| Paper | Title | Page |
|---|---|---|
| MOAAU03 | First Lasing of the Elettra Storage-Ring Free-Electron Laser in Seeded Configuration | |
|
||
| We report the first lasing of the Elettra storage-ring free-electron laser operated in “single-pass” seeded configuration. The external seed was provided by a Ti:Sa laser tuned at 780 and 390 nm, with adjustable repetition rate (10 Hz – 1kHz) and pulse duration (100 fs or 1 ps). We have obtained intense coherent radiation in the spectral range between 130 and 260 nm. Harmonic pulses are characterized by high peak power (orders of magnitudes above spontaneous radiation) and very good stability (fluctuations of few percent). The signal is transform limited. The Elettra optical klystron is made of independent APPLE-type undulators. This allows complete freedom in the choice of light polarization. Presently, all the above features make the Elettra free-electron laser in seeded configuration a unique light source, which is attractive for several user experiments. |