-
公开(公告)号：US09780426B2
公开(公告)日：2017-10-03
申请号：US15281026
申请日：2016-09-29
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Kejun Kang , Jiaru Shi , Ping Wang , Chuanxiang Tang , Huaibi Chen , Yaohong Liu , Xinshui Yan , Wenhui Huang
Abstract: The present disclosure relates to a phase shifter, an accelerator, and an operating method therefor. The phase shifter comprises a rotating part having a first hollow structure, the first hollow structure having a first cavity, a distance between a circumference of the cross section of the first cavity and a rotation center of the rotating part changing periodically and continuously in a peripheral direction, such that when the rotatory part rotates, a phase shift occurs between two adjacent microwave pulses at an outlet of the phase shifter. The operating method comprises transmitting a microwave pulse within the accelerator at a repetitive frequency v Hertz; the driving devices drives the rotating part to rotate at a rotation speed of n RPM, wherein n=15v*m, m is an odd number, 1, 3, 5 . . . , such that when transmitting a microwave pulse each time, the long axis of the oval cross section of the first cavity of the rotatory part is rotated to a horizontal or vertical state.
-
公开(公告)号：US20170187085A1
公开(公告)日：2017-06-29
申请号：US15281026
申请日：2016-09-29
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Kejun Kang , Jiaru Shi , Ping Wang , Chuanxiang Tang , Huaibi Chen , Yaohong Liu , Xinshui Yan , Wenhui Huang
Abstract: The present disclosure relates to a phase shifter, an accelerator, and an operating method therefor. The phase shifter comprises a rotating part having a first hollow structure, the first hollow structure having a first cavity, a distance between a circumference of the cross section of the first cavity and a rotation center of the rotating part changing periodically and continuously in a peripheral direction, such that when the rotatory part rotates, a phase shift occurs between two adjacent microwave pulses at an outlet of the phase shifter. The operating method comprises transmitting a microwave pulse within the accelerator at a repetitive frequency v Hertz; the driving devices drives the rotating part to rotate at a rotation speed of n RPM, wherein n=15v*m, m is an odd number, 1, 3, 5 . . . , such that when transmitting a microwave pulse each time, the long axis of the oval cross section of the first cavity of the rotatory part is rotated to a horizontal or vertical state.
-
Patent Agency Ranking
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。
-
14.发明授权公开(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：US10386509B2
公开(公告)日：2019-08-20
申请号：US16135873
申请日：2018-09-19
Applicant: Nuctech Company Limited
Inventor： Yumei Chen , Xinshui Yan , Quanwei Song , Wei Yin , Weiqiang Guan
Abstract: The disclosed technology relates to a ray energy calibration device and method, and a ray imaging system. In one aspect, the ray energy calibration device includes a plurality of wheels arranged to be rotatable about a common shaft and each provided with one or more protruding blocks at respective specific positions of an outer circumference thereof. The ray energy calibration device further includes a plurality of calibration members, with each of the calibration members being configured such that through rotation of a corresponding one of the wheels, the calibration member can be moved to a calibration position by the protruding block at a specific position on the outer circumference of the wheel.
-
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
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：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
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.
-
-
-
-
-
-
Search Results
17
records
(took 0.013 seconds)
