公开(公告)号：US06831964B1

公开(公告)日：2004-12-14

申请号：US09913591

申请日：2001-08-16

申请人： Pavel Ivanovich Lazarev ,  Oleg Valentinovich Komardin

发明人： Pavel Ivanovich Lazarev ,  Oleg Valentinovich Komardin

IPC分类号： H01J3514

CPC分类号： H01J35/14 ,  H01J35/18 ,  H01J2235/186 ,  H05G1/02

摘要： An x-ray radiation source in which a focused electron beam impinges upon a target positioned in front of the focal point of the electron beam and the radiation emitted by the target travels through the aperture of an aperture diaphragm with the aperture disposed at the focal point of the electron beam.

摘要翻译： 一种x射线辐射源，其中聚焦的电子束照射在位于电子束焦点前方的靶上，并且由目标发射的辐射穿过孔径光阑的孔径，孔设置在焦点 的电子束。

公开(公告)号：US06775354B1

公开(公告)日：2004-08-10

申请号：US09666000

申请日：2000-09-20

申请人： Richard Michael Roffers

发明人： Richard Michael Roffers

IPC分类号： H01J3514

CPC分类号： H05G1/54

摘要： An X-ray tube subsystem including an X-ray tube and a grid voltage supply that reduces high voltage breakdown events. The X-ray tube provides a grid bias connection, a filament bias connection, and an anode bias connection. The grid voltage supply is connected to the grid bias connection and is adapted to produce an ion collection voltage substantially less than an electron beam focus voltage.

摘要翻译： 包括X射线管和电网电压的X射线管子系统，可以减少高压击穿事件。 X射线管提供栅极偏置连接，灯丝偏压连接和阳极偏置连接。 电网电压源连接到电网偏压连接，并且适于产生基本上小于电子束聚焦电压的离子收集电压。

公开(公告)号：US06735282B2

公开(公告)日：2004-05-11

申请号：US10336921

申请日：2003-01-06

申请人： Tadaoki Matsushita ,  Tutomu Inazuru

发明人： Tadaoki Matsushita ,  Tutomu Inazuru

IPC分类号： H01J3514

CPC分类号： H01J35/06 ,  H01J35/14 ,  H01J2235/10

摘要： An X-ray tube 1 includes spacer 8 which is cylindrical so it does not block electrons 80 directed from a grid electrode 72 toward a focusing electrode 25, and which has one end 8b fixed to the grid electrode 72 and the other end 8c abutting against the focusing electrode 25. The distance between the grid electrode 72 and focusing electrode 25 is set to a predetermined distance by the spacer 8.

摘要翻译： X射线管1包括圆柱形的间隔物8，因此不阻挡从栅电极72朝向聚焦电极25引导的电子80，并且具有一个端部8b固定在栅电极72上，另一端8c抵靠 聚焦电极25.栅极72和聚焦电极25之间的距离通过间隔物8设定为预定的距离。

公开(公告)号：US06438207B1

公开(公告)日：2002-08-20

申请号：US09395709

申请日：1999-09-14

申请人： Charles Lynn Chidester ,  Mark Alan Heber

发明人： Charles Lynn Chidester ,  Mark Alan Heber

IPC分类号： H01J3514

CPC分类号： H01J35/14

摘要： An x-ray tube having a cathode and an anode disposed within an evacuated housing is disclosed. The cathode is spaced apart from a target surface formed on the anode and the anode is placed at a positive voltage relative to the cathode so that electrons emitted from the cathode accelerate towards and strike the target surface at a focal spot. The resulting collision produces x-rays. The cathode assembly includes a cathode support base, upon which is mounted a filament for emitting electrons. A first focusing mechanism focuses the emitted electrons into an electron beam. In illustrated embodiments, a pair of deflector plates are also supported upon the cathode support base. Voltage potentials are applied to the deflector plates so as to create a deflection region which alters the trajectory of the electron beam and thereby reposition the focal spot on the anode target. The cathode assembly also includes as secondary focusing mechanism, formed as a focusing aperture, that further focuses the electron beam before it exits the cathode assembly. The focusing aperture has a size and a shape that provides controls the size and the shape of the focal spot. In preferred embodiments, the aperture is formed within a housing that substantially encloses the filament, the deflector plates and the cathode cup. Preferably the housing is at the same electrical potential as the cathode cup. The housing electrically and physically isolates the cathode assembly from the anode, thereby reducing arcing between the two and reducing the amount of heat that is radiated to the cathode.

