公开(公告)号：US20180286622A1

公开(公告)日：2018-10-04

申请号：US15762874

申请日：2016-09-16

申请人： NEC NETWORK AND SENSOR SYSTEMS, LTD.

发明人： Yukihira NAKAZATO ,  Eiji FUJIWARA

IPC分类号： H01J23/34 ,  H01J23/04 ,  H01J23/06 ,  H01J23/027

CPC分类号： H01J23/34 ,  H01J23/027 ,  H01J23/04 ,  H01J23/06 ,  H01J23/065 ,  H01J23/087

摘要： The purpose is to make it possible to autonomously suppress a reduction in an electron beam without providing a means for supervising the electron beam intensity of a monitor or the like. An electron gun, provided with: a heater (12) in which one terminal serves as a heater terminal (H) and the other terminal serves as a shared terminal (HK), and in which a low-voltage power supply (21) is connected between the terminals, the heater (12) generating heat due to a current being supplied from the low-voltage power supply (21); and a cathode electrode (11) connected to the shared terminal (HK) and heated by the heater (12) to discharge thermal electrons. A cathode current (Ik) due to the thermal electrons discharged from the cathode electrode (11), and a current (Ih) due to the low-voltage power supply, flow in opposite directions through the heater (12).

公开(公告)号：US20170140892A1

公开(公告)日：2017-05-18

申请号：US15319845

申请日：2015-06-26

申请人： NEC Network and Sensor Systems, Ltd.

发明人： Takatsugu MUNEHIRO

IPC分类号： H01J23/087 ,  H01J23/065 ,  H01J23/027 ,  H01J23/04

CPC分类号： H01J23/087 ,  H01J23/027 ,  H01J23/04 ,  H01J23/06 ,  H01J23/065 ,  H01J23/0873 ,  H01J23/34 ,  H01J25/34 ,  H01J25/42

摘要： Provided are a traveling wave tube and a high-frequency circuit system such that the product life span of the traveling wave tube operating in multiple modes can be extended while variations in gain and amplification efficiency that accompany switching of the operation modes can be suppressed. The traveling wave tube comprises: an electron gun equipped with a cathode that releases electrons, and a heater that provides the cathode with heat energy for releasing the electrons; a helix causing an RF signal to interact with an electron beam formed from the electrons released by the electron gun; a collector for catching the electron beam emitted by the helix; an anode whereby the electrons released from the electron gun are guided into the helix; and a magnetic field application device for generating a magnetic field in order to change the diameter of the electron beam, said magnetic field application device being supplied with electric power for generating the magnetic field from the outside.

公开(公告)号：US5767625A

公开(公告)日：1998-06-16

申请号：US632589

申请日：1996-04-15

申请人： Merrald B. Shrader ,  Andrew A. Haase

发明人： Merrald B. Shrader ,  Andrew A. Haase

IPC分类号： H01J25/00 ,  H01J23/00 ,  H01J23/065 ,  H01J23/12 ,  H01J23/14 ,  H01J23/207 ,  H01J23/36 ,  H01J23/46 ,  H01J23/54 ,  H01J25/04 ,  H01J25/02

CPC分类号： H01J23/12 ,  H01J23/005 ,  H01J23/065 ,  H01J23/14 ,  H01J23/207 ,  H01J23/36 ,  H01J23/54 ,  H01J25/04

摘要： A vacuum tube for handling an r.f. signal having a predetermined frequency range comprises a cathode, a heater, and a non-electron emissive grid. The grid is positioned from the cathode by the distance an emitted electron from the cathode can travel in a quarter cycle of the r.f. signal. Outer and inner metal tubes forming a resonant line of a signal coupler are respectively connected to the grid and cathode. R.F. absorbers absorb r.f. fields in an interaction region between an anode and the grid. In one embodiment a coupling loop is between metal tubes at an end of the tubes spaced n.lambda./4 from the grid and cathode. In a second embodiment the coupler includes a coaxial line having an inner conductor connected to a first metal face, spaced from a second opposed metal face by a solid dielectric. An outer conductor is connected to a third metal face, spaced from a fourth opposed metal face by the dielectric. The third and fourth faces surround the first and second faces. The first and third faces are at ground potential while the second and fourth faces are at high negative DC voltages. The second and fourth faces are respectively at common ends of interior and exterior coaxial metal tubes forming a .lambda./2 coupler. Hollow inductive structures extend between the inner and outer metal tubes and at different locations along the tubes. Bias leads may be inserted into the inductive structures for shielding.

