Electron Microscope and Method of Controlling Same

    公开(公告)号:US20170330723A1

    公开(公告)日:2017-11-16

    申请号:US15591331

    申请日:2017-05-10

    Applicant: JEOL Ltd.

    Inventor: Masaki Mukai

    Abstract: There is provided an electron microscope in which a crossover position can be kept constant. The electron microscope (100) includes: an electron source (110) for emitting an electron beam; an acceleration tube (170) having acceleration electrodes (170a-170f) and operative to accelerate the electron beam; a first electrode (160) operative such that a lens action is produced between this first electrode (160) and the initial stage of acceleration electrode (170a); an accelerating voltage supply (112) for supplying an accelerating voltage to the acceleration tube (170); a first electrode voltage supply (162) for supplying a voltage to the first electrode (160); and a controller (109b) for controlling the first electrode voltage supply (162). The lens action produced between the first electrode (160) and the initial stage of acceleration electrode (170a) forms a crossover (CO2) of the electron beam. The controller (109b) controls the first electrode voltage supply (162) such that, if the accelerating voltage is modified, the ratio between the voltage applied to the first electrode (160) and the voltage applied to the initial stage of acceleration electrode (170a) is kept constant.

    Scanning electron microscope
    15.
    发明授权

    公开(公告)号:US09613781B2

    公开(公告)日:2017-04-04

    申请号:US15000305

    申请日:2016-01-19

    Inventor: Masahiro Hayashi

    Abstract: An embodiment of the invention relates to a SEM enabling a surface analysis of a sample at a high throughput. The SEM has an electron gun, an irradiation unit, and a detector. The detector, as a first structure, includes an MCP, an anode, and a dynode. The dynode is set at a potential higher than a potential of an output face of the MCP and the anode is set at a potential higher than that of the dynode. The anode is disposed on the dynode side with respect to an intermediate position between the output face of the MCP and the dynode. The anode has an aperture for letting electrons from the output face of the MCP pass toward the dynode.

    Multifunctional ultrafast electron gun of transmission electron microscope
    17.
    发明授权
    Multifunctional ultrafast electron gun of transmission electron microscope 有权
    多功能超快电子枪透射电子显微镜

    公开(公告)号:US09558909B2

    公开(公告)日:2017-01-31

    申请号:US14395765

    申请日:2014-05-06

    Abstract: The present invention discloses a multifunctional ultrafast electron gun of a transmission electron microscopy. The ultrafast electron gun of a transmission electron microscope comprises: a laser source, an electron gun body and a laser introducing module. The electron gun body comprises: an electron gun sleeve comprising a first section sleeve and a second section sleeve; and, a cathode, an acceleration electrode and an anode arranged in up-down order, wherein the cathode and the acceleration electrode are located within the first section sleeve and the anode is located within the second section sleeve. The laser introducing module includes an introducing module sleeve sealedly connected between the first section sleeve and the second section sleeve and provided with a laser incoming window in a side thereof; and a laser reflective mirror located in the introducing module sleeve, which is configured to face right the laser incoming window and configured adjacent to a central axis of the introducing module sleeve, and the reflective face of which is configured to make an angle of 45° with the central axis of the introducing module sleeve. The multifunctional ultrafast electron gun of a transmission electron microscopy according to the present invention achieve the best coherence performance of the electrons obtained in the case of the photoelectron emission compared with those in the prior art.

    Abstract translation: 本发明公开了一种透射电子显微镜的多功能超快电子枪。 透射电子显微镜的超快电子枪包括:激光源,电子枪体和激光引入模块。 电子枪主体包括:电子枪套筒,包括第一部分套筒和第二部分套筒; 阴极,加速电极和阳极,其以上下顺序排列,其中阴极和加速电极位于第一部分套筒内,阳极位于第二部分套筒内。 激光引入模块包括密封地连接在第一部分套筒和第二部分套筒之间并在其侧面设置有激光进入窗口的引导模块套筒; 以及位于所述引导模块套筒中的激光反射镜,所述激光反射镜被配置为面对所述激光入射窗口的右侧并且被配置成与所述引入模块套筒的中心轴线相邻,并且其反射面被配置为形成45°的角度 与引入模块套筒的中心轴线。 与现有技术相比,根据本发明的透射电子显微镜的多功能超快电子枪实现了在光电子发射的情况下获得的电子的最佳相干性能。