摘要翻译： 公开了一种具有设置在抽真空壳体内的阴极和阳极的X射线管。 阴极与形成在阳极上的目标表面间隔开，并且阳极相对于阴极被置于正电压，使得从阴极发射的电子在焦点处朝向和撞击目标表面加速。 所产生的碰撞产生X射线。 阴极组件包括阴极支撑基座，在其上安装用于发射电子的灯丝。 第一聚焦机制将发射的电子聚焦成电子束。 在所示实施例中，一对偏转板也支撑在阴极支撑基座上。 电压电位被施加到偏转板，以便产生改变电子束轨迹的偏转区域，从而重新定位阳极靶上的焦斑。 阴极组件还包括形成为聚焦孔的二次聚焦机构，其在离开阴极组件之前进一步聚焦电子束。 聚焦孔径具有尺寸和形状，可以控制焦斑的尺寸和形状。 在优选实施例中，孔形成在壳体内，其基本上围绕灯丝，偏转板和阴极杯。 优选地，壳体处于与阴极杯相同的电位。 壳体电和物理地将阴极组件与阳极隔离，从而减少两者之间的电弧并减少辐射到阴极的热量。

公开(公告)号：US06282263B1

公开(公告)日：2001-08-28

申请号：US09269292

申请日：1999-04-21

申请人： Ulrich Wolfgang Arndt ,  James Victor Percival Long ,  Peter Duncumb

发明人： Ulrich Wolfgang Arndt ,  James Victor Percival Long ,  Peter Duncumb

IPC分类号： H01J3514

CPC分类号： H01J35/14 ,  G21K7/00 ,  H01J2235/087 ,  H01J2235/1204 ,  H01J2235/1262

摘要： An X-ray generator comprises an evacuated and sealed X-ray tube, an electron gun, an X-ray target, an internal electron mask, and an X-ray window consisting of a thin tube of material with low X-ray absorption and high mechanical strength, for example beryllium. The window connects the tube to the target assembly containing the X-ray target. The generator preferably also includes a system for focusing and steering the electron beam onto the target, a cooling system to cool the target material, kinematic mounts to allow precise and repeatable mounting of X-ray devices for focusing the X-ray beam, and X-ray focusing devices of varying configurations and methods. The X-ray generator of the invention produces an X-ray source having a focal spot or line of very small dimensions and is capable of producing a high intensity X-ray beam at a relatively small point of application using a low operating power.

摘要翻译： X射线发生器包括真空密封的X射线管，电子枪，X射线靶，内部电子掩模和由具有低X射线吸收的薄管材料构成的X射线窗口，以及 高机械强度，例如铍。 窗口将管连接到包含X射线靶的目标组件。 该发生器优选还包括用于将电子束聚焦并转向目标的系统，用于冷却目标材料的冷却系统，运动学安装件以允许用于聚焦X射线束的X射线装置的精确和可重复的安装，以及X 具有不同配置和方法的射线聚焦装置。 本发明的X射线发生器产生具有焦点或非常小尺寸的线的X射线源，并且能够使用较低的操作功率在相对较小的应用点处产生高强度X射线束。

公开(公告)号：US06236713B1

公开(公告)日：2001-05-22

申请号：US09179805

申请日：1998-10-27

申请人： Richard B. True ,  James C. Taylor ,  Christopher P. Ferrari ,  Curtis G. Allen ,  Thomas M. Bemis

发明人： Richard B. True ,  James C. Taylor ,  Christopher P. Ferrari ,  Curtis G. Allen ,  Thomas M. Bemis

IPC分类号： H01J3514

CPC分类号： H01J35/06 ,  H01J3/12 ,  H01J35/14

摘要： A variable spot size x-ray tube comprises a cathode having an electron emitting surface providing an electron beam that travels essentially along the tube axis of symmetry to an anode. The anode, spaced from the cathode, includes a target, the front surface of which is disposed at an oblique angle with respect to the axis of symmetry. The potential of the anode is generally positive with respect to that of the cathode. The cathode is heated to a temperature at which electrons are emitted by the thermionic emission process. Current from the cathode can be controlled by varying the cathode temperature if the cathode is operated in the temperature limited region. The incident electron beam forms a spot on the target surface whereupon x-rays are produced in response to impingement of the electron beam on the target. The x-rays propagate outwardly from the target spot through a vacuum window to form a beam of x-radiation outside the x-ray tube. An aperture grid is disposed between the cathode and the anode, and has a central aperture permitting the electron beam to pass therethrough. The aperture grid further has a variable voltage applied to it which may be positive, negative, or equal to the potential of the cathode. The voltage on the control grid is used to control the diameter of the electron beam which impinges upon the target. Specifically, the electron beam diameter varies in correspondence with the variable aperture grid voltage, and selective variation of the electron beam diameter results in a corresponding variation in size of the x-ray imaging spot.

摘要翻译： 可变点尺寸x射线管包括具有电子发射表面的阴极，该电子发射表面提供基本上沿着管对称轴线向阳极行进的电子束。 与阴极间隔开的阳极包括靶，其前表面相对于对称轴线倾斜设置。 阳极的电位通常相对于阴极的电位为正。 将阴极加热到通过热离子发射过程发射电子的温度。 如果阴极在温度限制区域中运行，则可以通过改变阴极温度来控制来自阴极的电流。 入射的电子束在目标表面上形成一个点，因此响应于电子束撞击靶而产生X射线。 x射线从靶点向外传播通过真空窗口，以在x射线管外部形成x辐射束。 孔栅格设置在阴极和阳极之间，并且具有允许电子束通过的中心孔。 孔径栅格还具有施加到其上的可变电压，其可以是正的，负的或等于阴极的电位。 控制网格上的电压用于控制撞击目标的电子束的直径。 具体地，电子束直径与可变孔径栅极电压相对应地变化，并且电子束直径的选择性变化导致x射线成像光斑的尺寸的相应变化。