Electron Gun, Method of Controlling Same, and Electron Beam Additive Manufacturing Machine
    1.
    发明申请
    Electron Gun, Method of Controlling Same, and Electron Beam Additive Manufacturing Machine 有权
    电子枪,控制方法和电子束添加剂制造机

    公开(公告)号:US20150270088A1

    公开(公告)日:2015-09-24

    申请号:US14621526

    申请日:2015-02-13

    Applicant: JEOL Ltd.

    Inventor: Takashi Satoh

    Abstract: There is disclosed a method of controlling an electron gun without causing decreases in brightness of the electron beam if a current-limiting aperture cannot be used. The electron gun (10) has a cathode (11), a Wehnelt electrode (12), a control electrode (13), an anode (14), and a controller (22). The Wehnelt electrode (12) has a first opening (12c) in which the tip of the cathode is inserted, and focuses thermal electrons emitted from the tip of the cathode (11). The thermal electrons emitted from the tip of the cathode (11) are caused to pass into a second opening (13c) by the control electrode (13). The anode (14) accelerates the thermal electrons emitted from the cathode (11) such that the thermal electrons passed through the second opening (13c) pass through a third opening (14b) and impinge as an electron beam (B1) on a powdered sample (8). The controller (22) sets the bias voltage and the control voltage based on combination conditions of the bias voltage and control voltage to maintain the brightness of the beam constant.

    Abstract translation: 如果不能使用限流孔,则公开了一种控制电子枪而不引起电子束亮度降低的方法。 电子枪(10)具有阴极(11),Wehnelt电极(12),控制电极(13),阳极(14)和控制器(22)。 Wehnelt电极(12)具有插入阴极顶端的第一开口(12c),并聚焦从阴极(11)的尖端发射的热电子。 从阴极(11)的顶端发射的热电子被控制电极(13)通入第二开口(13c)。 阳极(14)加速从阴极(11)发射的热电子,使得穿过第二开口(13c)的热电子通过第三开口(14b)并作为电子束(B1)撞击在粉末样品上 (8)。 控制器(22)基于偏置电压和控制电压的组合条件设置偏置电压和控制电压,以保持光束的亮度恒定。

    Electron gun, method of controlling same, and electron beam additive manufacturing machine
    2.
    发明授权
    Electron gun, method of controlling same, and electron beam additive manufacturing machine 有权
    电子枪,控制方法以及电子束添加剂制造机

    公开(公告)号:US09269520B2

    公开(公告)日:2016-02-23

    申请号:US14621526

    申请日:2015-02-13

    Applicant: JEOL Ltd.

    Inventor: Takashi Satoh

    Abstract: There is disclosed a method of controlling an electron gun without causing decreases in brightness of the electron beam if a current-limiting aperture cannot be used. The electron gun (10) has a cathode (11), a Wehnelt electrode (12), a control electrode (13), an anode (14), and a controller (22). The Wehnelt electrode (12) has a first opening (12c) in which the tip of the cathode is inserted, and focuses thermal electrons emitted from the tip of the cathode (11). The thermal electrons emitted from the tip of the cathode (11) are caused to pass into a second opening (13c) by the control electrode (13). The anode (14) accelerates the thermal electrons emitted from the cathode (11) such that the thermal electrons passed through the second opening (13c) pass through a third opening (14b) and impinge as an electron beam (B1) on a powdered sample (8). The controller (22) sets the bias voltage and the control voltage based on combination conditions of the bias voltage and control voltage to maintain the brightness of the beam constant.

    Abstract translation: 如果不能使用限流孔,则公开了一种控制电子枪而不引起电子束亮度降低的方法。 电子枪(10)具有阴极(11),Wehnelt电极(12),控制电极(13),阳极(14)和控制器(22)。 Wehnelt电极(12)具有插入阴极顶端的第一开口(12c),并聚焦从阴极(11)的尖端发射的热电子。 从阴极(11)的顶端发射的热电子被控制电极(13)通入第二开口(13c)。 阳极(14)加速从阴极(11)发射的热电子,使得穿过第二开口(13c)的热电子通过第三开口(14b)并作为电子束(B1)撞击在粉末样品上 (8)。 控制器(22)基于偏置电压和控制电压的组合条件设置偏置电压和控制电压,以保持光束的亮度恒定。

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