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公开(公告)号：US10605687B2
公开(公告)日：2020-03-31
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：US10431415B2
公开(公告)日：2019-10-01
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：US09928985B2
公开(公告)日：2018-03-27
申请号：US15056431
申请日：2016-02-29
Applicant: General Electric Company
Inventor： Sergio Lemaitre
CPC classification number: H01J35/06
Abstract: In the present invention, an X-ray tube is provided including a cathode assembly with a cathode cup, and an emitter disposed within the cup configured to emit an electron beam therefrom. The emitter is formed with a central portion including legs with varying lengths and/or spaces formed therein. The legs including spaces of varying lengths provides additional emissive material at the center of the emitter to better withstand strikes from ions formed within the X-ray tube. The legs of varying overall lengths provides a void in the emitter through which the ions can pass without striking the emitter.
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Patent Agency Ranking
公开(公告)号：US20170287671A1
公开(公告)日：2017-10-05
申请号：US15086257
申请日：2016-03-31
Applicant: General Electric Company
Inventor： Sergio Lemaitre
CPC classification number: H01J35/065 , A61B6/032 , A61B6/40 , A61B6/56 , H01J35/045 , H01J35/06 , H01J35/14
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 emitters for generating an electron beam, where the pair of emitters are disposed in the casing 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, 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：US20170250050A1
公开(公告)日：2017-08-31
申请号：US15056431
申请日：2016-02-29
Applicant: General Electric Company
Inventor： Sergio Lemaitre
CPC classification number: H01J35/06
Abstract: In the present invention, an X-ray tube is provided including a cathode assembly with a cathode cup, and an emitter disposed within the cup configured to emit an electron beam therefrom. The emitter is formed with a central portion including legs with varying lengths and/or spaces formed therein. The legs including spaces of varying lengths provides additional emissive material at the center of the emitter to better withstand strikes from ions formed within the X-ray tube. The legs of varying overall lengths provides a void in the emitter through Which the ions can pass without striking the emitter.
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公开(公告)号：US20160358739A1
公开(公告)日：2016-12-08
申请号：US15168925
申请日：2016-05-31
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Anija M. , Sergio Lemaitre
CPC classification number: H01J35/06 , H01J2235/068
Abstract: An improved cathode assembly is disclosed. The improved cathode assembly provides a deep channel for holding filament that enables generation of small focal spots, but is not limited in achieving larger focal spot sizes. The cathode assembly includes at least one deep channel and a filament arranged in a deep channel. The deep channel is configured in a cathode cup surface of the cathode assembly. The filament is arranged in the deep channel for enabling emission of electron beams from the cathode assembly.
Abstract translation: 公开了改进的阴极组件。 改进的阴极组件提供用于保持灯丝的深通道，其能够产生小焦点，但是不限于实现更大的焦点尺寸。 阴极组件包括布置在深通道中的至少一个深通道和细丝。 深沟道配置在阴极组件的阴极杯表面。 灯丝布置在深通道中，以便能够发射来自阴极组件的电子束。
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公开(公告)号：US09208986B2
公开(公告)日：2015-12-08
申请号：US13672100
申请日：2012-11-08
Applicant: General Electric Company
Inventor： Yun Zou , Carey Shawn Rogers , John Scott Price , Sergio Lemaitre , Mark Alan Frontera , Peter Andras Zavodsky
CPC classification number: H01J35/025 , H01J35/14 , H01J2235/168
Abstract: An X-ray tube assembly includes an electron beam transport tube, a beam tube protection assembly, and a control module. The electron beam transport tube includes an opening configured for passage of an electron beam, and includes an inner surface bounding the opening along a length of the electron beam transport tube. The beam tube protection assembly includes a plurality of beam protection electrode segments disposed within the opening of the electron beam transport tube and configured to protect the inner surface of the electron beam transport tube from contact with the electron beam. The control module is configured to determine a direction of the electron beam responsive to information received from the beam tube protection assembly.
Abstract translation: X射线管组件包括电子束输送管，束管保护组件和控制模块。 电子束传送管包括被构造用于电子束通过的开口，并且包括沿电子束传送管的长度限定开口的内表面。 光束管保护组件包括多个光束保护电极段，其设置在电子束传输管的开口内并被配置为保护电子束传输管的内表面免受与电子束的接触。 控制模块被配置为响应于从束管保护组件接收的信息来确定电子束的方向。
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公开(公告)号：US20140169530A1
公开(公告)日：2014-06-19
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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