    METHOD OF DETERMINING CRYSTALLOGRAPHIC PROPERTIES OF A SAMPLE AND ELECTRON BEAM MICROSCOPE FOR PERFORMING THE METHOD
    19.
    发明申请
    METHOD OF DETERMINING CRYSTALLOGRAPHIC PROPERTIES OF A SAMPLE AND ELECTRON BEAM MICROSCOPE FOR PERFORMING THE METHOD 审中-公开
    确定样品和电子束显微镜的晶体学性质的方法,用于实施方法

    公开(公告)号:US20170025249A1

    公开(公告)日:2017-01-26

    申请号:US15209988

    申请日:2016-07-14

    Inventor: Giuseppe Pavia

    Abstract: A method of determining crystallographic properties of a sample includes: generating first and second electron beams of electrons having first and second mean kinetic energies, respectively; detecting, for each of first locations of a region of the sample, a two-dimensional spatial distribution of electrons incident onto a detection area while directing the first electron beam onto the first locations; generating, for each of the first locations, first data representing the two-dimensional spatial distribution; detecting, for each of second locations of the region of the sample, a two-dimensional spatial distribution of electrons incident onto the detection area while directing the second electron beam onto the second locations; generating, for each of the second locations, second data representing the two-dimensional spatial distribution; and determining the crystallographic properties for target locations of the region based on the first data of the first locations and the second data of the second locations.

    Abstract translation: 确定样品的晶体学性质的方法包括:分别产生具有第一和第二平均动能的电子的第一和第二电子束; 对于所述样本的区域的每个第一位置,检测入射到检测区域上的电子的二维空间分布,同时将所述第一电子束引导到所述第一位置; 为每个第一位置生成表示二维空间分布的第一数据; 对所述样品区域的第二位置的每一个检测入射到所述检测区域上的电子的二维空间分布,同时将所述第二电子束引导到所述第二位置; 为每个第二位置生成表示二维空间分布的第二数据; 以及基于第一位置的第一数据和第二位置的第二数据来确定区域的目标位置的结晶特性。

    Systems and Methods for Particle Pulse Modulation
    20.
    发明申请
    Systems and Methods for Particle Pulse Modulation 有权
    粒子脉冲调制系统与方法

    公开(公告)号:US20160372300A1

    公开(公告)日:2016-12-22

    申请号:US15244569

    申请日:2016-08-23

    Abstract: Methods and apparatus for modulating a particle pulse include a succession of Hermite-Gaussian optical modes that effectively construct a three-dimensional optical trap in the particle pulse's rest frame. Optical incidence angles between the propagation of the particle pulse and the optical pulse are tuned for improved compression. Particles pulses that can be modulated by these methods and apparatus include charged particles and particles with non-zero polarizability in the Rayleigh regime. Exact solutions to Maxwell's equations for first-order Hermite-Gaussian beams demonstrate single-electron pulse compression factors of more than 100 in both longitudinal and transverse dimensions. The methods and apparatus are useful in ultrafast electron imaging for both single- and multi-electron pulse compression, and as a means of circumventing temporal distortions in magnetic lenses when focusing ultra-short electron pulses.

    Abstract translation: 用于调制粒子脉冲的方法和装置包括一系列Hermite-Gaussian光学模式,其有效地构成了粒子脉冲的休止帧中的三维光阱。 调整粒子脉冲的传播和光脉冲之间的光入射角以改善压缩。 可以通过这些方法和装置调制的粒子脉冲包括带电粒子和在瑞利状态下具有非零极化率的粒子。 针对一阶Hermite-Gaussian光束的麦克斯韦方程的精确解决方案在纵向和横向尺寸上均显示出超过100的单电子脉冲压缩因子。 该方法和装置在用于单电子和多电子脉冲压缩的超快电子成像中是有用的,并且作为在聚焦超短电子脉冲时避开磁性透镜中的时间失真的手段。

Patent Agency Ranking