公开(公告)号：US20190333730A1

公开(公告)日：2019-10-31

申请号：US16312565

申请日：2017-03-16

Applicant: MEIDENSHA CORPORATION

Inventor： Daizo TAKAHASHI ,  Michihiro HATANAKA

IPC: H01J35/06 ,  H01J35/12 ,  H01J1/304 ,  H01J3/02 ,  H01J7/18

Abstract: An emitter (3) and a target (7) are arranged so as to face each other in a vacuum chamber (1), and a guard electrode (5) is provided at an outer circumferential side of an electron generating portion (31) of the emitter (3). The emitter (3) is supported movably in both end directions of the vacuum chamber (1) by the emitter supporting unit (4) having a movable body (40). The emitter supporting unit (4) is operated by an operating unit (6) connected to the emitter supporting unit (4). By operating the emitter supporting unit (4) by the operating unit (6), a distance between the electron generating portion (31) of the emitter (3) and the target (7) is changed, and a position of the emitter (3) is fixed at an arbitrary distance, then field emission is performed with the position of the emitter (3) fixed.

公开(公告)号：US20180366294A1

公开(公告)日：2018-12-20

申请号：US15919561

申请日：2018-03-13

Applicant: Shimadzu Corporation

Inventor： Akihiro MIYAOKA

IPC: H01J3/07 ,  H01J37/075 ,  H01J35/14 ,  H01J3/02 ,  H01J37/12

Abstract: An electron beam apparatus includes: a cathode configured to emit electrons; an anode that is an electrode which forms an electric field such that an electron beam is formed by the electrons emitted from the cathode, and that is formed with a first hole through which the electron beam passes; an aperture member formed with an opening that shades a part of the electron beam which passes through the anode; and a convergence electrode that is an electrode which forms an electric field such that the electron beam which passes through the opening converges, and that is configured to include one single-hole electrode formed with a second hole through which the electron beam passes.

公开(公告)号：US10102998B2

公开(公告)日：2018-10-16

申请号：US15791818

申请日：2017-10-24

Applicant: Schlumberger Technology Corporation

Inventor： Matthieu Simon ,  Anthony Durkowski ,  Christian Stoller

IPC: H01J35/02 ,  H01J37/06 ,  E21B47/01 ,  E21B47/08 ,  G01N23/20 ,  G01V5/04 ,  G01V5/12 ,  G01V3/12 ,  G01V3/30 ,  G01N23/20008 ,  G01V5/00 ,  E21B47/10 ,  H02M7/10 ,  H05G1/10 ,  H05H3/06 ,  H05H5/04 ,  H01J3/02 ,  H01J43/04 ,  G01N9/24 ,  G01N35/00 ,  E21B49/00

Abstract: A well-logging tool may include a sonde housing, and a radiation generator carried by the sonde housing. The radiation generator may include a generator housing, a target carried by the generator housing, a charged particle source carried by the generator housing to direct charged particles at the target, and at least one voltage source coupled to the charged particle source. The at least one voltage source may include a voltage ladder comprising a plurality of voltage multiplication stages coupled in a bi-polar configuration, and at least one loading coil coupled at at least one intermediate position along the voltage ladder. The well-logging tool may further include at least one radiation detector carried by the sonde housing.

公开(公告)号：US20180190464A1

公开(公告)日：2018-07-05

申请号：US15856251

申请日：2017-12-28

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Wenhui HUANG ,  Dongsheng ZHANG ,  Qingxiu JIN ,  Chengjun TAN ,  Donghai LIU ,  Qun LUO ,  Chuanxiang TANG

IPC: H01J3/02

CPC classification number: H01J3/028 ,  H01J3/027 ,  H01J35/06 ,  H01J35/14 ,  H01J2235/068

Abstract: An electron gun, an X-ray source and a CT device are provided. The electron gun includes a body having a first end portion and a second end portion opposite to each other, wherein the first end portion is a connecting end portion; an internal cavity is formed in the body and has an opening positioned on the second end portion,d a cathode, a grid, a compensation electrode and a focus electrode, orderly arranged in the internal cavity in a direction from the first end portion to the second end portion.

公开(公告)号：US20170323755A1

公开(公告)日：2017-11-09

申请号：US15603340

申请日：2017-05-23

Applicant: ELWHA LLC

Inventor： William David Duncan ,  Roderick A. Hyde ,  Jordin T. Kare ,  Max N. Mankin ,  Tony S. Pan ,  Lowell L. Wood

IPC: H01J1/48 ,  H01J3/02

CPC classification number: H01J1/48 ,  H01J3/021 ,  H01J2203/0232 ,  Y10T29/49204

Abstract: Graphene grids are configured for applications in vacuum electronic devices. A multilayer graphene grid is configured as a filter for electrons in a specific energy range, in a field emission device or other vacuum electronic device. A graphene grid can be deformable responsive to an input to vary electric fields proximate to the grid. A mesh can be configured to support a graphene grid.

公开(公告)号：US09627168B2

公开(公告)日：2017-04-18

申请号：US14539571

申请日：2014-11-12

Applicant: Elwha LLC

Inventor： Roderick A. Hyde ,  Jordin T. Kare ,  Tony S. Pan ,  Lowell L. Wood, Jr.

