公开(公告)号：US11152932B2

公开(公告)日：2021-10-19

申请号：US16110355

申请日：2018-08-23

Applicant: Nuctech Company Limited

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

IPC: H03K17/0812 ,  H03K3/57 ,  H03K17/081 ,  H03K17/567 ,  H03K17/06

Abstract: The disclosed technology relates to a gate protection circuit for an Insulated Gate Bipolar Transistor (IGBT), the IGBT being used as a switch device in a solid state pulse modulator based on the MARX generator principle, the gate protection circuit including: a voltage regulator configured to supply a stable voltage to an emitter of the IGBT with respect to the ground for a gate of the IGBT.

公开(公告)号：US10340783B2

公开(公告)日：2019-07-02

申请号：US14008921

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: H02M1/08 ,  H03K7/08 ,  H03K3/57

Abstract: The present invention provides a pulse modulating power source, which comprises: a plurality of discharging modules connected in series during discharging; a plurality of triggers corresponding to said plurality of discharging modules, wherein each trigger provides a trigger signal to the corresponding discharging module to turn it on; a control logic module for controlling the trigger signals so as to turn on said plurality of discharging modules successively with a time delay; an output terminal for outputting a voltage.

公开(公告)号：US20190090336A1

公开(公告)日：2019-03-21

申请号：US16117267

申请日：2018-08-30

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Yaohong Liu ,  Ziran Zhao ,  Jinsheng Liu ,  Huaibi Chen ,  Liang Zhang ,  Dongsheng Zhang

IPC: H05G1/02

Abstract: The disclosed technology relates to an X-ray conversion target. In one aspect, the X-ray conversion target includes target body and a target part arranged within the target body, the target part having a first face configured to produce X-rays. The X-ray conversion target further comprises a cooling passage having a side wall, at least a part of the side wall being consisted of a portion of the target part.

公开(公告)号：US09786465B2

公开(公告)日：2017-10-10

申请号：US14136362

申请日：2013-12-20

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

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

IPC: H01J35/14 ,  H01J35/30

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.

公开(公告)号：US09761404B2

公开(公告)日：2017-09-12

申请号：US14490509

申请日：2014-09-18

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Chuanxiang Tang ,  Huaping Tang ,  Huaibi Chen ,  Wenhui Huang ,  Huayi Zhang ,  Shuxin Zheng ,  Yaohong Liu ,  Jinsheng Liu

IPC: H01J35/06 ,  H01J35/04 ,  H01J35/10 ,  H01J35/14 ,  H01J35/16 ,  G01N23/04

CPC classification number: H01J35/045 ,  G01N23/046 ,  H01J35/06 ,  H01J35/065 ,  H01J35/10 ,  H01J35/14 ,  H01J35/16 ,  H01J2235/087

Abstract: A x-ray apparatus of the present application comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged in a linear array and installed on the wall at one end within the vacuum box, each electron transmitting unit is independent to each other; the electron transmitting unit having: a heating filament; a cathode connected to the heating filament; a grid arranged above the cathode opposing the cathode; anode made of metal and installed at the other end of the vacuum box, and in the direction of length, the anode is parallel to the plane of the grid of the electron transmitting unit, and in the direction of width, the anode has a predetermined angle with respect to the plane of the grid of the electron transmitting unit.