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    RF SOURCE PROTECTION
    1.
    发明公开
    RF SOURCE PROTECTION 审中-公开

    公开(公告)号：US20230380049A1

    公开(公告)日：2023-11-23

    申请号：US18247992

    申请日：2021-10-08

    Applicant: ELEKTA LIMITED

    Inventor： Ian Shinton ,  Peter Doherty ,  Emma WOOLRIDGE

    IPC: H05H9/02 ,  H01J25/54 ,  H01J23/207

    CPC classification number: H05H9/02 ,  H01J25/54 ,  H01J23/207 ,  H05H2277/11

    Abstract: A method of determining a design of a transmission waveguide, the method comprising: providing a system comprising a transmission waveguide connected at a first end thereof to an RF source; generating an electromagnetic field in the system by application of RF energy of a harmonic frequency of the RF source to the transmission waveguide; determining whether a reference location in the RF source meets a requirement relating directly or indirectly to an electromagnetic field in the RF source; and if the requirement is met, outputting the current design of the transmission waveguide as its design.

    CAVITY-ENHANCED FOURIER TRANSFORM SPECTROSCOPY FOR CHIRAL ANALYSIS
    3.
    发明申请
    CAVITY-ENHANCED FOURIER TRANSFORM SPECTROSCOPY FOR CHIRAL ANALYSIS 审中-公开

    公开(公告)号：US20190302015A1

    公开(公告)日：2019-10-03

    申请号：US16344688

    申请日：2017-10-25

    Applicant: University of Virginia Patent Foundation

    Inventor： Brooks Hart Pate

    IPC: G01N21/3586 ,  G01N22/00 ,  H01J23/207

    Abstract: A chiral molecule can be defined as a molecule that has a non-superimposable mirror image. These mirror images can be referred to as enantiomers. The enantiomers generally have the same set of bond lengths and bond angles in their three-dimensional geometry. Apparatus and techniques described herein can be used to perform analysis of chiral molecules using cavity-enhanced molecular rotational spectroscopy. A sample cell can define a resonant cavity, and a sample introduction port can provide pulse jet injection of an analyte molecule and a chiral tag to allow analysis of a complex comprising the analyte and chiral tag.

    High frequency vacuum tube with closely spaced cathode and non-emissive grid
    4.
    发明授权
    High frequency vacuum tube with closely spaced cathode and non-emissive grid 失效
    高频真空管具有紧密间隔的阴极和非发射栅格

    公开(公告)号：US5767625A

    公开(公告)日：1998-06-16

    申请号：US632589

    申请日：1996-04-15

    Applicant: Merrald B. Shrader ,  Andrew A. Haase

    Inventor： Merrald B. Shrader ,  Andrew A. Haase

    IPC: H01J25/00 ,  H01J23/00 ,  H01J23/065 ,  H01J23/12 ,  H01J23/14 ,  H01J23/207 ,  H01J23/36 ,  H01J23/46 ,  H01J23/54 ,  H01J25/04 ,  H01J25/02

    CPC classification number: H01J23/12 ,  H01J23/005 ,  H01J23/065 ,  H01J23/14 ,  H01J23/207 ,  H01J23/36 ,  H01J23/54 ,  H01J25/04

    Abstract: A vacuum tube for handling an r.f. signal having a predetermined frequency range comprises a cathode, a heater, and a non-electron emissive grid. The grid is positioned from the cathode by the distance an emitted electron from the cathode can travel in a quarter cycle of the r.f. signal. Outer and inner metal tubes forming a resonant line of a signal coupler are respectively connected to the grid and cathode. R.F. absorbers absorb r.f. fields in an interaction region between an anode and the grid. In one embodiment a coupling loop is between metal tubes at an end of the tubes spaced n.lambda./4 from the grid and cathode. In a second embodiment the coupler includes a coaxial line having an inner conductor connected to a first metal face, spaced from a second opposed metal face by a solid dielectric. An outer conductor is connected to a third metal face, spaced from a fourth opposed metal face by the dielectric. The third and fourth faces surround the first and second faces. The first and third faces are at ground potential while the second and fourth faces are at high negative DC voltages. The second and fourth faces are respectively at common ends of interior and exterior coaxial metal tubes forming a .lambda./2 coupler. Hollow inductive structures extend between the inner and outer metal tubes and at different locations along the tubes. Bias leads may be inserted into the inductive structures for shielding.

