公开(公告)号：US20240006142A1

公开(公告)日：2024-01-04

申请号：US18064280

申请日：2022-12-11

申请人： SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

发明人： Ruiying SONG ,  Peng CHENG

IPC分类号： H01J3/02 ,  H01J1/02

CPC分类号： H01J3/029 ,  H01J1/025

摘要： An electron gun may include a cathode with an emitting surface configured to emit electrons. The cathode may include a through hole that goes through the emitting surface and is configured to allow back-streaming electrons of the emitted electrons to pass through. The electron gun may also include an anode configured to attract the emitted electrons from the cathode to the anode and focus the emitted electrons into an electron beam. The electron gun may also include a grid structure configured to facilitate the focusing of the emitted electrons, the grid structure being positioned corresponding to the through hole.

公开(公告)号：US09455112B2

公开(公告)日：2016-09-27

申请号：US14578525

申请日：2014-12-22

申请人： MAPPER LITHOGRAPHY IP B.V

发明人： Laura Dinu-Gürtler ,  Eric Petrus Hogervorst

IPC分类号： H01J29/04 ,  H01J1/15 ,  G03F7/20 ,  H01J37/075 ,  H01J37/317 ,  H01J1/28 ,  H01J3/02

CPC分类号： H01J37/3174 ,  G03F7/70058 ,  H01J1/15 ,  H01J1/28 ,  H01J3/027 ,  H01J3/029 ,  H01J37/075 ,  H01J37/3177 ,  H01J2229/481 ,  H01J2237/061

摘要： The invention relates to a cathode arrangement comprising: a thermionic cathode comprising an emission portion provided with an emission surface for emitting electrons, and a reservoir for holding a material, wherein the material, when heated, releases work function lowering particles that diffuse towards the emission portion and emanate at the emission surface at a first evaporation rate; a focusing electrode comprising a focusing surface for focusing the electrons emitted from the emission surface of the cathode; and an adjustable heat source configured for keeping the focusing surface at a temperature at which accumulation of work function lowering particles on the focusing surface is prevented.

公开(公告)号：US20140077077A1

公开(公告)日：2014-03-20

申请号：US13618760

申请日：2012-09-14

申请人： Xinrong JIANG ,  Liqun HAN

发明人： Xinrong JIANG ,  Liqun HAN

IPC分类号： G21K5/04 ,  H01J27/02 ,  H01J37/28

CPC分类号： H01J37/063 ,  H01J3/029 ,  H01J3/08 ,  H01J37/09 ,  H01J2237/0458 ,  H01J2237/30472

摘要： One embodiment relates to an electron beam apparatus which includes a dual-lens electron gun for emitting an electron beam. The electron beam is a high beam-current electron beam in a first operating mode and a low beam-current electron beam in a second operating mode. The apparatus further includes a column aperture which is out of the path of the high beam-current electron beam in the first operating mode and is centered about an optical axis of the electron beam apparatus in the second operating mode. Another embodiment relates to an electron gun which includes a first gun lens, a beam limiting aperture, and a second gun lens. The first gun lens focuses the electrons before they pass through the beam-limiting aperture while the second gun lens focuses the electrons after they pass through the beam-limiting aperture. Other embodiments, aspects and features are also disclosed.

摘要翻译： 一个实施例涉及一种电子束装置，其包括用于发射电子束的双透镜电子枪。 电子束是第一操作模式中的高束流电子束和处于第二操作模式的低束流电子束。 该装置还包括在第一操作模式中超出远光束电子束的路径的列孔径，并且在第二操作模式中围绕电子束装置的光轴居中。 另一个实施例涉及一种电子枪，其包括第一枪形透镜，光束限制孔和第二枪形透镜。 第一个枪形透镜在电子穿过光束限制孔径之前聚焦电子，而第二个枪形透镜在电子通过光束限制孔径后聚焦电子。 还公开了其它实施例，方面和特征。

公开(公告)号：US08513619B1

公开(公告)日：2013-08-20

申请号：US13468553

申请日：2012-05-10

申请人： Mehran Nasser-Ghodsi ,  Tomas Plettner ,  Robert G. Haynes ,  Christopher Malcolm Stanley Sears

发明人： Mehran Nasser-Ghodsi ,  Tomas Plettner ,  Robert G. Haynes ,  Christopher Malcolm Stanley Sears

IPC分类号： H01J37/04 ,  H01J37/26 ,  H01J27/02

CPC分类号： H01J37/04 ,  H01J3/027 ,  H01J3/029 ,  H01J27/024 ,  H01J37/063 ,  H01J37/065 ,  H01J37/28 ,  H01J2237/06375

摘要： One embodiment disclosed relates to an electron source for generating an electron beam. The electron source includes an electron emitter having a tip from which an electron beam is extracted. The electron further includes a non-planar extractor with an extractor opening and a built-in beam-limiting aperture. The extractor opening is larger than the beam-limiting aperture, and central axes of both the extractor opening and the beam-limiting aperture are aligned with the tip along a beam axis. Another embodiment relates to a method of generating an electron beam using an electron source having a non-planar extractor. Another embodiment relates to an array of electron sources for generating an array of electron beams. The array of electron sources includes an array of electron emitters and an array of non-planar extractor structures. Other embodiments, aspects and features are also disclosed.

