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KU-FEL (Kyoto University Free Electron Laser) is a free electron laser (FEL) facility at Institute of Advanced Energy, Kyoto University, Japan. 

Mission of KU-FEL facility is providing intense and wavelength-tunable infrared laser beams to energy related research and developments.

There are two light sources based on electron accelerators. 

#1: Mid-Infrared FEL (MIR-FEL): intense and wavelength tunable MIR laser in the wavelength region from 3.4 to 26 micro-meter. 

#2: THz coherent Undulator Radiation (THz-CUR) source: intense and frequency-tunable THz laser in the frequency region from 0.16 to 0.6 THz. 

Those light sources are open to external users for various application experiments.

In parallel with the user experiments, R&Ds of MIR-FEL and THz-CUR are actively performed in KU-FEL facility.

Accelerator Room                 

https://theta360.com/s/kpsTi6K4Pr7uKAjrQq8wDgdPM

THz-CUR from side           

https://theta360.com/s/nWpWl8UzUiSUVo7GNhhWpxmQS
https://theta360.com/s/kEFRgGZzoqJH9bwCZQdsoDcpM

News

User operation of KU-FEL in FY2022 started. In this fiscal year, 18 external user groups will use KU-FEL for their own researches under the ZE program.

Thanks to the radiation shield enforcement, the maximum electron beam power of KU-FEL was upgraded from 41.2 to 60.0 W.

Heishun Zen, a staff member of KU-FEL won the "Young Researcher Award of the Japanese Society of Infrared Science and Technology" for his achievement of MIR-FEL development and effort for application researches.

An article written by Heishun Zen (KU-FEL) with coauthors was selected as the Highlights of 2020  collection for Applied Physics Express (APEX) and the Japanese Journal of Applied Physics (JJAP).

One of KU-FEL users Mr. Yohei Tanaka won the "Student Presentation Award of the Physical Society of Japan" of the 76th annual meeting for his research using KU-FEL.

One of KU-FEL users, Mr. Yohei Tanaka won the "Best presentation award" of the 41st annual meeting of the Laser Society of Japan" for his research using KU-FEL.

One of KU-FEL users, Mr. Yohei Tanaka won the "Best presentation award" of the Beam Physics Young Scientist Workshop 2020 for his research using KU-FEL.

Heishun Zen, a staff member of KU-FEL was selected as a winner of the 15th (2021) young scientist award of the Physical Society of Japan.

The latest article written by Heishun Zen (KU-FEL) with coauthors ranked first in the most read article of Applied Physics Express for 744 downloads in 10 days after its publication.

The article written by Heishun Zen (KU-FEL) with coauthors was selected as a "Spotlights" article of Applied Physics Express. (screen shot)

One of KU-FEL users, Mr. Yohei Tanaka won the "Best presentation award" of the laser summer school 2020 for his research using KU-FEL.

An article written by Kyohei Yoshida (one of KU-FEL users) with coauthors won "The 5th Best Paper Award of Journal of the Japan Society of Infrared Science and Technology" for his research using KU-FEL.