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TY - CONF AU - Allaria, E. AU - Abrami, A. AU - Badano, L. AU - Bossi, M. AU - Braun, H.-H. AU - Bruchon, N. AU - Capotondi, F. AU - Castronovo, D. AU - Cautero, M. AU - Cinquegrana, P. AU - Coreno, M. AU - Couprie, M.-E. AU - Cudin, I. AU - Danailov, M.B. AU - De Ninno, G. AU - Demidovich, A.A. AU - Di Mitri, S. AU - Diviacco, B. AU - Fawley, W.M. AU - Feng, C. AU - Ferianis, M. AU - Ferrari, E. AU - Foglia, L. AU - Frassetto, F. AU - Gaio, G. AU - Garzella, D. AU - Ghaith, A. AU - Giacuzzo, F. AU - Giannessi, L. AU - Grattoni, V. AU - Grulja, S. AU - Hemsing, E. AU - Iazzourene, F. AU - Kurdi, G. AU - Lonza, M. AU - Mahne, N. AU - Malvestuto, M. AU - Manfredda, M. AU - Masciovecchio, C. AU - Miotti, P. AU - Mirian, N.S. AU - Nikolov, I. AU - Penco, G. AU - Penn, G. AU - Poletto, L.P. AU - Pop, M.A. AU - Prat, E. AU - Principi, E. AU - Raimondi, L. AU - Rebernik Ribič, P. AU - Reiche, S. AU - Roussel, E. AU - Sauro, R. AU - Scafuri, C. AU - Sigalotti, P. AU - Spampinati, S. AU - Spezzani, C. AU - Sturari, L. AU - Svandrlik, M. AU - Tanikawa, T. AU - Trovò, M. AU - Veronese, M. AU - Vivoda, D. AU - Xiang, D. AU - Zaccaria, M. AU - Zangrando, D. AU - Zangrando, M. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - First Lasing of a Free Electron Laser in the Soft X-Ray Spectral Range with Echo Enabled Harmonic Generation J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - We report on the successful operation of a Free Electron Laser (FEL) in the Echo Enabled Harmonic Generation (EEHG) scheme at the FERMI facility at Sincrotrone Trieste. The experiment required a modification of the FEL-2 undulator line which, in normal operation, uses two stages of high-gain harmonic generation separated by a delay line. In addition to a new seed laser, the dispersion in the delay-line was increased, the second stage modulator changed and a new manipulator installed in the delay-line chicane hosting additional diagnostic components. With this modified setup we have demonstrated the first evidence of strong exponential gain in a free electron laser operated in EEHG mode at wavelengths as short as 5 nm. PB - JACoW Publishing CP - Geneva, Switzerland SP - 7 EP - 10 KW - FEL KW - laser KW - electron KW - experiment KW - free-electron-laser DA - 2019/11 PY - 2019 SN - "" SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-MOA02 UR - http://jacow.org/fel2019/papers/moa02.pdf ER -