摘要翻译： 公开的一个实施例涉及用于产生电子束的电子源。 电子源包括具有尖端的电子发射器，电子束从该尖端被提取。 电子还包括具有提取器开口和内置光束限制孔的非平面提取器。 提取器开口大于光束限制孔径，并且提取器开口和光束限制孔径的中心轴线沿着光束轴线与尖端对准。 另一实施例涉及使用具有非平面提取器的电子源产生电子束的方法。 另一实施例涉及用于产生电子束阵列的电子源阵列。 电子源阵列包括一组电子发射器和一组非平面提取器结构。 还公开了其它实施例，方面和特征。

公开(公告)号：US20100046697A1

公开(公告)日：2010-02-25

申请号：US12606913

申请日：2009-10-27

申请人： Vladimir Balakin

发明人： Vladimir Balakin

IPC分类号： H05G1/60 ,  G01N23/00

CPC分类号： H05H7/10 ,  A61B6/4258 ,  A61N5/1049 ,  A61N2005/1061 ,  A61N2005/1087 ,  H01J3/029 ,  H01J35/06 ,  H01J35/14 ,  H05H13/04

摘要： The invention comprises an X-ray tomography method and apparatus used in conjunction with multi-axis charged particle or proton beam radiation therapy of cancerous tumors. In various embodiments, 3-D images are generated from a series of 2-D X-rays images; the X-ray source and detector are stationary while the patient rotates; the 2-D X-ray images are generated using an X-ray source proximate a charged particle beam in a charged particle cancer therapy system; and the X-ray tomography system uses an electron source having a geometry that enhances an electron source lifetime, where the electron source is used in generation of X-rays. The X-ray tomography system is optionally used in conjunction with systems used to both move and constrain movement of the patient, such as semi-vertical, sitting, or laying positioning systems. The X-ray images are optionally used in control of a charged particle cancer therapy system.

摘要翻译： 本发明包括与多轴带电粒子或癌肿瘤的质子束放射治疗结合使用的X射线断层摄影方法和装置。 在各种实施例中，从一系列2-D X射线图像生成3-D图像; X射线源和检测器在患者旋转时是静止的; 使用在带电粒子癌症治疗系统中的带电粒子束附近的X射线源产生2-D X射线图像; 并且X射线断层摄影系统使用具有增强电子源寿命的几何形状的电子源，其中电子源用于产生X射线。 X射线断层摄影系统可选地与用于移动和约束患者运动的系统结合使用，例如半垂直，坐着或铺设定位系统。 X射线图像任选用于控制带电粒子癌症治疗系统。

公开(公告)号：US4629937A

公开(公告)日：1986-12-16

申请号：US576148

申请日：1984-02-02

申请人： Santosh K. Srivastava ,  Murtadha A. Khakoo

发明人： Santosh K. Srivastava ,  Murtadha A. Khakoo

IPC分类号： H01J3/02 ,  H01J23/16 ,  H01J29/96

CPC分类号： H01J3/029

摘要： Disclosed is a pulsed electron beam gun for generating a high current, short duration pulse which is received by a pulse detection circuit. The gun has a gated electron beam emitting area, a beam deflection and sweeping area and a beam pulse detector. Magnetic collimating means having lines of force along an axis in the direction of the electron beam surrounds the aforementioned structure. The magnetic collimating means intensifies the density and strength of the electron beam once it is emitted from its source of emission and is gated through the electron gate. A conventional pulse source delivers a low voltage pulse and a delayed pulse. The internal impedance of the pulse source is matched at the location of the electron gun where the pulses are applied to the electron gun components. The first pulse, at the beam gate, causes a short burst of electrons to be emitted. The delayed pulse is applied to the deflection means to sweep the electron beam symmetrically across the electron passing aperture in the plate.

摘要翻译： 公开了一种用于产生由脉冲检测电路接收的高电流，短持续时间脉冲的脉冲电子束枪。 枪具有门控电子束发射区域，光束偏转和扫掠区域以及束脉冲检测器。 具有沿电子束方向的轴线的磁准直装置包围上述结构。 磁性准直装置一旦从其发射源发射就强化电子束的密度和强度，并通过电子闸门通电。 常规脉冲源提供低电压脉冲和延迟脉冲。 脉冲源的内部阻抗在电子枪的位置被匹配，其中脉冲施加到电子枪部件。 在光束门处的第一个脉冲导致短时间的电子发射。 将延迟的脉冲施加到偏转装置，以对称地扫过电子束穿过板中的电子通过孔。

公开(公告)号：US3810030A

公开(公告)日：1974-05-07

申请号：US14546071

申请日：1971-05-20

申请人： HAEFELY & CIE AG EMIL

发明人： ADLER H

IPC分类号： G21K1/08 ,  H01J3/02 ,  H05H5/04 ,  H01J29/74

CPC分类号： H05H5/04 ,  G21K1/08 ,  H01J3/029

摘要： Apparatus for focussing the beam of a particle accelerator. A resistive chain is connected across the high voltage source for the accelerator. This chain includes, inter alia, a potentiometer chain for supplying varying potentials to the accelerating electrodes on a pair of fixed resistors for supplying potential to the anode of the electron gun. The beam injection system includes two pairs of deflection plates which receive potential from two ganged pairs of potentiometers wired in parallel across the pair of fixed resistors.

