公开(公告)号：US4091311A

公开(公告)日：1978-05-23

申请号：US751561

申请日：1976-12-17

Applicant: Charles Mendelsohn ,  Holger Martin Luther

Inventor： Charles Mendelsohn ,  Holger Martin Luther

IPC: H01J29/04 ,  H01J29/48 ,  H01J29/58

CPC classification number: H01J3/02 ,  H01J29/04 ,  H01J29/488

Abstract: A modulatable, hollow beam electron gun assembly includes an electron-optical (E-O) column having a fixed diameter ring, dispenser type cathode assembly for providing a hollow electron beam through thermionic emission from a hollow cylindrical cathode element, first and second control grid assemblies, a first anode assembly and a second anode assembly, which in combination with a beam modulator assembly comprises an electrostatic coaxial lens assembly. The grid and anode assemblies provide control of the emitted beam current density. The beam modulator assembly includes an axial electrode positioned along the longitudinal axis of the second anode assembly and first and second hollow, anode modulator rings disposed within the second anode and circumscribing a different portion of the axial electrode, each modulator ring responsive to modulation signals presented to each at a substantially complementary magnitude and polarity to provide a hollow electron beam having an average diameter provided by an instantaneous outer diameter and inner diameter value, the ratio of which defines an aspect ratio of the beam.

Abstract translation: 可调节的中空束电子枪组件包括具有固定直径环的电子 - 光学（EO）柱，分配器型阴极组件，用于通过来自中空圆柱形阴极元件的热电子发射提供中空电子束，第一和第二控制栅组件， 第一阳极组件和第二阳极组件，其与光束调制器组件组合包括静电同轴透镜组件。 栅极和阳极组件提供对发射的束电流密度的控制。 光束调制器组件包括沿着第二阳极组件的纵向轴线定位的轴向电极，以及设置在第二阳极内并包围轴向电极的不同部分的第一和第二空心阳极调制器环，每个调制器环响应于所呈现的调制信号 以基本上互补的大小和极性来提供具有由瞬时外径和内径值提供的平均直径的中空电子束，其中该电子束的比率限定了该束的纵横比。

公开(公告)号：US3864572A

公开(公告)日：1975-02-04

申请号：US40284473

申请日：1973-10-02

Applicant: PHILIPS CORP

Inventor： VAN DER MAST KAREL DIEDERICK ,  BARTH JAMES EDMOND

IPC: H01J37/06 ,  H01J3/02 ,  H01J37/075 ,  H05H7/08 ,  H01J37/26

CPC classification number: H01J37/075 ,  H01J3/02 ,  H01J3/024 ,  H01J2237/06316

Abstract: The electron source of an electron beam apparatus comprises a cathode wire which is to be heated by a laser beam and which is to be displaced in the wire direction. This cathode wire has a thickness of from 10 to 30 microns. By applying a field strength of 105 to 106 KV/m to the heated wire tip and by controlling the laser intensity and the wire feed during operation by a signal derived from the emission of the wire tip, a tip is produced on the wire end having a curvature radius of approximately 1 micron. At a temperature just below the melting temperature of the wire a stable temperature field emission having a current density of up to better than 104 A/cm2 is thus realized.

Abstract translation: 电子束装置的电子源包括由激光束加热并在线方向移位的阴极线。 该阴极线的厚度为10至30微米。 通过向加热的线尖施加105至106KV / m的场强，并且通过由电极尖端的发射导出的信号控制操作期间的激光强度和送丝，在具有 大约1微米的曲率半径。 在刚好低于电线熔化温度的温度下，实现了电流密度高达104A / cm2的稳定的温度场发射。

公开(公告)号：US3482139A

公开(公告)日：1969-12-02

申请号：US3482139D

申请日：1967-03-27

Applicant: CSF

Inventor： LEBOUTET HUBERT ,  MANGIN JEAN-PAUL

IPC: G21K1/04 ,  G21K1/08 ,  H01J3/02 ,  H01J25/78 ,  H01J25/26

CPC classification number: H01J25/78 ,  G21K1/04 ,  G21K1/043 ,  G21K1/08 ,  H01J3/02

公开(公告)号：US3284657A

公开(公告)日：1966-11-08

申请号：US28515063

申请日：1963-06-03

Applicant: VARIAN ASSOCIATES

Inventor： IRA WEISSMAN

IPC: H01J1/14 ,  H01J1/28 ,  H01J3/02 ,  H01J45/00

CPC classification number: H01J45/00 ,  H01J1/14 ,  H01J1/28 ,  H01J3/02

公开(公告)号：US2732511A

公开(公告)日：1956-01-24

申请号：US2732511D

IPC: H01J3/02 ,  H01J29/62 ,  H01J29/82

CPC classification number: H01J29/82 ,  H01J3/02 ,  H01J29/62

公开(公告)号：US2540621A

公开(公告)日：1951-02-06

申请号：US942048

申请日：1948-02-19

Applicant: RCA CORP

Inventor： JOHNSON RALPH E

IPC: H01J3/02 ,  H01J29/48

CPC classification number: H01J3/02 ,  H01J29/48

公开(公告)号：US2092273A

公开(公告)日：1937-09-07

申请号：US7477636

申请日：1936-04-16

Applicant: NAT CANDY COMPANY INC

Inventor： COSLER HORACE B

IPC: A23G3/26 ,  A23G3/28 ,  H01J3/02

CPC classification number: A23G3/26 ,  A23G3/0097 ,  A23G3/28 ,  A23G3/54 ,  H01J3/02

