公开(公告)号：US20030002627A1

公开(公告)日：2003-01-02

申请号：US10224008

申请日：2002-08-20

Applicant: Oxford Instruments, Inc.

Inventor： Robert J. Espinosa ,  Bradley W. Boyer ,  Scott Snyder ,  Majorie L. Munson ,  Ken G. Gorman

IPC: H01J035/06

CPC classification number: B82Y10/00 ,  H01J35/065

Abstract: A cold emitter x-ray tube is provided comprised of a cathode which is a carbon nanotube or nanostructured carbon film which serves as the electron emission source in an x-ray tube, and is positioned on a suitable substrate. The nanostructured carbon film is selected from a group consisting of nanocyrstalline graphite, carbon nanotubes, diamond, diamond like carbon, or a composite of two or more of members of the group. An extraction/suppression grid may be utilized. A metal anode which functions as the x-ray generating target is positioned within the x-ray tube. A high voltage source with negative contact is connected to the emitter and the positive contact connected to the anode target. This single source of high potential serves to provide the electric field, between the emitter and anode, for extraction of electrons from the emitter and to accelerate the electrons to the target for generation of x-rays. X-rays pass through a beryllium window that is an integral part of the vacuum envelope. The x-ray tube may be used for various applications such as portable x-ray spectrometry, portable fluoroscopy, radiation treatment, and the like.

Abstract translation: 提供了一种冷发射器X射线管，其由作为X射线管中的电子发射源的碳纳米管或纳米结构碳膜的阴极组成，并且位于合适的衬底上。 纳米结构碳膜选自由纳米结构石墨，碳纳米管，金刚石，类金刚石碳组成的组，或组中两个或多个成员的组合。 可以使用提取/抑制网格。 用作X射线产生靶的金属阳极位于X射线管内。 具有负触点的高电压源连接到发射极，正极触点连接到阳极靶。 该单一高电位源用于提供发射极和阳极之间的电场，用于从发射极提取电子，并将电子加速到目标以产生X射线。 X射线通过作为真空外壳的组成部分的铍窗。 X射线管可以用于各种应用，例如便携式x射线光谱法，便携式荧光透视法，放射治疗法等。

公开(公告)号：US20040081282A1

公开(公告)日：2004-04-29

申请号：US10065508

申请日：2002-10-25

Inventor： Thomas D. Schaefer ,  J. Scott Price ,  Sergio Lemaitre

IPC: H01J035/06

CPC classification number: H01J35/06

Abstract: A cathode assembly (43) for a computed tomography scanning system (10) is provided. The cathode assembly (43) includes a one-piece tab assembly (52) for simple and relatively quick installation on a cathode cup (44). In one embodiment, the one-piece tab assembly (52) has two rail portions (56) extending substantially across its length. These rail portions (56) are intended for insertion into channels (50) formed within the cathode cup (44) and for properly locating the one-piece tab assembly (52) in a desired position relative to the filament (46). The assembly (52) further includes two tab portions (58, 58null) located on opposing ends of the rail portions (56). The tab portions (58, 58null) each include a main body portion (62) and a flap portion (54) extending from the main body portion (62). The main body portion (62) extends between the two rail portions (56) and has a mounting surface for attaching the one-piece tab assembly (52) to the cathode cup (44). The flap portions (54) extend substantially perpendicular from the main body portions (62) and direct the electron beam emitted by the filament (46).

Abstract translation: 提供了一种用于计算机断层摄影扫描系统（10）的阴极组件（43）。 阴极组件（43）包括用于在阴极杯（44）上简单且相对快速地安装的单片式舌片组件（52）。 在一个实施例中，一体式翼片组件（52）具有基本上跨越其长度延伸的两个轨道部分（56）。 这些轨道部分（56）旨在用于插入形成在阴极杯（44）内的通道（50）中，并且用于将一体式接头组件（52）适当地定位在相对于灯丝（46）的期望位置。 组件（52）还包括位于轨道部分（56）的相对端上的两个突片部分（58,58“）。 翼片部分（58,58“）各自包括从主体部分（62）延伸的主体部分（62）和翼片部分（54）。 主体部分（62）在两个轨道部分（56）之间延伸并且具有用于将一体式接头组件（52）附接到阴极杯（44）的安装表面。 翼片部分（54）从主体部分（62）基本上垂直延伸并引导由灯丝（46）发射的电子束。

公开(公告)号：US20020126798A1

公开(公告)日：2002-09-12

申请号：US09802517

申请日：2001-03-09

Applicant: MARCONI MEDICAL SYSTEMS, INC.

