公开(公告)号：US20210204390A1

公开(公告)日：2021-07-01

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

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.

公开(公告)号：US20200253033A1

公开(公告)日：2020-08-06

申请号：US16727639

申请日：2019-12-26

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED ,  NuRay Technology Co., Ltd

Inventor： Yuanjing LI ,  Yaohong LIU ,  Huaping TANG ,  Jinsheng LIU ,  Xiying LIU ,  Zhanfeng QIN ,  Wei JIA ,  Jinsong PAN

IPC: H05G1/32 ,  H02M3/28 ,  H02M7/10 ,  H05G1/20

Abstract: Embodiments of the present disclosure disclose a multi-output high-voltage power supply including a channel selection circuit (103) including a plurality of switches; and a high-voltage power supply module (101) connected to the channel selection circuit (103), wherein the high-voltage power supply module (101) includes a fine adjusting power supply component (110) and a plurality of coarse adjusting power supply components (120-1 to 120-N) connected in series, wherein one high-voltage output terminal of the high-voltage power supply module (101) is connected to a common terminal of the channel selection circuit (103), and the other high-voltage output terminal of the high-voltage power supply module (101) is grounded through a current sampling resistor.

公开(公告)号：US20200137868A1

公开(公告)日：2020-04-30

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: H05H7/02 ,  H03K7/08 ,  H02H9/02

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.

公开(公告)号：US20190170894A1

公开(公告)日：2019-06-06

申请号：US16253221

申请日：2019-01-22

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Kejun KANG ,  Yaohong LIU ,  Ziran ZHAO ,  Wei JIA ,  Jianping GU ,  Chuanxiang TANG ,  Huaibi CHEN ,  Jianjun GAO ,  Wei YIN ,  Xiying LIU

IPC: G01V5/00 ,  G01T1/29 ,  G01N23/04

Abstract: This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. The scanning method includes obtaining detection data of an object to be inspected under radiation scanning using a detector, adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.