FEL FACILITIES AND APPLICATION RESEARCHES AT THE FELI

Four FEL facilities (FEL-1, FEL-2, FEL-3 and FEL-4) achieved lasing at FELI in October 1994, in February 1995, in December 1995 and in Octob er 1996, respectively. They are open for users and can supply several MW-level FELs covering the wavelength range of 0.3-40 mu m. Total oper ation time in 1996 was about 2400 h. 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 mu m. The FEL be ams are delivered from the optical cavities to the diagnostic room and four users rooms (18 stations) through the pipe lines. The beam can b e shared by using fan-shaped Au-coated mirrors to several stations inc luding two manipulators simultaneously for isotope separation, bio-med ical and semiconductor applications. (C) 1998 Elsevier Science B.V. Al l rights reserved.