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公开(公告)号：US20150255201A1
公开(公告)日：2015-09-10
申请号：US14423230
申请日：2012-12-26
Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
Inventor： Young Uk Jeong , Ki Tae Lee , Seong Hee Park , Shang In Shin , Kyuha Jang , Jeong Ho Moon , Nikolay Vinokurov
CPC classification number: H01F7/0221 , H01F1/053 , H05H7/04
Abstract: A variable-period permanent-magnet undulator which is applicable not only to a planar undulator but also to a helical undulator, in which permanent-magnets and ferromagnetic substances are alternately arranged, and the ferromagnetic substance interposed between the permanent-magnets is saturated to thus enable the magnets to be effectively spaced apart from each other by the repulsive force between the permanent-magnets, thereby adjusting the period of the magnetic field in an easy and precise manner.
Abstract translation: 一种可变周期永磁体波动器，其不仅适用于平面波动器，而且可应用于螺旋形波动器，其中永磁体和铁磁物质交替布置，并且介于永磁体之间的铁磁物质饱和 能够通过永久磁铁之间的排斥力使磁体彼此有效地间隔开，从而容易且精确地调整磁场的周期。
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公开(公告)号：US09502166B2
公开(公告)日：2016-11-22
申请号：US14423230
申请日：2012-12-26
Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
Inventor： Young Uk Jeong , Ki Tae Lee , Seong Hee Park , Shang In Shin , Kyuha Jang , Jeong Ho Moon , Nikolay Vinokurov
CPC classification number: H01F7/0221 , H01F1/053 , H05H7/04
Abstract: A variable-period permanent-magnet undulator which is applicable not only to a planar undulator but also to a helical undulator, in which permanent-magnets and ferromagnetic substances are alternately arranged, and the ferromagnetic substance interposed between the permanent-magnets is saturated to thus enable the magnets to be effectively spaced apart from each other by the repulsive force between the permanent-magnets, thereby adjusting the period of the magnetic field in an easy and precise manner.
Abstract translation: 一种可变周期永磁体波动器，其不仅适用于平面波动器，而且可应用于螺旋形波动器，其中永磁体和铁磁物质交替布置，并且介于永磁体之间的铁磁物质饱和 能够通过永久磁铁之间的排斥力使磁体彼此有效地间隔开，从而容易且精确地调整磁场的周期。
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公开(公告)号：US11728125B2
公开(公告)日：2023-08-15
申请号：US17126904
申请日：2020-12-18
Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
Inventor： Young Uk Jeong , Nikolay Vinokurov , Hyun Woo Kim , Ki Tae Lee , Kyuha Jang , Inhyung Baek
IPC: H01J37/14 , H01J37/073
CPC classification number: H01J37/14 , H01J37/073
Abstract: There is provided an ultrafast electron diffraction apparatus including: a photoelectron gun configured to emit an electron beam; a bending portion for emitting the electron beam emitted from the photoelectron gun by changing a travel direction of the electron beam by a predetermined angle; and a sample portion including a sample to be analyzed by the electron beam emitted from the bending portion. The electron beam reaches the sample portion in a state that a pulse of the electron beam is compressed and the timing jitter between the pumping light and probe electron pulse is completely reduced as the travel direction of the electron beam is changed by the predetermined angle through the bending portion.
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公开(公告)号：US10511133B2
公开(公告)日：2019-12-17
申请号：US15750668
申请日：2016-08-11
Applicant: Korea Atomic Energy Research Institute
Inventor： Young Uk Jeong , Boris Gudkov , Nikolay Vinokurov , Ki Tae Lee , Seong Hee Park , Kyuha Jang , Jeong Sang Jo
IPC: H01S1/00 , H01J63/02 , G01N21/3581
Abstract: Provided is a linearly polarized ultra-short terahertz wave generating device which has a parabolic barrel mirror installed at one side of a multiple thin film, to generate an ultra-short terahertz wave having single linear-polarized light and uniformly formed output distribution.
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