IPC: H01J1/48 ,  H01J19/38 ,  H01J29/46 ,  H01J45/00 ,  H01J3/02

CPC classification number: H01J29/46 ,  H01J1/48 ,  H01J3/021 ,  H01J45/00 ,  H01J2203/0232

Abstract: A field emission device is configured with a grid that includes nanotubes or nanowires. In one embodiment a cathode, an anode, and a nanotube or nanowire grid are responsive to inputs to produce a potential barrier between the grid and at least one of the cathode and the anode such that a set of electrons from the cathode can tunnel through the potential barrier to produce a net current at the anode.

公开(公告)号：US09552953B2

公开(公告)日：2017-01-24

申请号：US14753380

申请日：2015-06-29

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： Bing-Chu Du ,  Peng Liu ,  Duan-Liang Zhou ,  Chun-Hai Zhang ,  Shou-Shan Fan

IPC: H01J1/304 ,  H01J3/02 ,  H01J9/02

CPC classification number: H01J1/304 ,  H01J3/021 ,  H01J9/025 ,  H01J2201/30469 ,  H01J2203/0268 ,  H01J2203/0272 ,  H01J2203/028 ,  H01J2203/0284 ,  H01J2203/0288

Abstract: The disclosure relates to a field emission cathode. The field emission cathode includes a microchannel plate, a cathode electrode and a number of cathode emitters. The microchannel plate is an insulative plate and includes a first surface and a second surface opposite to the first surface. The microchannel plate defines a number of holes extending through the microchannel plate from the first surface to the second surface. The cathode electrode is located on the first surface. The number of cathode emitters are filled in the number of holes and electrically connected with the cathode electrode.

Abstract translation: 本发明涉及场致发射阴极。 场发射阴极包括微通道板，阴极电极和多个阴极发射体。 微通道板是绝缘板，包括第一表面和与第一表面相对的第二表面。 微通道板限定了从第一表面到第二表面延伸穿过微通道板的许多孔。 阴极位于第一表面。 阴极发射体的数量填充有孔数并与阴极电连接。

公开(公告)号：US09496673B2

公开(公告)日：2016-11-15

申请号：US14005469

申请日：2012-02-21

Applicant: Toshiyuki Morishita ,  Yoshinori Terui ,  Shimpei Hirokawa

Inventor： Toshiyuki Morishita ,  Yoshinori Terui ,  Shimpei Hirokawa

IPC: H01J37/065 ,  H01R43/26 ,  H01J37/06 ,  H01J37/08 ,  H01J3/02 ,  H01J37/07 ,  H01J37/067

CPC classification number: H01R43/26 ,  H01J3/02 ,  H01J37/06 ,  H01J37/065 ,  H01J37/067 ,  H01J37/07 ,  H01J37/08 ,  Y10T29/49117

Abstract: The present invention is a charged-particle gun (EG) in which a negative electrode (1) and a positive electrode (9) are integrated and assembled in advance, and which can be stored and transported in a state in which the negative electrode and the positive electrode are integrated, wherein the negative electrode and the positive electrode are connected by a conductor (11) during storage and transportation of the charged-particle gun. It is thereby possible to prevent an electrode tip of the charged-particle gun from being damaged by electrical discharge caused by static electricity during storage and transportation.

Abstract translation: 本发明是一种带电粒子枪（EG），其中负极（1）和正极（9）预先集成并组装，并且可以在负极和 正极集成在一起，其中在带电粒子枪的储存和运输期间，负极和正极通过导体（11）连接。 由此，可以防止带电粒子枪的电极头在储存和运输期间由静电引起的放电损坏。

公开(公告)号：US20160314935A1

公开(公告)日：2016-10-27

申请号：US15203888

申请日：2016-07-07

Applicant: MAPPER LITHOGRAPHY IP B.V.

Inventor： Laura DINU-GÜRTLER ,  Eric Petrus HOGERVORST

IPC: H01J37/317 ,  H01J3/02 ,  H01J37/075 ,  H01J1/15

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

Abstract: 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：US09466453B2

公开(公告)日：2016-10-11

申请号：US14578533

申请日：2014-12-22

Applicant: MAPPER LITHOGRAPHY IP B.V

Inventor： Laura Dinu-Gürtler ,  Eric Petrus Hogervorst

IPC: H01J1/15 ,  H01J1/28 ,  H01J37/075 ,  H01J37/317 ,  G03F7/20 ,  H01J3/02

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

Abstract: The invention relates to a cathode arrangement comprising: a cathode body housing an emission surface for emitting electrons in a longitudinal direction, wherein the emission surface is bounded by an emission perimeter; a focusing electrode at least partially enclosing the cathode body in a transversal direction and comprising an electron transmission aperture for focusing the electrons emitted by the emission surface, wherein the aperture is bounded by an aperture perimeter, wherein the cathode body is moveably arranged within the focusing electrode over a maximum transversal distance from an aligned position, and wherein the aperture perimeter transversally extends over the emission surface and beyond the emission perimeter over an overlap distance that exceeds the maximum transversal distance.