公开(公告)号：US08174174B2

公开(公告)日：2012-05-08

申请号：US12759621

申请日：2010-04-13

Applicant: James T. Arnold ,  Steve Bandy ,  Gary Virshup

Inventor： James T. Arnold ,  Steve Bandy ,  Gary Virshup

IPC: H01J1/13 ,  H01J1/16

CPC classification number: H01J35/06 ,  H01J2235/06

Abstract: An apparatus and method comprising a cathode structure which can be a cylindrical filament coiled in a helix or which can be constructed of a ribbon or other suitable shape. The cathode structure can be heated by passage of an electrical current, or by other means such as bombardment with energetic electrons. Selected portions of the surface of the cathode structure have an altered property with respect to the non-selected portions of the surface. In one embodiment, the altered property is a curvature. In another embodiment, the altered property is a work function. By altering the property of the selected portions of the surface, the electron beam intensity is increased, and the width is decreased.

Abstract translation: 一种包括阴极结构的装置和方法，阴极结构可以是以螺旋线圈绕的圆柱形细丝，或者可以由带状物或其他合适的形状构成。 阴极结构可以通过电流加热，或者通过其他手段例如用高能电子轰击来加热。 阴极结构的表面的选定部分相对于表面的未被选择的部分具有改变的特性。 在一个实施例中，改变的特性是曲率。 在另一个实施例中，改变的属性是工作功能。 通过改变表面的选定部分的性质，电子束强度增加，并且宽度减小。

公开(公告)号：US20110058643A1

公开(公告)日：2011-03-10

申请号：US12554164

申请日：2009-09-04

Applicant: Sergio Lamaitre ,  Carey Rogers ,  Yun Zou ,  Jizhong Chen

Inventor： Sergio Lamaitre ,  Carey Rogers ,  Yun Zou ,  Jizhong Chen

IPC: G01N23/04 ,  H01J35/06 ,  H05G1/10 ,  G01N23/08 ,  H01J35/14

CPC classification number: H01J35/04 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/482 ,  H01J35/045 ,  H01J35/06 ,  H01J2235/02 ,  H01J2235/06

Abstract: In one embodiment, an X-ray tube is provided. The X-ray tube comprises at least one thermionic cathode configured to generate an electron beam, a target assembly configured to generate X-rays when impinged with the electron beam emitted from the thermionic cathode, a high voltage supply unit for establishing an output voltage across the thermionic cathode and the target assembly for establishing an accelerating electric field between the thermionic cathode and the target assembly and a mesh grid disposed between the thermionic cathode and the target assembly, the mesh grid configured to operate at a voltage so as to lower the electric field applied at the surface of the thermionic cathode. Further, the voltage at the mesh grid is negatively biased with respect to the voltage at the thermionic cathode.

Abstract translation: 在一个实施例中，提供了X射线管。 所述X射线管包括构造成产生电子束的至少一个热离子阴极，配置成当与从所述热离子阴极发射的电子束碰撞时产生X射线的目标组件，用于建立跨越所述电子束的输出电压的高压电源单元 所述热离子阴极和所述目标组件用于在所述热离子阴极和所述目标组件之间建立加速电场，以及设置在所述热离子阴极和所述目标组件之间的网状网格，所述网状结构被配置为在电压下操作以降低所述电 场施加在热离子阴极的表面。 此外，网格网格处的电压相对于热离子阴极处的电压是负偏置的。

公开(公告)号：US07864925B2

公开(公告)日：2011-01-04

申请号：US12394780

申请日：2009-02-27

Applicant: Wolfgang Kutschera

Inventor： Wolfgang Kutschera

IPC: H01J35/06

CPC classification number: H01J35/06 ,  H01J2235/06

Abstract: A cathode has a cathode head in which is arranged a surface emitter is arranged that emits electrons upon the application of a heating voltage. At least one electrically conductive barrier plate that is galvanically separated from the surface emitter extends up to the surface emitter. This cathode has a longer lifespan, a high electron emission and a good blocking capability.

Abstract translation: 阴极具有阴极头，其中布置有在施加加热电压时发射电子的表面发射器。 与表面发射器电流分离的至少一个导电阻挡板延伸到表面发射器。 该阴极具有更长的寿命，高的电子发射和良好的阻挡能力。

公开(公告)号：US07817781B2

公开(公告)日：2010-10-19

申请号：US12503517

申请日：2009-07-15

Applicant: Peter Wraight ,  Arthur J. Becker ,  Joel L. Groves ,  Christian Stoller

Inventor： Peter Wraight ,  Arthur J. Becker ,  Joel L. Groves ,  Christian Stoller

IPC: G21G4/00 ,  G01B15/02

CPC classification number: H01J35/06 ,  H01J35/14 ,  H01J2235/0233 ,  H01J2235/06 ,  H01J2235/163 ,  H05G1/02 ,  H05G1/10

Abstract: An apparatus and method for determining the density and other properties of a formation surrounding a borehole using a high voltage x-ray generator. One embodiment comprises a stable compact x-ray generator capable of providing radiation with energy of 250 keV and higher while operating at temperatures equal to or greater than 125° C. In another embodiment, radiation is passed from an x-ray generator into the formation; reflected radiation is detected by a short spaced radiation detector and a long spaced radiation detector. The output of these detectors is then used to determine the density of the formation. In one embodiment, a reference radiation detector monitors a filtered radiation signal. The output of this detector is used to control at least one of the acceleration voltage and beam current of the x-ray generator.

