Details

Autor(en) / Beteiligte

• Schneidmiller, E. A.
• Brinker, F.
• Decking, W.
• Froehlich, L.
• Guetg, M.
• Noelle, D.
• Scholz, M.
• Yurkov, M. V.
• Zagorodnov, I.
• Geloni, G.
• Gerasimova, N.
• Gruenert, J.
• Laksman, J.
• Liu, J.
• Karabekyan, S.
• Kujala, N.
• Maltezopoulos, Th
• Petrov, I.
• Samoylova, L.
• Serkez, S.
• Sinn, H.
• Wolff-Fabris, F.

Titel

Observation of harmonic lasing in the Angstrom regime at European X-ray Free Electron Laser

Ist Teil von

• Physical review. Accelerators and beams, 2021-03, Vol.24 (3), p.030701, Article 030701

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Harmonic lasing provides an opportunity to extend the photon energy range of existing and planned x-ray free electron laser (FEL) user facilities. Contrary to nonlinear harmonic generation, harmonic lasing can generate a much more intense, stable, and narrow-band FEL beam. Another interesting application is harmonic lasing self-seeding that allows to improve the longitudinal coherence and spectral power of a self-amplified spontaneous emission FEL. This concept was tested at the soft x-ray FEL user facility FLASH in the range of 4.5–15 nm and at Pohang accelerator laboratory X-ray Free Electron Laser (XFEL) at 1 nm. In this paper we present recent results from the European XFEL where we successfully demonstrated harmonic lasing at 5.9 Angstrom and 2.8 Angstrom. In the latter case we obtained both third and fifth harmonic lasing and, for the first time, operated a harmonic lasing cascade (fifth-third-first harmonics of the undulator). These results pave the way for reaching very high photon energies, up to 100 keV.