公开(公告)号：US11638839B2

公开(公告)日：2023-05-02

申请号：US17088714

申请日：2020-11-04

Applicant: Peking University

Inventor： Jungao Zhu ,  Xueqing Yan ,  Chen Lin

IPC: A61N5/10 ,  G01T1/29 ,  G21K5/04 ,  G21G1/10

Abstract: A device and a method for measuring proton beam source position and beamline center are disclosed. The device includes N quadrupole magnets, a laser, a target and a scintillation screen; the target and the scintillation screen are arranged in front of and behind the N-quadrupole lens, respectively; the N-quadrupole lens can be converted to a M-quadrupole lens; the position of proton beam after being focused by the N- or M-quadrupole lens on the scintillation screen is measured; according to the amplification factor and the proton beam position, the offset of the proton beam source from the beamline center, as well as the position of the beamline center on the scintillation screen are calculated; the disclosure can accurately determine the position of the beamline center and the proton beam source by the use of N quadrupole magnets, combined with a scintillation screen.

公开(公告)号：US20210302600A1

公开(公告)日：2021-09-30

申请号：US17088714

申请日：2020-11-04

Applicant: Peking University

Inventor： Jungao Zhu ,  Xueqing Yan ,  Chen Lin

IPC: G01T1/29 ,  G21G1/10 ,  G21K5/04

Abstract: A device and a method for measuring proton beam source position and beamline center are disclosed. The device includes N quadrupole magnets, a laser, a target and a scintillation screen; the target and the scintillation screen are arranged in front of and behind the N-quadrupole lens, respectively; the N-quadrupole lens can be converted to a M-quadrupole lens; the position of proton beam after being focused by the N- or M-quadrupole lens on the scintillation screen is measured; according to the amplification factor and the proton beam position, the offset of the proton beam source from the beamline center, as well as the position of the beamline center on the scintillation screen are calculated; the disclosure can accurately determine the position of the beamline center and the proton beam source by the use of N quadrupole magnets, combined with a scintillation screen.