公开(公告)号：US3857038A

公开(公告)日：1974-12-24

申请号：US31819872

申请日：1972-12-26

Applicant: AQUITAINE PETROLE

Inventor： SAHORES J

IPC: G01N23/223 ,  H01J3/02 ,  H01J35/02 ,  H01J35/20 ,  H01J39/28

CPC classification number: H01J35/02 ,  G01N23/223 ,  G01N2223/076 ,  H01J3/021 ,  H01J35/20

Abstract: An improved glow-tube for X-ray spectrometry with directly excited samples, characterized by the positioning of a cold cathode, grid-shaped anode and an opening leading into the spectrometer chamber along the axis of the tube casing. This glow-tube is used for X-ray spectrometric analysis and for structural analysis by diffraction or scattering.

Abstract translation: 用于具有直接激发的样品的X射线光谱测量的改进的辉光管，其特征在于定位冷阴极，格栅状阳极和沿着管壳的轴线通向光谱室的开口。

公开(公告)号：US3810025A

公开(公告)日：1974-05-07

申请号：US24523272

申请日：1972-04-18

Applicant: JEOL LTD

Inventor： AIHARA R ,  OTA S ,  KOBAYASHI N

IPC: H01J3/02 ,  H01J37/073 ,  H01J37/24 ,  H02H7/20

CPC classification number: H01J37/241 ,  H01J3/021 ,  H01J37/073 ,  H02H7/20

Abstract: This invention relates to a field emission type electron gun capable of protecting the emitter tip from damage when electrical breakdown occurs in the gun chamber. The preferred embodiments incorporate circuitry for decreasing the impedance between the emitter and its associated electrode when electrical breakdown occurs.

Abstract translation: 本发明涉及一种场致发射型电子枪，能够在枪室发生电击穿时保护发射极尖免受损坏。 优选的实施例结合电路，用于当发生电击穿时减小发射极及其相关电极之间的阻抗。

公开(公告)号：US3766427A

公开(公告)日：1973-10-16

申请号：US3766427D

申请日：1972-02-07

Applicant: AMERICAN OPTICAL CORP

Inventor： COATES V ,  WELTER L

IPC: G01Q30/12 ,  H01J3/02 ,  H01J37/073 ,  H01J37/18 ,  H01J37/248 ,  H01J37/29 ,  H01J29/56

CPC classification number: H01J37/073 ,  H01J3/021 ,  H01J37/18 ,  H01J37/248 ,  H01J37/292

Abstract: A field emission electron gun comprises a field emission tip as its source of electrons. A first anode is spaced downstream from the tip and when a voltage is applied between the first anode and the tip, electrons from the tip are accelerated toward the first anode. An opening in the first anode limits the angular spread of the electron beam. A second anode is spaced downstream from the first anode and when a voltage is applied between the second anode and the tip, the energy level of the electrons at the image or specimen plane is controlled. The electrostatic field between the first and the second anode brings the electron beam into focus. For protecting the field emission tip against high voltage discharges, a third electrode in the form of a shield surrounds the field emission tip and is maintained at or near the electrical potential of the tip. Within the shield is a fourth electrode which serves, when voltage is applied thereto, to draw electrons from the tip and to restore or maintain normal operating conditions for the field emission electron gun. An iongetter vacuum pump and a reactive sublimator vacuum pump are formed in the electron gun by evaporating a highly reactive element or getter material on the inner walls of the third electrode, which serves as a collector by inducing gas molecules which strike this surface to adhere thereto and to be imbedded therein. The inner walls of the third electrode react with reactive gasses present in the region of the tip and the fourth electrode. The ion getter pump operates by ionizing residual gas molecules which are then impelled by electric fields and are imbedded under the coating of sublimed getter material. The primary electron beam from the tip strikes the surface of the fourth electrode, thereby causing reflected and secondary electrons to be emitted from the surface, which electrons form an electron cloud capable of ionizing molecules within the chamber. The electron cloud is formed and the ionized gas molecules are collected by applying the appropriate potentials to the electrodes in the gun assembly. The third electrode may be cooled by a liquid nitrogen cooling system, which functions as a cryogenic vacuum pump. This cooling system can also be used to cool the tip in order to reduce the tip flicker noise resulting in greater stability of electron emission.

