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    Method, apparatus and system for controlling standing wave linear accelerator
    1.
    发明授权
    Method, apparatus and system for controlling standing wave linear accelerator 有权

    公开(公告)号：US11737202B2

    公开(公告)日：2023-08-22

    申请号：US17247800

    申请日：2020-12-23

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Yaohong Liu ,  Jinsheng Liu ,  Wei Jia ,  Wei Yin ,  Feng Gao ,  Xiying Liu ,  Haokun Wang

    IPC: H05H9/04 ,  H05H7/02

    CPC classification number: H05H9/04 ,  H05H7/02 ,  H05H2007/027

    Abstract: Embodiments of the disclosed technology provide an apparatus for controlling a standing wave linear accelerator. An example standing wave linear accelerator includes an accelerating tube, a motor, and a microwave power source connected between the accelerating tube and the motor. An example apparatus includes a main processor configured to receive an envelope signal of a reflected wave signal output by the accelerating tube, determine whether an amplitude of the envelope signal is greater than an envelope threshold, and if it is determined that the amplitude of the envelope signal is less than the envelope threshold, determine whether to change a rotation direction of the motor by comparing the amplitude of the envelope signal with an envelope reference signal stored in a memory. The memory is connected to the main processor and is configured to store the envelope threshold and the envelope reference signal.

    APPARATUS AND METHOD FOR VOLTAGE ALTERNATING PULSE OUTPUT
    3.
    发明申请
    APPARATUS AND METHOD FOR VOLTAGE ALTERNATING PULSE OUTPUT 有权
    电压交替脉冲输出的装置和方法

    公开(公告)号：US20140077619A1

    公开(公告)日：2014-03-20

    申请号：US14116074

    申请日：2012-12-28

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Yaohong Liu ,  Chuanxiang Tang ,  Xinshui Yan ,  Wei Jia ,  Jianjun Gao ,  Jinsheng Liu ,  Wei Yin ,  Xiying Liu ,  Hao Shi

    IPC: H03K3/57

    CPC classification number: H03K3/57 ,  H02M1/088 ,  H02M2003/077 ,  H03K3/64

    Abstract: The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.

    Abstract translation: 本发明提供一种基于交替组触发的高电压脉冲调制电源，包括：用于向高电压脉冲调制电源供电的直流稳压电压源; 多个固态开关; 与所述多个固态开关相对应的多个触发器，其中每个触发器向其对应的固态开关提供触发信号以打开所述对应的固态开关，其中所述多个触发器被分成至少两个组 的触发器 时间控制模块，其在时间t1控制所述多个触发器以产生触发信号，以同时接通所述多个固态开关，并且在时间t2，控制一组所述至少两组 触发器产生触发信号以打开与该组触发相对应的固态开关，其中时间t1和时间t2交替出现。

    APPARATUSES AND METHODS FOR GENERATING DISTRIBUTED X-RAYS
    5.
    发明申请
    APPARATUSES AND METHODS FOR GENERATING DISTRIBUTED X-RAYS 有权
    用于产生分布式X射线的装置和方法

    公开(公告)号：US20140185776A1

    公开(公告)日：2014-07-03

    申请号：US14136362

    申请日：2013-12-20

    Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

    Inventor： Yuanjing Li ,  Yaohong Liu ,  Jinsheng Liu ,  Huaping Tang ,  Chuanxiang Tang ,  Huaibi Chen ,  Xinshui Yan

    IPC: H01J35/14

    CPC classification number: H01J35/14 ,  H01J35/16 ,  H01J35/30 ,  H01J2235/16

    Abstract: An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.

    Abstract translation: 一种生成分布式X射线的装置和方法。 真空中使用电子枪的热阴极来产生具有一定的初始移动能量和速度的电子束。 用初始低能电子束进行周期性扫描，从而使其相互偏转。 电流限制装置沿着往复偏转的方向设置在电子束的行进路径中。 通过排列在限流装置上的阵列中的通孔，只有部分针对特定位置的电子束可以通过以形成分布在阵列中的顺序电子束电流。 这些电子束电流通过高电压电场加速以获得高能量，轰击阳极靶，从而顺序地产生在阳极靶上分布在阵列中的相应聚焦点和x射线。

    Filament power supply for electron accelerator and electron accelerator
    6.
    发明授权
    Filament power supply for electron accelerator and electron accelerator 有权

    公开(公告)号：US10694616B2

    公开(公告)日：2020-06-23

    申请号：US16667849

    申请日：2019-10-29

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Jinsheng Liu ,  Yaohong Liu ,  Wei Jia ,  Xinshui Yan ,  Wei Li

    IPC: H01J7/44 ,  H05H7/02 ,  H02H9/02 ,  H03K7/08 ,  H01J37/248

    Abstract: The present disclosure provides a filament power supply for an electron accelerator and an electron accelerator. The filament power supply includes: a rectifier circuit configured to convert a power frequency AC voltage signal into a DC voltage signal; an inverter circuit configured to convert the DC voltage signal into an AC voltage signal; a sampling circuit configured to sample the AC voltage signal to obtain a current sampling signal or a voltage sampling signal; a pulse width modulation control chip configured to adjust a pulse width modulation signal until a voltage of the current sampling signal is equal to that of a reference current signal, or a voltage of the voltage sampling signal is equal to that of a reference voltage signal; a modulation circuit configured to modulate the power frequency AC voltage signal to obtain a modulation signal and output the pulse width modulation signal and the modulation signal.

    Apparatus and method for voltage alternating pulse output
    7.
    发明授权
    Apparatus and method for voltage alternating pulse output 有权

    公开(公告)号：US09843313B2

    公开(公告)日：2017-12-12

    申请号：US14116074

    申请日：2012-12-28

    Applicant: Nuctech Company Limited ,  Tsinghua University

    Inventor： Yaohong Liu ,  Chuanxiang Tang ,  Xinshui Yan ,  Wei Jia ,  Jianjun Gao ,  Jinsheng Liu ,  Wei Yin ,  Xiying Liu ,  Hao Shi

    IPC: H03K3/57 ,  H03K3/64 ,  H02M1/088 ,  H02M3/07

    CPC classification number: H03K3/57 ,  H02M1/088 ,  H02M2003/077 ,  H03K3/64

    Abstract: The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.

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