Abstract translation: 一种用于使用高压x射线发生器确定围绕钻孔的地层的密度和其它性质的装置和方法。 一个实施例包括能够在等于或大于125℃的温度下工作时能够提供250keV及更高能量的辐射的稳定的紧凑型X射线发生器。在另一个实施例中，辐射从X射线发生器传送到地层 ; 反射辐射由短间隔的辐射检测器和长间隔的辐射检测器检测。 然后使用这些检测器的输出来确定地层的密度。 在一个实施例中，参考辐射检测器监视经滤波的辐射信号。 该检测器的输出用于控制x射线发生器的加速电压和射束电流中的至少一个。

公开(公告)号：US20100195798A1

公开(公告)日：2010-08-05

申请号：US12759621

申请日：2010-04-13

Applicant: James T. Arnold ,  Steve Bandy ,  Gary Virshup

Inventor： James T. Arnold ,  Steve Bandy ,  Gary Virshup

IPC: H01J35/06 ,  H01J1/15 ,  H01J1/16

CPC classification number: H01J35/06 ,  H01J2235/06

Abstract: An apparatus and method comprising a cathode structure which can be a cylindrical filament coiled in a helix or which can be constructed of a ribbon or other suitable shape. The cathode structure can be heated by passage of an electrical current, or by other means such as bombardment with energetic electrons. Selected portions of the surface of the cathode structure have an altered property with respect to the non-selected portions of the surface. In one embodiment, the altered property is a curvature. In another embodiment, the altered property is a work function. By altering the property of the selected portions of the surface, the electron beam intensity is increased, and the width is decreased.

Abstract translation: 一种包括阴极结构的装置和方法，阴极结构可以是以螺旋线圈绕的圆柱形细丝，或者可以由带状物或其它合适的形状构成。 阴极结构可以通过电流加热，或者通过其他手段例如用高能电子轰击来加热。 阴极结构的表面的选定部分相对于表面的未被选择的部分具有改变的特性。 在一个实施例中，改变的特性是曲率。 在另一个实施例中，改变的属性是工作功能。 通过改变表面的选定部分的性质，电子束强度增加，并且宽度减小。

公开(公告)号：US20100074410A1

公开(公告)日：2010-03-25

申请号：US12625374

申请日：2009-11-24

Applicant: Yuichi ITO ,  Toru Moriike ,  Seiji Hosoya ,  Yoshihiko Dan ,  Makoto Otsuka

Inventor： Yuichi ITO ,  Toru Moriike ,  Seiji Hosoya ,  Yoshihiko Dan ,  Makoto Otsuka

IPC: H01J35/18

CPC classification number: H01J35/06 ,  H01J9/26 ,  H01J35/116 ,  H01J35/16 ,  H01J35/186 ,  H01J35/32 ,  H01J2235/023 ,  H01J2235/06 ,  H01J2235/16

Abstract: A transmission type X-ray tube includes an electrode lead holding a cathode filament and a stem unit to which a sealing member, an exhaust tube, and the like are attached by brazing, and an irradiation window frame having an X-ray irradiation window attached by brazing. The other end side of the sealing member is attached to an open end of the irradiation window frame by welding. Thus, it is possible to obtain a high-quality transmission type X-ray tube having a long service life at a low cost.

Abstract translation: 透射型X射线管包括保持阴极丝的电极引线和通过钎焊将密封部件，排气管等附着到其上的杆单元，以及附着有X射线照射窗的照射窗框 通过钎焊。 密封构件的另一端侧通过焊接附接到照射窗框架的开口端。 因此，可以以低成本获得具有长使用寿命的高质量透射型X射线管。

公开(公告)号：US20080257939A1

公开(公告)日：2008-10-23

申请号：US11737111

申请日：2007-04-18

Applicant: Edward Emaci ,  Kent Shue

Inventor： Edward Emaci ,  Kent Shue

IPC: H01J35/04 ,  B23K1/00

CPC classification number: B23K1/0008 ,  H01J2235/06

Abstract: A method is disclosed for brazing components in a structure using a gap setting surface and brazing foil as brazing filler between the parts in order to form uniform joints having optimal dimensions, shape and strength. The components are assembled in an unconstrained stack, and a controlled load is applied to the top of the stack. The stack is then heated to a temperature at which the brazing foil melts and reacts with the components to form the joints. The stack is cooled resulting in a brazed structure having the desired dimension.