Abstract translation: 场发射电子枪包括场发射尖端作为其电子源。 第一阳极与尖端间隔开，并且当在第一阳极和尖端之间施加电压时，来自尖端的电子朝向第一阳极被加速。 第一阳极中的开口限制电子束的角扩展。 第二阳极与第一阳极隔开下游，并且当在第二阳极和尖端之间施加电压时，控制图像或样本平面处的电子的能级。 第一和第二阳极之间的静电场使电子束聚焦。

公开(公告)号：US3555281A

公开(公告)日：1971-01-12

申请号：US3555281D

申请日：1968-02-12

Applicant: ALEXEI PETROVICH SKIBARKO ,  KAREN ANDRANIKOVICH GULGAZARYA

Inventor： SKIBARKO ALEXEI PETROVICH ,  GULGAZARYAN KAREN ANDRANIKOVIC

IPC: G02F2/00 ,  H01J3/02 ,  H01J40/02 ,  H01J43/08 ,  H01J39/14

CPC classification number: H01J3/021 ,  G02F2/00 ,  H01J40/02 ,  H01J43/08 ,  H01J2201/342

Abstract: A photocell receiver is provided on the outer surface thereof in front of its light-sensitive surface with at least one electrode capable of transmitting luminous radiation, the electrode being positioned so that when supplied with an alternating voltage it produces an alternating electric field which penetrates through the light-sensitive surface to affect photoelectrons thereon.

公开(公告)号：US3510713A

公开(公告)日：1970-05-05

申请号：US3510713D

申请日：1966-07-19

Applicant: WILLARD H BENNETT

Inventor： BENNETT WILLARD H

IPC: H01J3/02 ,  H01J29/58 ,  H01J35/14 ,  H01J37/06 ,  H01J37/24 ,  H01J35/00

CPC classification number: H01J37/24 ,  H01J3/021 ,  H01J29/58 ,  H01J35/14 ,  H01J37/06

公开(公告)号：US2987641A

公开(公告)日：1961-06-06

申请号：US71149558

申请日：1958-01-27

Applicant: TRUB TAUBER & CO A G

Inventor： LIENHARD WEGMANN

IPC: G01Q10/00 ,  H01J3/02

CPC classification number: H01J3/021

公开(公告)号：US2452044A

公开(公告)日：1948-10-26

申请号：US49864643

申请日：1943-08-14

Applicant: BENJAMIN FOX

Inventor： BENJAMIN FOX

IPC: H01J3/02

CPC classification number: H01J3/021

公开(公告)号：US12080507B2

公开(公告)日：2024-09-03

申请号：US17763186

申请日：2020-09-04

Applicant: Photo electron Soul Inc.

Inventor： Hokuto Iijima

IPC: H01J3/02 ,  H01J1/34 ,  H01J1/52 ,  H01J3/10 ,  H01J37/073

CPC classification number: H01J3/021 ,  H01J1/34 ,  H01J1/52 ,  H01J3/10 ,  H01J37/073 ,  H01J2237/06333

Abstract: An object is to provide an electron gun that makes it possible to verify whether or not an electron beam emitted form a photocathode is misaligned from a designed emission center axis. The object can be achieved by an electron gun including: a light source; a photocathode; and an anode. The electron gun includes an intermediate electrode arranged between the photocathode and the anode, an electron beam shielding member configured to block a part of an electron beam, a measurement unit configured to measure an intensity of an electron beam blocked by the electron beam shielding member, and an electron beam emission direction deflector arranged between the anode and the electron beam shielding member and configured to change a position where an electron beam that passed through the anode reaches the electron beam shielding member. The intermediate electrode has an electron beam passage hole and a drift space.

公开(公告)号：US20230411101A1

公开(公告)日：2023-12-21

申请号：US18247264

申请日：2021-09-29

Applicant: NCX Corporation

Inventor： Jian ZHANG

IPC: H01J3/02 ,  H01J9/18

CPC classification number: H01J3/021 ,  H01J9/18

Abstract: A field emission cathode device and method for forming a field emission cathode device involve a cathode element having a field emission surface, and a gate electrode element disposed in spaced-apart relation to the field emission surface of the cathode element so as to define a gap therebetween, with the gate electrode element having a plurality of parallel grill members or a mesh structure laterally-extending between opposing anchored ends. A film element laterally co-extends and is engaged with the gate electrode element, with the film element being arranged to allowed electrons emitted from the field emission surface of the cathode element to pass therethrough, and to cooperate with the gate electrode element and the cathode element to form a substantially uniform electric field within the gap and about the field emission surface.

公开(公告)号：US20180301324A1

公开(公告)日：2018-10-18

申请号：US15956300

申请日：2018-04-18

Applicant: UNIVERSITY OF SOUTHERN CALIFORNIA

Inventor： FATEMEH REZAEIFAR BAYAT ,  REHAN RASHID KAPADIA

IPC: H01J40/06

CPC classification number: H01J40/06 ,  H01J3/021

Abstract: A photonic electron emission device includes an emitter, a photonic energy conduit evanescently coupled to the emitter, and an anode. The emitter includes a component selected from the group consisting of a metal, a semimetal, a semiconductor having a bandgap that is less than about 3.5 eV. The anode is positively biased with respect to the emitter, the anode directing electrons emitted from the emitter.