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    • 1. 发明申请
    • THERMIONIC EMISSION DEVICE
    • THERMONIC排放装置
    • US20100181942A1
    • 2010-07-22
    • US12691379
    • 2010-01-21
    • Joerg Freudenberger
    • Joerg Freudenberger
    • H01J1/22H05B41/00
    • H01J1/22H01J2235/06
    • A thermionic emission device, in particular for use in an x-ray tube, has an indirectly heated primary emitter that is fashioned as a flat emitter with an unstructured primary emission surface, and a heating emitter that is fashioned as a flat emitter with a structured heat emission surface. The primary emitter and the heating emitter each has at least two terminal lugs, and the primary emission surface and the heat emission surface are aligned essentially parallel to one another. The emission device provides an optimally high quality of the focal spot with a simple design and, given high thermal load, an unwanted widening or defocusing of the electron beam is avoided by the terminal lugs of the primary emitter being aligned essentially perpendicular to the primary emission surface and not protruding beyond the primary emission surface in the lateral direction.
    • 特别是用于X射线管的热离子发射装置具有间接加热的主发射体,其被形成为具有非结构化初级发射表面的平坦发射体,以及加热发射体,其形成为具有结构化 散热面。 主发射器和加热发射器各自具有至少两个端子凸耳,并且主发射表面和发热表面基本上彼此平行地对准。 发射装置以简单的设计提供焦点的最佳质量,并且在给定高热负荷的情况下,通过主发射极的基本上垂直于初级发射排列的端子凸耳避免了电子束的不需要的加宽或散焦 并且在横向方向上不突出超过主发射表面。
    • 2. 发明授权
    • Cathode structure comprising a heating element
    • 包括加热元件的阴极结构
    • US5729082A
    • 1998-03-17
    • US677243
    • 1996-07-09
    • Franciscus M. M. Snijkers
    • Franciscus M. M. Snijkers
    • H01J1/22H01J29/04H01J31/20
    • H01J1/22
    • A cathode structure comprises at an end portion (1) an electron-emitting material (4) and a heating element (5) of wire (7), said cathode structure having a plurality of primary helical turns (8). These primary turns are used to form a first series of secondary turns (9) which are wound in a first direction with a pitch and which extend towards the end portion (1), and to form a second series of secondary turns (10) which extend from the end portion (1) and which have the opposite direction of winding yet the same pitch. Near the end portion (1), the first and second series of turns (9, 10) are interconnected by an arc-shaped connecting portion (12) having primary turns (8). This arc-shaped connecting portion (12) has a span S.sub.a and a rise r.sub.a, the ratio r.sub.a /S.sub.a preferably ranging from 0.3 to 0.5.
    • 阴极结构包括在电子发射材料(4)的端部(1)和电线(7)的加热元件(5)的端部,所述阴极结构具有多个主螺旋线圈(8)。 这些主匝用于形成第一系列的次级匝(9),它们以节距沿着第一方向缠绕并且朝向端部(1)延伸,并形成第二系列次级匝(10) 从端部部分(1)延伸并且具有相反的卷绕方向相同的间距。 在端部(1)附近,第一和第二匝(9,10)通过具有主匝(8)的弧形连接部分(12)相互连接。 该弧形连接部分(12)具有跨度Sa和上升ra,比值ra / Sa优选为0.3至0.5。
    • 6. 发明授权
    • Indirectly heated cathode
    • 间接加热阴极
    • US4611146A
    • 1986-09-09
    • US336233
    • 1981-12-31
    • Raymond C. Morrison
    • Raymond C. Morrison
    • H01J1/22H01J29/48H01J1/16H01J1/20
    • H01J1/22
    • An indirectly heated cathode including a conductive cup having a closed end provided with an exterior surface coating of electron emissive material and an electrically insulated heater element disposed axially within the cup. The heater element comprises a coaxial pair of outer and inner filamentary coils wound helically in electrical series from a single strand of electrical wire and having integral interconnecting portions adjacent the closed end of the cup for resiliently supporting the inner coil within the outer coil and in alignment with the central portion of the electron emissive coating. The turns of the outer coil are coated with a heat transmissive dielectric material and slidably engage the inner axially extending surface of the cup for positioning the inner coil in alignment with the central portion of the electron emissive coating, maximizing transfer of heat by radiation from the outer coil to the engaged wall of the cup, and providing a thermal barrier to enhance the transfer of heat by radiation from the inner coil to the central portion of the electron emissive coating.
