R. Kato et al., Lasing at 150 mu m wavelength and measurement of the characteristics of the free-electron laser at ISIR, Osaka University, NUCL INST A, 445(1-3), 2000, pp. 169-172
We are conducting FEL experiments using the infrared FEL system based on th
e L-band electron linac at ISIR, Osaka University, to extend the wavelength
region toward the longer-wavelength side and to study FEL dynamics in the
long wavelength region. The FEL wavelength was extended to 150 mu m, which
is the longest wavelength so far obtained with FELs based on RF linacs. We
observed a phenomenon that FEL oscillation was obtained at two different op
tical cavity lengths but not in between them. (C) 2000 Elsevier Science B.V
. All rights reserved.