所述阴极的电子聚焦到指向所述靶的光束的电子聚焦系统。 聚焦系统包括具有用于光束通过的孔的构件和围绕所述孔的电荷保持表面，其中在管的操作中，未将来自所述阴极的电子聚焦，所述表面具有这样的二次电子发射系数 在未被聚焦的电子的器件的额定工作条件下阴极电子的能量倾向于使所述表面充电到将使所述电子聚焦通过所述孔的电位。

公开(公告)号：US3665242A

公开(公告)日：1972-05-23

申请号：US3665242D

申请日：1970-07-01

Applicant: PHILIPS CORP

Inventor： DUBRAVEC VLADIMIR

IPC: H01J23/087 ,  H01J23/08

CPC classification number: H01J23/0873

Abstract: A permanent magnetic focusing device for periodically guiding the electron beams of multicavity klystrons comprising axially arranged magnets that are radially magnetized in the same sense.

公开(公告)号：US3522469A

公开(公告)日：1970-08-04

申请号：US3522469D

申请日：1968-04-12

Applicant: VARIAN ASSOCIATES

Inventor： MIRAM GEORGE V

IPC: H01J23/06 ,  H01J23/065 ,  H01J23/087 ,  H01J25/34 ,  H01J23/08

CPC classification number: H01J23/087 ,  H01J23/065

公开(公告)号：US3483419A

公开(公告)日：1969-12-09

申请号：US3483419D

申请日：1967-12-18

Applicant: VARIAN ASSOCIATES

Inventor： LUEBKE WILLIAM R

IPC: H01J23/083 ,  H01J23/15 ,  H01J23/08

CPC classification number: H01J23/15 ,  H01J23/083