Preprint

PUBDB-2021-01638

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Observation of Harmonic Lasing in the Angstrom Regime at European X-Ray Free Electron Laser

Schneidmiller, E. A. (Corresponding author)DESY* ; Brinker, F.DESY* ; Decking, W.DESY* ; Froehlich, L.DESY* ; Guetg, M.Extern*DESY* ; Noelle, D.DESY* ; Scholz, M.DESY* ; Yurkov, M.DESY* ; Zagorodnov, I.DESY* ; Geloni, G.XFEL.EU* ; Gerasimova, N.XFEL.EU* ; Gruenert, J.XFEL.EU* ; Laksman, J.XFEL.EU* ; Liu, J.XFEL.EU* ; Karabekyan, S.XFEL.EU* ; Kujala, N.XFEL.EU* ; Maltezopoulos, T.XFEL.EU* ; Petrov, I.XFEL.EU* ; Samoylova, L.XFEL.EU* ; Serkez, S.XFEL.EU* ; Sinn, H.XFEL.EU* ; Wolff-Fabris, F.XFEL.EU*

2021
American Physical Society College Park, MD

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Please use a persistent id in citations: doi:10.1103/PhysRevAccelBeams.24.030701  doi:10.3204/PUBDB-2021-01638

Report No.: 21-036; DESY-21-036; arXiv:2104.00384

Abstract: Harmonic lasing provides an opportunity to extend the photon energy range of existing and planned X-ray 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 (HLSS) that allows to improve the longitudinal coherence and spectral power of a Self-Amplified Spontaneous Emission (SASE) FEL. This concept was tested at FLASH in the range of 4.5 - 15 nm and at PAL 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 3rd and 5th harmonic lasing and, for the first time, operated a harmonic lasing cascade (5th-3rd-1st harmonics of the undulator). These results pave the way for reaching very high photon energies, up to 100 keV.

Keyword(s): Synchrotron Radiation and Free-Electron Lasers

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Contributing Institute(s):

1. Beschleunigerphysik (MPY)
2. The European XFEL Users (XFEL-User)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. 6G13 - Accelerator of European XFEL (POF4-6G13) (POF4-6G13)

Experiment(s):

1. Facility (machine) XFEL

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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