Abstract translation: 公开了一种用于在使用间隙设置表面的钎焊部件中钎焊部件的方法，并且在部件之间使用钎焊箔作为钎料，以形成具有最佳尺寸，形状和强度的均匀接头。 组件以无约束的堆叠组装，并且受控的负载施加到堆叠的顶部。 然后将叠层加热到钎焊箔熔化并与组分反应以形成接头的温度。 堆叠被冷却，导致具有所需尺寸的钎焊结构。

公开(公告)号：US20070183577A1

公开(公告)日：2007-08-09

申请号：US11350975

申请日：2006-02-08

Applicant: James Arnold ,  Steve Bandy ,  Gary Virshup

Inventor： James Arnold ,  Steve Bandy ,  Gary Virshup

IPC: H01J35/06

CPC classification number: H01J35/06 ,  H01J2235/06

Abstract: An apparatus and method comprising a cathode structure which can be a cylindrical filament coiled in a helix or which can be constructed of a ribbon or other suitable shape. The cathode structure can be heated by passage of an electrical current, or by other means such as bombardment with energetic electrons. Selected portions of the surface of the cathode structure have an altered property with respect to the non-selected portions of the surface. In one embodiment, the altered property is a curvature. In another embodiment, the altered property is a work function. By altering the property of the selected portions of the surface, the electron beam intensity is increased, and the width is decreased.

Abstract translation: 一种包括阴极结构的装置和方法，阴极结构可以是以螺旋线圈绕的圆柱形细丝，或者可以由带状物或其他合适的形状构成。 阴极结构可以通过电流加热，或者通过其他手段例如用高能电子轰击来加热。 阴极结构的表面的选定部分相对于表面的未被选择的部分具有改变的特性。 在一个实施例中，改变的特性是曲率。 在另一个实施例中，改变的属性是工作功能。 通过改变表面的选定部分的性质，电子束强度增加，并且宽度减小。

公开(公告)号：US20070183576A1

公开(公告)日：2007-08-09

申请号：US11343599

申请日：2006-01-31

Applicant: James Burke ,  Charles Chidester ,  Bruce Cain ,  Robert Treseder ,  James Boye ,  Ray Daly ,  Ricky Smith ,  Paul Christean

Inventor： James Burke ,  Charles Chidester ,  Bruce Cain ,  Robert Treseder ,  James Boye ,  Ray Daly ,  Ricky Smith ,  Paul Christean

IPC: H01J35/06

CPC classification number: H01J35/06 ,  H01J2235/06 ,  H01J2235/1026 ,  H01J2235/1216

Abstract: A cathode assembly including certain features designed to protect the integrity of a filament contained therein is disclosed. In particular, the cathode assembly is configured to prevent damage to the filament should it inadvertently contact another portion of the cathode assembly. In an example embodiment, an x-ray tube incorporating features of the present invention is disclosed. The x-ray tube includes an evacuated enclosure containing a cathode assembly and an anode. The cathode assembly includes a head portion having a head surface. A slot is defined on the head surface and an electron-emitting filament is included in the slot. A protective surface is defined on the head surface proximate to a central portion of the filament. The protective surface in one embodiment is composed of tungsten and is configure to prevent fusing of the filament to the protective surface should the filament inadvertently contact the protective surface.

Abstract translation: 公开了一种阴极组件，其包括设计成保护其中所包含的细丝的完整性的某些特征。 特别地，阴极组件被构造成如果它不经意地接触阴极组件的另一部分，则防止对细丝的损坏。 在示例性实施例中，公开了包含本发明的特征的X射线管。 x射线管包括一个包含阴极组件和一个阳极的真空外壳。 阴极组件包括具有头表面的头部部分。 在头表面上限定狭缝，并且在槽中包括电子发射丝。 保护表面限定在靠近灯丝中心部分的头表面上。 一个实施例中的保护表面由钨组成，并且被配置为当灯丝不经意地接触保护表面时防止灯丝熔合到保护表面。

公开(公告)号：US20040028183A1

公开(公告)日：2004-02-12

申请号：US10358160

申请日：2003-02-05

Inventor： Jianping Lu ,  Otto Zhou ,  Yuan Cheng

IPC: H05G001/34

CPC classification number: H01J35/06 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4028 ,  A61B6/405 ,  A61B6/4488 ,  A61B6/482 ,  B82Y10/00 ,  H01J3/021 ,  H01J35/065 ,  H01J35/08 ,  H01J35/105 ,  H01J35/14 ,  H01J35/22 ,  H01J35/28 ,  H01J35/30 ,  H01J2201/30469 ,  H01J2235/06 ,  H01J2235/062 ,  H01J2235/064 ,  H01J2235/068 ,  H05G1/34

Abstract: Methods and apparatus for independent control of electron emission current and x-ray energy in x-ray tubes are provided. The independent control can be accomplished by adjusting the distance between the cathode and anode. The independent control can also be accomplished by adjusting the temperature of the cathode. The independent control can also be accomplished by optical excitation of the cathode. The cathode can include field emissive materials such as carbon nanotubes.

Abstract translation: 提供了用于独立控制x射线管中的电子发射电流和x射线能量的方法和装置。 独立控制可以通过调节阴极和阳极之间的距离来实现。 独立控制也可以通过调节阴极的温度来实现。 独立控制也可以通过阴极的光学激发来实现。 阴极可以包括诸如碳纳米管的场发射材料。