    • 一种间接加热的阴极,其包括具有封闭端的导电杯,所述封闭端设置有电子发射材料的外表面涂层和轴向设置在所述杯内的电绝缘加热元件。 加热器元件包括一对外部和内部丝线状线圈,其从单股电线螺旋形地电连接并且具有与杯子的封闭端部相邻的整体互连部分,用于弹性地支撑内部线圈在外部线圈内并且对齐 与电子发射涂层的中心部分。 外部线圈的匝涂覆有热传导电介质材料,并可滑动地接合杯的内部轴向延伸表面,用于将内部线圈定位成与电子发射涂层的中心部分对齐,从而使来自 外部线圈到杯的接合壁,并且提供热障,以通过辐射从内线圈到电子发射涂层的中心部分来增强热传递。
    • 8. 发明授权
    • Quick operating cathode
    • 快速操作阴极
    • US4379980A
    • 1983-04-12
    • US255637
    • 1981-04-20
    • Yukio TakanashiTooru YakabeShunji Asano
    • Yukio TakanashiTooru YakabeShunji Asano
    • H01J29/04H01J1/22H01J1/24H01J1/20
    • H01J1/22
    • A quick operating type cathode having a cathode body consisting of: a cathode sleeve and a metal substrate which is mounted at the top opening part of the cathode sleeve and the top surface of which is coated with an electron-emissive material; and a double helical coil heater which is inserted within the cathode sleeve and the surface of which is coated with an insulating material, is characterized in that said heater comprises a coil part and a pair of leg parts connected to the end part of said coil part, a dense pitch part is formed at the top of said coil part, a sparse pitch part is formed in said coil part at the side of the leg parts and the amount of said coated insulating material per unit length of the coil wire at said sparse pitch part is larger than that at said dense pitch part.
    • 一种具有阴极体的快速操作型阴极,阴极体由阴极套管和金属基底构成,阴极套管和金属基底安装在阴极套管的顶部开口部分,其顶表面涂覆有电子发射材料; 以及双层螺旋线圈加热器,其插入在阴极套筒内并且其表面涂覆有绝缘材料,其特征在于,所述加热器包括线圈部分和连接到所述线圈部分的端部的一对腿部件 在所述线圈部分的顶部形成密集沥青部分,在腿部侧面的所述线圈部分中形成稀疏节距部分,并且在所述稀疏部分处形成线圈线的每单位长度的所述涂覆绝缘材料的量 节距部分大于所述密集节距部分。
    • 9. 发明授权
    • Thermionic cathode heated by electron bombardment
    • 通过电子轰击加热的热阴极
    • US3928783A
    • 1975-12-23
    • US42310773
    • 1973-12-10
    • HITACHI LTD
    • HOSOKI SHIGERUOHTSUKA MICHIOFUKUHARA SATORU
    • H01J1/22H01J1/20H01J1/94
    • H01J1/20
    • A structure wherein a cathode, which is made of a material, such as lanthanum hexa-borides, prone to react with metals at high temperatures and having a high electron emissivity, is held by a supporter which is made of an electrically insulating material. Concentric metal cylinders are arranged at the outer circumference of the supporter to surround a part of the cathode and a heating coil is arranged in the interstice between the metal cylinders. An electron-emissive metal oxide layer is formed on the inside surface of the inner metal cylinder. Thermions created from the oxide layer strike the cathode, and the cathode is heated by the heat of the electron bombardment.
    • 一种结构,其中由诸如六硼化镧的材料制成的阴极易于与金属在高温下发生并具有高电子发射率的结构由由电绝缘材料制成的支撑体保持。 同心金属圆筒布置在支撑件的外周围以包围阴极的一部分,并且加热线圈布置在金属圆筒之间的空隙中。 在内金属圆筒的内表面上形成电子发射金属氧化物层。 从氧化物层产生的热量撞击阴极,阴极被电子轰击的热量加热。