Korea Atomic Energy Research Institute

Kyuha Jang

Young Uk Jeong

Ki Tae Lee

Nikolay Vinokurov

Seong Hee Park

Hyun Woo Kim

Jeong Ho Moon

Shang In Shin

Inhyung Baek

Boris Gudkov

Jeong Sang Jo

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.

Ultrafast electron diffraction apparatus

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.

Device for generating linearly polarized ultra-short terahertz wave

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.

Variable-cycle permanent-magnet undulator

Growing community of inventors

Daejeon, South Korea

Kyuha Jang