摘要翻译： 用于聚焦粒子加速器的束的装置。 电阻链连接在高压源上，用于加速器。 该链包括尤其是用于向一对固定电阻器上的加速电极提供可变电势的电位计链，用于向电子枪的阳极提供电位。 光束注入系统包括两对偏转板，其接收来自两对并联的电位器对的电位对，该电位器并联连接在该对固定电阻器上。

公开(公告)号：US3769540A

公开(公告)日：1973-10-30

申请号：US3769540D

申请日：1970-10-26

申请人： NORTHROP CORP

发明人： THOMSON J

IPC分类号： H01J3/02 ,  H01J29/48 ,  H01J29/52 ,  H01J29/41

CPC分类号： H01J3/029 ,  H01J3/026 ,  H01J29/488 ,  H01J29/525

摘要： A plurality of strip filaments provide a source of electrons. A deflector electrode in the form of a flat dish is placed behind the filaments, and director electrodes which may be in the form of wire meshes, are placed forward of the filaments in the direction in which the electron flow is desired. Additional electrodes which may be in the form of narrow plates are placed along the ends of the filaments to compensate for fall-off in emission at the filament extremities. The various electrodes are positioned relative to the filaments and have potentials applied thereto such that the uniform distribution of electrons is provided over a predetermined area throughout which electron flow is desired.

摘要翻译： 多条带状细丝提供电子源。 扁平盘形式的偏转器电极放置在灯丝的后面，并且可以是丝网形式的导向器电极沿着需要电子流的方向放置在灯丝的前方。 沿着长丝的端部放置可以是窄板形式的附加电极，以补偿灯丝末端发射的脱落。 各种电极相对于长丝定位并且具有施加到其上的电位，使得电子的均匀分布被提供在期望电子流的整个预定区域上。

公开(公告)号：US3740607A

公开(公告)日：1973-06-19

申请号：US3740607D

申请日：1971-06-03

申请人： WATKINS JOHNSON CO

发明人： SILZARS A ,  BATES D

IPC分类号： H01J3/02 ,  H01J29/48 ,  H01J29/56

CPC分类号： H01J3/029 ,  H01J29/488

摘要： A laminar flow electron gun for forming an electron beam including a cathode for emitting electrons, an apertured dishshaped electrode surrounding the cathode surface and an anode spaced from said cathode and electrode and cooperating therewith to provide a substantially uniform electric field at the surface of said cathode to cause electrons to emit normally from the entire surface in a beam, said anode also forming a divergent electrostatic lens along the path of the beam and accelerating and focusing means disposed further along the path of the beam to accelerate and focus the beam at a target.

摘要翻译： 用于形成包括用于发射电子的阴极的电子束的层流电子枪，围绕阴极表面的有孔的碟形电极和与所述阴极和电极间隔开的并与之配合的阳极，以在其表面处提供基本均匀的电场 所述阴极引起电子从光束中的整个表面正常发射，所述阳极还沿着光束的路径形成发散的静电透镜，并且沿着光束的路径进一步设置的加速和聚焦装置以将光束加速并聚焦在 一个目标。

公开(公告)号：US3732457A

公开(公告)日：1973-05-08

申请号：US3732457D

申请日：1971-01-27

申请人： VICTOR CO LTD

发明人： UENO I ,  TOYA K

IPC分类号： H01J31/20 ,  H01J3/02 ,  H01J29/48 ,  H01J29/50 ,  H01J29/62 ,  H01J29/81 ,  H01J31/12 ,  H01J29/80

CPC分类号： H01J29/506 ,  H01J3/029 ,  H01J29/488 ,  H01J31/12

摘要： An electron gun for a post-acceleration picture tube comprises a first electrode to which a low voltage is applied, a second electrode to which a high voltage is applied and a third electrode to which an intermediate voltage is applied. The main lens of the electron gun is composed of the first, second and third electrodes. The electron gun is particularly useful in a post-acceleration shadow-mask type color picture tube.

摘要翻译： 用于后加速度显像管的电子枪包括施加低电压的第一电极，施加高电压的第二电极和施加有中间电压的第三电极。 电子枪的主透镜由第一，第二和第三电极组成。 电子枪在后加速度荫罩型彩色显像管中特别有用。