CERN Accelerating science

Article
Title	Renewal of KU-FEL Facility
Author(s)	Kii, Toshiteru ; Hayakawa, Kazushi ; Masuda, Kai ; Murakami, Shio ; Ohgaki, Hideaki ; Yamazaki, Tetsuo ; Yoshikawa, Kiyoshi ; Zen, Heishun
Affiliation	(Kyoto University, Kyoto)
Publication	2004
In:	26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. TUPOS22
Subject category	Accelerators and Storage Rings
Abstract	Users demands to a high power tunable IR laser are increasing in Japan in energy-related science, such as basic study of high-efficiency solar cells, generation of new energy source of alcohol and/or H<sub>2</sub> from polluted gas, and separation of DNA and/or RNA. To satisfy these demands, we decided to renew our FEL facility more user friendly and to operate more flexibly. Construction and fundamental studies on the KU-FEL have been carried out at a building of Institute of Chemical Research where few other accelerators are operating. Therefore, available machine time for our experiments is quite limited. We are now modifying the room by adding concrete walls of 2-m thickness and some space for users will be available. The present FEL system will be moved to the room A photocathode RF-gun system will be nearly added to the system and the present thermionic RF-gun will be used ternatively according to the demands of users. The photocathode material will be Cs<sub>2</sub>Te. The room with the shielding will be completed in June, 2004, and we will moved the machine shortly. We hope to resume the operation of the linac in fall of 2004. The FEL is expected lasing in the next year.