Amplified Emission of a Soft-X Ray Free-Electron Laser Based on Echo-Enabled Harmonic Generation

Enrico Allaria , Laura Badano , Giovanni de Ninno , Simone Di Mitri , Bruno Diviacco , William Fawley , Eugenio Ferrari , David Garzella (1) , Vanessa Grattoni , Erik Hemsing , Najmeh Mirian , Giuseppe Penco , Mihai Pop , Eduard Prat , Primoz Rebernik Ribič , Eléonore Roussel (2) , Simone Spampinati , Carlo Spezzani , Mauro Trovò , Dao Xiang

1 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
2 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

We report the first evidence of substantial gain in a soft-X ray Free Electron Laser (FEL) based on Echo-Enabled Harmonic Generation (EEHG). The experiment was focused on harmonics 36 (~7.3nm) and 45 (5.8 nm) and clearly demonstrated the expected EEHG capability of generating powerful and coherent FEL pulses, with strongly reduced sensitivity to electron-beam fluctuations. The experiment was carried out at FERMI, the seeded FEL user facility at Elettra-Sincrotrone Trieste.

Mots clés: FEL; laser; electron; experiment; free-electron-laser

Domaines: Physique des accélérateurs [physics.acc-ph]

Enrico Allaria, Laura Badano, Giovanni de Ninno, Simone Di Mitri, Bruno Diviacco, et al.. Amplified Emission of a Soft-X Ray Free-Electron Laser Based on Echo-Enabled Harmonic Generation. 10th International Particle Accelerator Conference, May 2019, Melbourne, Australia. pp.WEXXPLM1, ⟨10.18429/JACoW-IPAC2019-WEXXPLM1⟩. ⟨hal-02283598⟩