Inventor： Jason P. Harris ,  Salvatore Perno

IPC: H01J035/06

CPC classification number: H01J35/06 ,  H01J2235/068

Abstract: A dual filament x-ray tube assembly (16) includes an evacuated envelope (52) having an anode (54) disposed at a first end of the evacuated envelope (52) and a cathode assembly (62) disposed at a second end of the evacuated envelope (52). The cathode assembly includes a variable-length filament assembly (72, 74; 100) which emits electron beams for impingement on the anode (54) at focal spots having varying lengths. The cathode assembly (62) further includes a cathode cup (64, 66, 68; 110, 112) which is subdivided into a plurality of electrically insulated deflection electrodes (64, 66, 68; 110, 112). A filament select circuit (80) selectively and individually heats a portion of the variable-length filament assembly (72, 74). Electron beams emitted from the filament assembly (72, 74) are electrostatically focused and controlled by applying potentials to different ones of the deflection electrodes (64, 66, 68; 110, 112). The x-ray tube assembly (16) provides longer focal spots for thick-slice scanning applications and shorter focal spots for thin-slice scanning applications along with the benefit of electrostatic focusing and control.

Abstract translation: 双丝X射线管组件（16）包括抽真空的外壳（52），其具有设置在所述真空外壳（52）的第一端的阳极（54）和设置在所述真空外壳的第二端处的阴极组件 抽空信封（52）。 阴极组件包括可变长度的灯丝组件（72,74; 100），其在具有不同长度的焦点处发射用于在阳极（54）上冲击的电子束。 阴极组件（62）还包括阴极杯（64,66,68,110,112），其被细分为多个电绝缘的偏转电极（64,66,68; 110,112）。 灯丝选择电路（80）选择性地且单独加热可变长度灯丝组件（72,74）的一部分。 从灯丝组件（72,74）发射的电子束通过向不同的偏转电极（64,66,68,110,112）施加电位来静电聚焦和控制。 X射线管组件（16）为薄片扫描应用提供了更长的焦点，并为薄片扫描应用提供了较短的焦斑，同时还具有静电聚焦和控制的优点。

公开(公告)号：US20020009179A1

公开(公告)日：2002-01-24

申请号：US09861934

申请日：2001-05-21

Inventor： Robert Hess ,  Frank Demuth

IPC: H01J035/06

CPC classification number: H01J35/14 ,  H01J35/06

Abstract: The invention relates to an X-ray tube whose cathode arrangement includes a flat electron emitter that is provided with openings. An electrode is arranged on the side of the electron emitter that is remote from the anode of the X-ray tube; this electrode carries a negative potential relative to the electron emitter, which negative potential straightens the electron paths in front of the emitter. These steps result in a favorable ratio of the dimensions of the electron emitter to the dimensions of the focal spot formed on the anode by the emitted electrons.

Abstract translation: 本发明涉及一种X射线管，其阴极装置包括设置有开口的扁平电子发射体。 电极位于远离X射线管的阳极的电子发射器的侧面; 该电极相对于电子发射器具有负电位，该负电位使发射器前面的电子通道伸直。 这些步骤导致电子发射体的尺寸与通过发射的电子在阳极上形成的焦斑的尺寸的有利的比率。

公开(公告)号：US20040240616A1

公开(公告)日：2004-12-02

申请号：US10448144

申请日：2003-05-30

Applicant: APPLIED NANOTECHNOLOGIES, INC.

