T. Haga et al., FEL OSCILLATION IN IR REGION USING A 2-MODE COMPACT LINAC, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 393(1-3), 1997, pp. 193-196
Free-electron-laser of (FEL) oscillation at 14 mu m using a two-mode c
ompact linac is reported. FEL oscillation with a net gain of 7% is obt
ained using an electron beam with an energy of 24.8 MeV, peak current
of 30 A, and pulse duration of 10 mu s. Since an electron beam with go
od properties such as a low emittance and narrow energy spread is esse
ntial for the FEL oscillation, a low-emittance gun supplied with a hig
h voltage of DC -200 kV and a klystron modulator having a precise volt
age stability were developed. The linac can not only be operated as a
FEL source but also an injector for a synchrotron radiation ring. This
is the first such linac reported and is expected to enable cost-effec
tive industrial use of FEL.