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公开(公告)号：US20180144902A1
公开(公告)日：2018-05-24
申请号：US15820899
申请日：2017-11-22
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Sergio Lemaitre
Abstract: In the present invention, a cathode is formed with one or more emitters energized to emit electrons that are accelerated towards an anode or target spaced from the cathode. Between the cathode and the target is disposed an ion barrier electrode defining an aperture therein disposed in alignment with the emitters to enable the electron beam to pass through the electrode. The barrier electrode is operably connected to a voltage supply to positively bias the barrier electrode, and the barrier electrode is shaped to minimize the required supply voltage. This positive voltage bias creates a positive potential barrier across the electrode sufficient to repel positive ions generated by the electron beam, protecting the cathode from contact with the ions and increasing the stability of the focal spot generated by the tube by maintaining the ions within the drift region between the ion barrier and the target.
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公开(公告)号：US20180096816A1
公开(公告)日：2018-04-05
申请号：US15820955
申请日：2017-11-22
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Sergio Lemaitre
CPC classification number: H01J35/14 , A61B6/032 , A61B6/40 , H01J35/045 , H01J35/06 , H01J35/065 , H01J35/08
Abstract: In the present invention, a computed tomography system, an X-ray tube used therein and a cathode assembly disposed in the X-ray tube, as well as an associated method of use, is provided that includes a gantry and the X-ray tube coupled to the gantry. The X-ray tube includes the cathode assembly having a pair of emission surfaces for generating an electron beam, where the pair of emission surfaces are disposed in the cathode assembly at angles with respect to one another. The X-ray tube further includes a focusing electrode for focusing the electron beam, an extraction electrode which electrostatically controls the intensity of the electron beam by adjustment of a positive or negative biasing voltage applied to the extraction electrode, a target for generating X-rays when impinged upon by the electron beam and a magnetic focusing assembly located between the cathode assembly and the target for focusing the electron beam towards the target.
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公开(公告)号：US09443691B2
公开(公告)日：2016-09-13
申请号：US14144187
申请日：2013-12-30
Applicant: General Electric Company
Inventor： Vance Scott Robinson , Carey Shawn Rogers , Sergio Lemaitre , Mark Alan Frontera , Sergiy Zalyubovskiy , Xi Zhang
IPC: H01J35/06 , H01J29/48 , H01J29/04 , H01L23/367 , H01L23/373 , H01J3/26 , H01J29/00 , H01L33/44 , H01L33/64 , H01L23/31 , H01J1/14 , H01J1/15
CPC classification number: H01J29/484 , H01J1/14 , H01J1/15 , H01J3/26 , H01J29/006 , H01J29/04 , H01J29/485 , H01J35/06 , H01L23/3178 , H01L23/367 , H01L23/373 , H01L23/3736 , H01L23/3738 , H01L33/44 , H01L33/641 , H01L33/642 , H01L2924/0002 , Y10T428/24612 , Y10T428/24802 , Y10T428/24826 , Y10T428/24942 , Y10T428/2495 , H01L2924/00
Abstract: Embodiments of the disclosure relate to electron emitters for use in conjunction with X-ray emitting devices. In certain embodiments the emitter includes features that prevent, limit, or control deflection of the electron emitter at operating temperatures. In this manner, the electron emitter may be kept substantially flat or at a desired curvature during operation.
Abstract translation: 本公开的实施例涉及与X射线发射装置结合使用的电子发射器。 在某些实施例中，发射器包括防止，限制或控制电子发射器在工作温度下的偏转的特征。 以这种方式，电子发射器可以在操作期间保持基本上平坦或处于期望的曲率。
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公开(公告)号：US20160035532A1
公开(公告)日：2016-02-04
申请号：US14446699
申请日：2014-07-30
Applicant: General Electric Company
Inventor： Sergio Lemaitre , Ben David Poquette , Ryan James Lemminger , Donald Robert Allen , Judson Sloan Marte , Gregory Alan Steinlage , Richard Michael Roffers
CPC classification number: H01J35/06
Abstract: An emitter for a cathode of an X-ray tube is provided that includes a shaped emitting surface. The emitting surface is shaped in a suitable process in order to enable the emitting surface to focus electron beams emitted from the emitting surface on a focal spot on a target of less than 1.0 mm without the need for any additional focusing elements in the X-ray tube.
Abstract translation: 提供了一种用于X射线管的阴极的发射器，其包括成形的发射表面。 发射表面被成形为合适的工艺，以便使得发射表面能够将发射表面发射的电子束聚焦在小于1.0mm的靶上的焦斑上，而不需要X射线中的任何附加的聚焦元件 管。
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公开(公告)号：US09953797B2
公开(公告)日：2018-04-24
申请号：US14867396
申请日：2015-09-28
Applicant: General Electric Company
Inventor： Xi Zhang , Mark Alan Frontera , Sergio Lemaitre , John Scott Price , Uwe Wiedmann
Abstract: A flat emitter configured for use in an X-ray tube is presented. The X-ray tube includes a first conductive section including a first terminal. Further, the X-ray tube includes a second conductive section including a second terminal. Also, the X-ray tube includes a third conductive section disposed between the first conductive section and the second conductive section, wherein the third conductive section is configured to emit electrons toward a determined focal spot, and wherein the third conductive section includes a plurality of slits subdividing the third conductive section into a winding track coupled to the first conductive section and the second conductive section, wherein at least two of the plurality of slits are interwound spirally to compose the winding track, and wherein the winding track is configured to expand and contract based on heat provided to the third conductive section.
