Short wavelength FEL research at Institute of Free Electron Laser in Osaka University

(TU-3-08)

M. Asakawa, S.Nakai, K.Imasaki* , N.Ohigashi**, Y.Tunawaki***, A.Mhori*.  

Institute of Free Electron Laser, Osaka University, *Institute for Laser Technology, **Kansai University , ***Osaka Industrial University

Institute of Free Electron Laser (IFEL) had been established by the Key Technology Center project in Japan. Now it is operated at Osaka University after the end of the project. The FEL with wide tunable wave range from 0.27 to more than 50$\mu$m installed has being used for applications of various fields at this institute.

Beside the application of FEL as a users facility, an effort to extend the wavelength toward shorter wave length region has being performed. SASE FEL with micro-wiggler and seed X-ray is proposed and preliminary investigation is under way. The basic development of micro-wiggler is almost finished. For seed X-ray, we will use Laser-produced Plasma X-ray. The 3D computer simulation results shows the feasibility of SASE in the range of up to 0.01$\mu$m with IFEL accelerator. The electron beam more than 200A is required to get a sufficient gain. A photocathode of several kinds are designed and simulated by a computer code. This article describes the status and investigation of this FEL update.