    Abstract translation: 一个用于处理r.f.的真空管 具有预定频率范围的信号包括阴极，加热器和非电子发射栅格。 栅极从阴极定位发射的电子从阴极可以在r.f的四分之一周期内行进的距离。 信号。 形成信号耦合器的谐振线路的外部和内部金属管分别连接到栅极和阴极。 R.F. 吸收体吸收r.f. 在阳极和栅格之间的相互作用区域中的场。 在一个实施例中，耦合回路位于与栅极和阴极间隔开nλ/ 4的管的端部处的金属管之间。 在第二实施例中，耦合器包括同轴线，其具有连接到第一金属面的内部导体，通过固体电介质与第二相对的金属表面间隔开。 外部导体连接到第三金属表面，通过电介质与第四相对的金属表面间隔开。 第三和第四面围绕第一和第二面。 第一和第三面处于接地电位，而第二和第四面处于高负的直流电压。 第二和第四面分别在形成λ/ 2耦合器的内部和外部同轴金属管的共同端部。 空心电感结构在内金属管和外金属管之间以及沿着管的不同位置延伸。 偏置引线可以插入到用于屏蔽的感应结构中。

    Combination tuner and second harmonic suppressor for extended interaction klystron
    5.
    发明授权
    Combination tuner and second harmonic suppressor for extended interaction klystron 失效
    组合调谐器和二次谐波抑制器，用于扩展相互作用的速调管

    公开(公告)号：US5504393A

    公开(公告)日：1996-04-02

    申请号：US235498

    申请日：1994-04-29

    Applicant: Mark F. Kirshner

    Inventor： Mark F. Kirshner

    IPC: H01J23/207 ,  H01J23/54 ,  H01J23/20

    CPC classification number: H01J23/207 ,  H01J23/54

    Abstract: A combination tuner and harmonic suppressor apparatus is provided for a klystron having a gap defined across a resonant cavity. The apparatus comprises a back cavity coupled to the resonant cavity by a coupling iris. Harmonic resonances within the resonant cavity are conducted to the back cavity through the coupling iris. An absorber disposed within the back cavity absorbs and attenuates the energy of the harmonic resonances. The coupling iris can be capacitively tuned to optimally conduct the harmonic frequencies into the back cavity. The apparatus further comprises an open-ended diaphragm providing a wall of the resonant cavity, disposed between the back cavity and the resonant cavity. A bellows provides a barrier between a vacuum environment within the klystron and a non-vacuum environment external to the klystron, and enables a broad range of movement of the diaphragm.

    Abstract translation: 提供了一种组合调谐器和谐波抑制器装置，用于具有跨谐振腔限定的间隙的速调管。 该装置包括通过耦合光阑耦合到谐振腔的后腔。 谐振腔内的谐波谐振通过耦合光阑传导到后腔。 设置在后腔内的吸收体吸收和衰减谐波谐振的能量。 耦合光圈可以电容调节，以最佳地将谐波频率传导到后腔。 该装置还包括设置在后腔和谐振腔之间的提供谐振腔的壁的开口端隔膜。 波纹管在速调管之间的真空环境和速调管外部的非真空环境之间提供了屏障，并且能够实现膜片的宽范围的移动。

    Quasi-optical gyrotron
    6.
    发明授权
    Quasi-optical gyrotron 失效
    准光学陀螺仪

    公开(公告)号：US5052003A

    公开(公告)日：1991-09-24

    申请号：US531104

    申请日：1990-05-31

    Applicant: Hans-Gunter Mathews

    Inventor： Hans-Gunter Mathews

    IPC: H01J25/00 ,  H01J23/207 ,  H01J25/02

    CPC classification number: H01J23/207 ,  H01J25/025

    Abstract: In a quasi-optical gyrotron, two coils (3a, 3b) in a Helmholtz arrangement generrate a static magnetic field aligned parallel to an electron beam axis (2). As a result, the electrons passing along the electron beam axis (2) parallel to the magnetic field are forced into gyration and excite an alternating electromagnetic field in a quasi-optical resonator. The resonator comprises two mirrors (4a, 4b) arranged opposite to one another on a resonator axis (5). The resonator axis (5) is aligned perpendicularly to the electron beam axis (2) between the two coils (3a, 3b). The mirrors exhibit a mutual distance which is much greater than one half wavelength of the electromagnetic radiation. To generate a wideband radiation, at least one mirror, (4b) is moved at a high frequency by at least about one half wavelength of the electromagnetic radiation by a vibrator (10).

    Abstract translation: 在准光学陀螺仪中，亥姆霍兹布置中的两个线圈（3a，3b）产生平行于电子束轴线（2）排列的静态磁场。 结果，沿着电子束轴（2）平行于磁场的电子被强制转动并在准光谐振器中激发交变电磁场。 谐振器包括在谐振器轴线（5）上彼此相对布置的两个反射镜（4a，4b）。 谐振器轴线（5）垂直于两个线圈（3a，3b）之间的电子束轴线（2）排列。 反射镜呈现远远大于电磁辐射的一半波长的相互距离。 为了产生宽带辐射，至少一个反射镜（4b）通过振动器（10）以高频率移动至少约一半的电磁辐射波长。

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