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Patent Agency Ranking
公开(公告)号：US20170248485A1
公开(公告)日：2017-08-31
申请号：US15056505
申请日：2016-02-29
Applicant: General Electric Company
Abstract: In the present invention, a pressure measurement device for determining the vacuum level within the evacuated housing of a vacuum electrode device is provided that includes an electrically conductive enclosure secured to an interior surface of the housing, an electrically conductive electrode extending through an aperture in the housing, the electrode having a tip at one end positioned within the interior of the housing inside the enclosure to define a gap between the tip and the enclosure and a conductive lead at a second end disposed outside of the housing, and a voltage source connected to the conductive lead to supply a voltage potential to the tip of the electrode. A voltage difference produced between the electrode and the enclosure ionizes gas within the enclosure causing a measurable current to flow between the electrode and the enclosure which can be used to determine the vacuum level in the housing.
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公开(公告)号：US09711321B2
公开(公告)日：2017-07-18
申请号：US14586066
申请日：2014-12-30
Applicant: General Electric Company
Inventor： Sergio Lemaitre
IPC: H01J35/06 , H01J37/063 , H01J19/10 , H01J3/38 , H01J19/48
CPC classification number: H01J35/06 , H01J3/38 , H01J19/10 , H01J19/48 , H01J37/063 , H01J2229/4844 , H01J2229/4896 , H01J2235/06
Abstract: In the present invention, a cathode for an x-ray tube is formed with a large area flat emitter. To reduce aberrations to a minimum the emission area in the flat emitter has a non-rectangular shape and focusing pads arranged around the emitter. In an exemplary embodiment, the flat emitter has a non-rectangular polygonal shape for an emission area on the emitter in order to increase the emission current from the emitter at standard voltage levels without the need to run the emitters at a higher temperature, add additional emitters to the cathode and/or to coat the emitters with a low work function material.
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公开(公告)号：US20170092456A1
公开(公告)日：2017-03-30
申请号：US14867396
申请日：2015-09-28
Applicant: General Electric Company
Inventor： Xi Zhang , Mark Alan Frontera , Sergio Lemaitre , John Scott Price , Uwe Wiedmann
Abstract: A flat emitter configured for use in an X-ray tube is presented. The X-ray tube includes a first conductive section including a first terminal. Further, the X-ray tube includes a second conductive section including a second terminal. Also, the X-ray tube includes a third conductive section disposed between the first conductive section and the second conductive section, wherein the third conductive section is configured to emit electrons toward a determined focal spot, and wherein the third conductive section includes a plurality of slits subdividing the third conductive section into a winding track coupled to the first conductive section and the second conductive section, wherein at least two of the plurality of slits are interwound spirally to compose the winding track, and wherein the winding track is configured to expand and contract based on heat provided to the third conductive section.
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公开(公告)号：US09224572B2
公开(公告)日：2015-12-29
申请号：US13718672
申请日：2012-12-18
Applicant: General Electric Company
Inventor： Mark Alan Frontera , John Scott Price , Sergio Lemaitre , Yun Zou , Peter Andras Zavodszky
CPC classification number: H01J35/14 , H01J35/045
Abstract: An X-ray tube assembly is provided including an emitter configured to emit an electron beam, an emitter focusing electrode, an extraction electrode, and a downstream focusing electrode. The emitter focusing electrode is disposed proximate to the emitter and outward of the emitter in an axial direction. The extraction electrode is disposed downstream of the emitter and the emitter focusing electrode. The extraction electrode has a negative bias voltage setting at which the extraction electrode has a negative bias voltage with respect to the emitter. The downstream focusing electrode is disposed downstream of the extraction electrode, and has a positive bias voltage with respect to the emitter. When the extraction electrode is at the negative bias voltage setting, the electron beam is emitted from an emission area that is smaller than a maximum emission area from which electrons may be emitted.
Abstract translation: 提供了包括发射电子束的发射极，发射极聚焦电极，引出电极和下游聚焦电极的X射线管组件。 发射极聚焦电极在轴向方向上靠近发射极和发射极的外侧设置。 引出电极设置在发射极和发射极聚焦电极的下游。 提取电极具有负偏置电压设置，在该设置下，引出电极相对于发射极具有负偏置电压。 下游聚焦电极设置在引出电极的下游，并且相对于发射极具有正偏置电压。 当提取电极处于负偏置电压设置时，电子束从小于可从其发射电子的最大发射区域的发射区域发射。
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公开(公告)号：US20150311025A1
公开(公告)日：2015-10-29
申请号：US14264075
申请日：2014-04-29
Applicant: General Electric Company
Inventor： Yun Zou , Carey Shawn Rogers , Sergio Lemaitre , Mark Alan Frontera , Xi Zhang
IPC: H01J35/02
CPC classification number: H01J35/06 , H01J35/065
Abstract: An emitter device having an emission surface includes a plurality of ligaments configured to emit electrons in response to an applied electric field resulting from an applied electrical voltage. Further, the emitter device includes a plurality of slots configured to provide physical separation between two or more adjacently disposed ligaments of the plurality of ligaments, where one or more slots of the plurality of slots define an electrical path. Moreover, the emitter device includes a low work function layer disposed on at least a portion of a ligament of the plurality of ligaments.
Abstract translation: 具有发射表面的发射器件包括多个韧带，其配置为响应于由所施加的电压产生的施加电场而发射电子。 此外，发射器装置包括被配置为在多个韧带的两个或更多相邻设置的韧带之间提供物理分离的多个槽，其中多个槽中的一个或多个狭槽限定电路径。 此外，发射器装置包括设置在多个韧带的韧带的至少一部分上的低功函数层。
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