UV-FIR FEL facilities and application research at the FELI

Abstract

Four FEL facilities FEL-1, FEL-2, FEL-3 and FEL-4 achieved lasing at the FELI in Oct. 1994, in Feb. 1995, in Dec. 1995 and in Oct. 1996, respectively. They are open for users to supply several MW-level FELs covering the wavelength range of 0.3–40 μ m. The present maximum average power of the IR-FEL is about 1 W. Total operation time in 1996 was about 2400 hours. The visible- and UV-facility FEL-3 has broken the world record for the shortest wavelength oscillation of linac-based FELs with a thermionic gun up to 0.278 μm. The FIR facility FEL-4 (20–80 μm) was installed at the 33-MeV beam line, downstream of FEL-1. The FEL beams are delivered from the optical cavities to the diagnostics room and four user’s rooms (eighteen stations) through the pipe lines. The beam can be shared by using fan-shaped mirrors to several stations including two manipulators simultaneously for isotope separation, bio-medical and semiconductor applications.