摘要翻译： 一个用于处理r.f.的真空管 具有预定频率范围的信号包括阴极，加热器和非电子发射栅格。 栅极从阴极定位发射的电子从阴极可以在r.f的四分之一周期内行进的距离。 信号。 形成信号耦合器的谐振线路的外部和内部金属管分别连接到栅极和阴极。 R.F. 吸收体吸收r.f. 在阳极和栅格之间的相互作用区域中的场。 在一个实施例中，耦合回路位于与栅极和阴极间隔开nλ/ 4的管的端部处的金属管之间。 在第二实施例中，耦合器包括同轴线，其具有连接到第一金属面的内部导体，通过固体电介质与第二相对的金属表面间隔开。 外部导体连接到第三金属表面，通过电介质与第四相对的金属表面间隔开。 第三和第四面围绕第一和第二面。 第一和第三面处于接地电位，而第二和第四面处于高负的直流电压。 第二和第四面分别在形成λ/ 2耦合器的内部和外部同轴金属管的共同端部。 空心电感结构在内金属管和外金属管之间以及沿着管的不同位置延伸。 偏置引线可以插入到用于屏蔽的感应结构中。

公开(公告)号：US5694005A

公开(公告)日：1997-12-02

申请号：US528036

申请日：1995-09-14

申请人： Dan M. Goebel

发明人： Dan M. Goebel

IPC分类号： H01J23/065 ,  H01J23/087 ,  H01J25/00 ,  H01J25/38 ,  H03F3/54 ,  H01P23/24

CPC分类号： H01J25/005 ,  H01J23/065 ,  H01J23/087 ,  H01J25/38

摘要： The invention is directed to the reduction of an electron beam transport problem during microwave generation in plasma-assisted microwave sources. A small, e.g.,

摘要翻译： 本发明涉及在等离子体辅助微波源的微波产生期间减少电子束传输问题。 一个小的例如<200高斯二次磁场与源的慢波结构（SWS）相关联地定位，以减少源电子束中的电子束的径向发散。 次级磁场对发散电子施加径向力以补充初级磁场的径向力和静电场的径向力。 初级磁场是由电子束中的电子运动产生的，而静电场是由电子束通过等离子体辅助源中的可离子化气体而产生的离子产生的。 辅助磁场的添加可以用定位成引导其磁场的至少一部分通过SWS的通道的线圈来实现。

公开(公告)号：US5399935A

公开(公告)日：1995-03-21

申请号：US78825

申请日：1993-06-21

申请人： Noel Santonja ,  Pierre-Yves Chabaud

发明人： Noel Santonja ,  Pierre-Yves Chabaud

IPC分类号： H01J23/04 ,  H01J23/065

CPC分类号： H01J23/065 ,  H01J23/04

摘要： An electron gun comprises a cathode made of an emissive material with an active face emitting electrons through a control grid that is placed before the active face but has no contact with it. The active face has emissive zones and non-emissive zones. The non-emissive zones are formed by grooves hollowed out of the emissive material. The control grid has solid parts that directly face the grooves. Application to electron guns with reduced heating of the control grid. FIG. 5 .

摘要翻译： 电子枪包括由发射材料制成的阴极，其具有通过控制栅格发射电子的主动面，该控制栅极放置在有源面之前但不与其接触。 主动面具有发射区和非发射区。 非发光区域由从发光材料中挖出的凹槽形成。 控制网格具有直接面向凹槽的实心部件。 应用于控制电网加热的电子枪。 图。 5。

公开(公告)号：US4583021A

公开(公告)日：1986-04-15

申请号：US485780

申请日：1983-04-18

申请人： Ronald W. Herriott ,  Johann R. Hechtel

发明人： Ronald W. Herriott ,  Johann R. Hechtel

IPC分类号： H01J23/06 ,  H01J23/065 ,  H01J1/46 ,  H01J21/10

CPC分类号： H01J23/065

摘要： An improved electron gun is shown with a cathode having a smooth, concaved surface and a grooved pattern therein which matches, and is aligned with, the pattern of a shadow grid placed immediately before the cathode surface so that the outer, larger radius of curvature of the shadow grid closest to the cathode is substantially identical and concentric with the radius of curvature of the smooth, concave cathode surface. Beyond the shadow grid is a control grid which controls the flow of electrons emitted from the cathode toward an anode. The grooves which form the pattern within the cathode surface have tapered side walls and rounded outer and inner corners to improve the flow of emitted electrons and facilitate manufacture.