公开(公告)号：US20170199131A1

公开(公告)日：2017-07-13

申请号：US15314346

申请日：2015-05-27

Applicant: Japan Science and Technology Agency

Inventor： Hiroyuki Yoshida

IPC: G01N21/71 ,  G01J3/02 ,  H01J37/244 ,  G01J3/443

CPC classification number: G01N21/71 ,  G01J3/0208 ,  G01J3/443 ,  G01N21/62 ,  G01N23/2254 ,  G01N2201/0638 ,  G01N2201/068 ,  G01N2223/6116 ,  H01J3/02 ,  H01J3/18 ,  H01J37/244 ,  H01J37/252 ,  H01J2237/06308 ,  H01J2237/06375 ,  H01J2237/2445

Abstract: An inverse photoemission spectroscopy apparatus is configured to detect a light generated by the relaxation of electrons to an unoccupied state of a sample. The apparatus includes an electron source for generating electrons with which a sample is irradiated, a wavelength selector for extracting a light having a certain wavelength from the light generated in the sample, a photodetector for detecting the light extracted by the wavelength selector; and a focusing optics disposed between the sample and the photodetector. The electron source contains yttrium oxide as a thermionic emission material.

公开(公告)号：US09502202B2

公开(公告)日：2016-11-22

申请号：US13338925

申请日：2011-12-28

Applicant: Moe J. Arman ,  Charles Chase

Inventor： Moe J. Arman ,  Charles Chase

IPC: H01J3/02 ,  G21K1/08

CPC classification number: H01J3/02 ,  G21K1/08

Abstract: Systems and methods for generating a coherent matterwave beam are provided. In some aspects, a system includes a plurality of beam generating units. Each of the plurality of beam generating units is configured to generate a stream of charged particles. The system also includes a magnetic field generator configured to expose the plurality of streams to a magnetic field such that (i) the charged particles of the plurality of streams undergo phase synchronization with one another in response to a vector potential associated with the magnetic field and (ii) the plurality of streams is directed along one or more channels to combine with one another and produce a coherent matterwave beam.

Abstract translation: 提供了用于产生一致的物质波束的系统和方法。 在一些方面，系统包括多个光束产生单元。 多个光束产生单元中的每一个被配置为产生带电粒子流。 该系统还包括磁场发生器，其被配置为将多个流暴露于磁场，使得（i）响应于与磁场相关联的向量电位，多个流中的带电粒子彼此相位同步，以及 （ii）多个流沿着一个或多个通道引导以彼此结合并产生一个相干物质波束。

公开(公告)号：US09018596B2

公开(公告)日：2015-04-28

申请号：US14366564

申请日：2012-12-19

Applicant: Universiteit Antwerpen

Inventor： Johan Verbeeck ,  Gustaaf Van Tendeloo

IPC: H01J37/04 ,  H01J37/26 ,  H01J3/02 ,  H01J37/06 ,  H01J37/08 ,  H01J37/256

CPC classification number: H01J37/04 ,  H01J3/02 ,  H01J3/021 ,  H01J37/06 ,  H01J37/08 ,  H01J37/256 ,  H01J37/261 ,  H01J2237/06383 ,  H01J2237/2614

Abstract: A device for imparting an orbital angular momentum to a charged particle wave propagating along a beam axis in a charged particle beam generating apparatus is described. The device comprises a support element having a target region adapted for transmitting a charged particle wave propagating along a beam axis and an induction means for inducing a magnetic flux along an elongated profile having a free end portion located in the target region and the induction means is adapted for providing a magnetic flux in the elongated profile in order to induce an angular gradient, relative to the beam axis, of the phase of the charged particle wave when transmitted through the target region. A corresponding method is also disclosed, as well as the use thereof in electron microscopy.

Abstract translation: 描述了一种用于对带电粒子束产生装置中沿着光束轴传播的带电粒子波进行轨道角动量的装置。 该装置包括支撑元件，该支撑元件具有适于传输沿着光束轴传播的带电粒子波的目标区域和用于沿着具有位于目标区域中的自由端部分的细长轮廓感应磁通量的感应装置，并且感应装置是 适于在细长轮廓中提供磁通量，以便当透射通过目标区域时引起带电粒子波相位相对于光束轴的角度梯度。 还公开了相应的方法，以及其在电子显微镜中的应用。