Inventor： Qi Qiu ,  Jianping Lu ,  Otto Z. Zhou

IPC: H01J035/06

CPC classification number: H01J35/065 ,  H01J2235/068

Abstract: A multi-beam x-ray generating device includes a stationary field-emission cathode having a plurality of stationary and individually controllable electron-emitting pixels disposed in a predetermined pattern on the cathode, an anode opposing the cathode comprising a plurality of focal spots disposed in a predetermined pattern that corresponds to the predetermined pattern of the pixels, and a vacuum chamber enveloping the anode and cathode. An additional construction is in the form of an a x-ray generating device including a stationary field-emission cathode, the cathode having a planar surface with an electron-emissive material disposed on at least a portion thereof, a gate electrode disposed in parallel spaced relationship relative to the planar surface of the cathode, the gate electrode having a plurality of openings having different sizes, an anode opposing the cathode and spaced therefrom, the anode having a plurality of focal spots aligned with the electron-emissive material, and a vacuum chamber enveloping the anode and cathode, wherein the gate electrode is operable such that the openings can be manipulated to bring at least one beam of electrons emitted from the cathode into and out of registry with at least one of the focal spots. Associated methods are also described.

Abstract translation: 多光束X射线产生装置包括具有以阴极上预定图案设置的多个静止和可单独控制的电子发射像素的固定场致发射阴极，与阴极相对的阳极，包括多个焦斑， 对应于像素的预定图案的预定图案，以及包围阳极和阴极的真空室。 附加结构是包括固定场致发射阴极的x射线产生装置的形式，阴极具有设置在其至少一部分上的电子发射材料的平坦表面，平行间隔设置的栅电极 所述栅电极具有多个具有不同尺寸的开口，与所述阴极相对并与之隔开的阳极，所述阳极具有与所述电子发射材料对准的多个焦点，以及真空 室包围阳极和阴极，其中栅极电极可操作，使得可以操纵开口以使至少一个从阴极发射的电子束进入和离开与至少一个焦点的对准。 还描述了相关方法。

公开(公告)号：US20030048874A1

公开(公告)日：2003-03-13

申请号：US09682494

申请日：2001-09-07

Inventor： Colin Richard Wilson ,  Amy Linsebigler Smentkowski ,  Lembit Salasoo

IPC: H01J035/06

CPC classification number: A61B6/032 ,  A61B6/4021 ,  A61B6/4488 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14

Abstract: Methods and apparatus for generating x-ray beams are described. In one embodiment, the method includes operating a cathode to generate an electron beam, directing the electron beam from the cathode through an aperture in an accelerating electrode, and impinging the electron beam on an anode surface to form a focal spot on the anode surface.

Abstract translation: 描述了用于产生x射线束的方法和装置。 在一个实施例中，该方法包括操作阴极以产生电子束，将来自阴极的电子束引导通过加速电极中的孔，并将电子束撞击在阳极表面上以在阳极表面上形成焦斑。

公开(公告)号：US20010016027A1

公开(公告)日：2001-08-23

申请号：US09748590

申请日：2000-12-22

Inventor： Mark Dinsmore

IPC: H01J035/06

CPC classification number: A61N5/1001 ,  H01J35/065 ,  H01J35/32 ,  H01J2235/087 ,  H01J2235/164

Abstract: This invention is directed to a radiation source comprising a power supply, a flexible fiber optic cable assembly, a light source, and a target assembly. The power supply includes a first terminal and a second terminal, and elements for establishing an output voltage between the first terminal and the second terminal. The flexible fiber optical cable assembly has an originating end and a terminating end, and includes a fiber optical element extending from the originating end to the terminating end. The cable is adapted for transmitting light incident on the originating end to the terminating end. The light source includes elements for generating a beam of light at and directed to the originating end of the fiber optical cable assembly. The target assembly is affixed to the terminating end of the fiber optical cable assembly and is electrically coupled to the power supply by way of the first terminal and the second terminal. The target assembly includes elements for emitting radiation in a predetermined spectral range, in response to light transmitted to the terminating end.

公开(公告)号：US20040174956A1

公开(公告)日：2004-09-09

申请号：US10378174

申请日：2003-03-03

Applicant: Varian Medical Systems, Inc.

Inventor： Charles Lynn Chidester

IPC: H05H001/00 ,  G21G004/00 ,  H01J035/00 ,  H01J035/06

CPC classification number: H01J35/02 ,  H01J9/30

Abstract: An apparatus and method for reducing the incidence of electric field stress on portions of insulating structures within high voltage devices is disclosed. Each of the embodiments disclosed herein modifies the conductive properties of the insulating structure surface in a non-uniform manner such that the distribution of voltage potential along the surface thereof is more fully equalized during operation of the high voltage device. This, in turn, reduces the per unit stress on the insulating structure caused by the electric field of the high voltage device. Though embodiments of the present invention are preferably directed to utilization in x-ray tube devices, a variety of high voltage devices may benefit from application of the disclosed matter.