摘要翻译： 示出了一种改进的电子枪，其阴极具有平滑的凹面和沟槽图案，其中阴极表面与阴极表面之前放置的阴影栅格的图案相匹配并与其对准，使得外部较大的曲率半径 最靠近阴极的阴影栅格与光滑凹入阴极表面的曲率半径基本相同并且同心。 阴影网格之外是控制栅极，其控制从阴极向阳极发射的电子的流动。 在阴极表面内形成图案的凹槽具有锥形侧壁和圆角的外角和内角，以改善发射电子的流动并促进制造。

公开(公告)号：US4321505A

公开(公告)日：1982-03-23

申请号：US140073

申请日：1980-04-14

申请人： George V. Miram ,  Gerhard B. Kuehne

发明人： George V. Miram ,  Gerhard B. Kuehne

IPC分类号： H01J1/46 ,  H01J3/02 ,  H01J23/065 ,  H01J29/46

CPC分类号： H01J23/065 ,  H01J1/46 ,  H01J3/029

摘要： A gun for a linear-beam electron tube has a control grid for modulating the beam current which consists of an array of conductive web elements whose spacing from each other is much larger than their spacing from the concave emissive surface of the cathode. It was found that when this condition is met the grid can be operated at cathode potential while beam current is being drawn without distorting the electric accelerating field enough to ruin the focusing of the beam. Thus, when the grid is used to pulse the beam current on and off, it can have zero bias in the "on" condition, whereby the pulse modulator can be greatly simplified.

摘要翻译： 用于线性束电子管的枪具有用于调制束电流的控制栅格，该栅极电流由导电网状元件阵列组成，它们彼此的间隔比它们与阴极的凹形发射表面的间隔大得多。 已经发现，当满足这种条件时，栅极可以在阴极电位下操作，而束电流被拉伸而不使电加速场扭曲到足以破坏光束的聚焦。 因此，当栅格用于脉冲束电流通/断时，它可以在“导通”状态下具有零偏置，从而可以大大简化脉冲调制器。

公开(公告)号：US3963955A

公开(公告)日：1976-06-15

申请号：US460860

申请日：1974-04-15

申请人： George V. Miram ,  Gordon T. Hunter

发明人： George V. Miram ,  Gordon T. Hunter

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

CPC分类号： H01J23/065 ,  H01J3/026

摘要： 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：US3843902A

公开(公告)日：1974-10-22

申请号：US43967474

申请日：1974-02-04

申请人： VARIAN ASSOCIATES

发明人： MIRAM G ,  KUEHNE G

IPC分类号： H01J3/02 ,  H01J23/065 ,  H01J1/48 ,  H01J1/94 ,  H01J19/48

CPC分类号： H01J3/029 ,  H01J3/026 ,  H01J23/065

摘要： A gridded convergent flow electron gun employs a dimpled oxide coated thermionic cathode emitter facing a centrally apertured accelerating anode. A multiapertured control grid is interposed in the space between the dimpled oxide coated cathode and the anode for pulsing the electron beam. A multiapertured shadow grid is disposed overlaying the emitting surface of the cathode emitter with the apertures of the shadow grid being in alignment and in registration with the respective dimpled areas of the emitter and the corresponding apertures in the control grid for projecting a multiplicity of non-intercepting convergent flow beamlets through the individual holes in the control grid. The shadow grid is placed in nominal contact with the cathode emitter and is made of a material having essentially the same coefficient of thermal expansion as the cathode. In a preferred embodiment, the cathode includes a nickel base member and the shadow grid is made of nickel.

摘要翻译： 网格收敛流电子枪采用面向中心多孔加速阳极的凹凸氧化物涂层热电子阴极发射体。 多孔化控制栅格插入在凹凸氧化物涂覆的阴极和阳极之间的空间中，用于脉冲电子束。 多个投影的阴影栅格被布置为覆盖阴极发射器的发射表面，其中阴影栅格的孔对准并与发射器的相应的凹坑区域对准，并且控制栅格中的相应孔径突出， 拦截收敛流束通过控制网格中的各个孔。 阴影栅格被放置为与阴极发射体标称接触，并且由具有与阴极基本相同的热膨胀系数的材料制成。 在优选实施例中，阴极包括镍基构件，阴影栅格由镍制成。

公开(公告)号：US3522469A

公开(公告)日：1970-08-04

申请号：US3522469D

申请日：1968-04-12

申请人： VARIAN ASSOCIATES

发明人： MIRAM GEORGE V

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

CPC分类号： H01J23/087 ,  H01J23/065