Experience in Operating sFLASH with High-Gain Harmonic Generation

Bödewadty, J.; Aßmann, R.; Ekanayakez, N.; Faatz, B.; Hartl, I.; Kazemi, M.M.; Laarmann, T.; Lechner, C.; Przystawik, A.; Amstutz, Ph.; Azima, A.; Drescher, M.; Hillert, W.; Lazzarino, L.L.; Maltezopoulosx, Th.; Miltchev, V.; Plath, T.; Roßbach, J.; Hacker, K.; Khan, S.; Lockmann, N.; Molo, R.

2017

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Abstract

sFLASH, the experimental setup for external seeding of free-electron lasers (FEL) at FLASH, has been operated since 2015 in the high-gain harmonic generation (HGHG) mode. A detailed characterization of the laser-induced energy modulation, as well as the temporal characterization of the seeded FEL pulses is possible by using a transversedeflecting structure and an electron spectrometer. FEL saturation was reached for the 7th harmonic of the 267 nm seed laser. In this contribution, we present the latest experimental results.