Abstract translation: 公开了一种用于降低高压装置内的绝缘结构部分上的电场应力的发生的装置和方法。 本文公开的每个实施例以不均匀的方式修改绝缘结构表面的导电性质，使得在高压器件的操作期间，沿着其表面的电压电势的分布更加完全均衡。 这又降低了由高压器件的电场引起的绝缘结构上的每单位应力。 尽管本发明的实施例优选地涉及在x射线管装置中的应用，但是各种高压装置可以受益于所公开的物质的应用。

公开(公告)号：US20030063707A1

公开(公告)日：2003-04-03

申请号：US09682633

申请日：2001-10-01

Inventor： Gregory Anthony Mulhollan

IPC: H01J035/06

CPC classification number: H01J35/065 ,  H01J9/025

Abstract: An X-radiation source can comprise an electron emission layer and an anode layer. In an embodiment the anode layer may be no more than approximately 1000 microns from the emission layer or include an anode region that laterally surrounds a hole extending through the anode layer. In one embodiment, a plurality of electron emission tips, extraction gate electrodes and anode regions may be used. When the anode regions comprise different materials, a plurality of wavelengths may be emitted. In another embodiment, a monolithic structure can be formed using processing operations similar to those used in conventional semiconductor device manufacturing. The X-radiation source can be relatively small and may have uses in applications with confined spaces, such as medical applications.

Abstract translation: X射线源可以包括电子发射层和阳极层。 在一个实施例中，阳极层可以距离发射层不超过约1000微米，或者包括横向围绕延伸穿过阳极层的孔的阳极区域。 在一个实施例中，可以使用多个电子发射尖端，提取栅极电极和阳极区域。 当阳极区域包括不同的材料时，可以发射多个波长。 在另一个实施例中，可以使用类似于常规半导体器件制造中使用的处理操作来形成单片结构。 X辐射源可以相对较小，并且可以在具有密闭空间的应用中使用，例如医疗应用。

公开(公告)号：US20010019601A1

公开(公告)日：2001-09-06

申请号：US09797101

申请日：2001-03-01

Applicant: Rigaku Corporation

Inventor： Sadayuki Tkahashi ,  Masaru Kuribayashi ,  Naohisa Osaka

IPC: H01J035/06

CPC classification number: B82Y10/00 ,  H01J35/065 ,  H01J35/14 ,  H01J2201/30469 ,  Y10S977/742 ,  Y10S977/844

Abstract: An X-ray generator includes a cathode having an emitter made of carbon nanotubes which emits electrons by field emission and thus becomes a cold cathode electron emission source. In the invention using the carbon nanotubes, any one of the following three forms is adopted to control the tube current apart from the electron-focusing control. The first form is that a takeoff electrode is disposed near the cathode and the Wehnelt potential and the takeoff electrode potential are controlled independently. The second form is that an electron emission source is disposed behind the cathode and the electron emission source emits electrons which collide against the back of the cathode so that the cathode temperature is controlled in a range of the room temperature to about 100 degrees Celsius to regulate an amount of electron emission from the cathode. The third form is that the cathode has a heater so that the cathode temperature is controlled in a range of the room temperature to about 100 degrees Celsius to regulate an amount of electron emission from the cathode.

Abstract translation: X射线发生器包括具有由碳纳米管制成的发射体的阴极，该发射体通过场发射发射电子，从而成为冷阴极电子发射源。 在使用碳纳米管的本发明中，采用以下三种形式中的任一种来控制除电子聚焦控制之外的管电流。 第一种形式是在阴极附近配置起飞电极，独立地控制Wehnelt电位和起飞电极电位。 第二种形式是电子发射源设置在阴极后面，电子发射源发射与阴极背面相撞的电子，使阴极温度控制在室温至约100摄氏度的范围内以调节 来自阴极的电子发射量。 第三种形式是阴极具有加热器，使得阴极温度控制在室温至约100摄氏度的范围内以调节从阴极发射的电子的量。