Optical afterburner for an X-ray FEL as a tool for ... - European XFEL
Optical afterburner for an X-ray FEL as a tool for ... - European XFEL
Optical afterburner for an X-ray FEL as a tool for ... - European XFEL
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FXE Workshop, Budapest, 9 Dec. 2009<br />
E.L. Saldin, E.A. Schneidmiller, M.V. Yurkov<br />
Proof-of-principle experiment at FLASH (2009)<br />
• ORFIR collaboration (M. Gensch et al.) combined two independent<br />
projects: <strong>Optical</strong> Replica Synthesizer (ORS) <strong>an</strong>d Far-Infrared Undulator<br />
• <strong>Optical</strong> Replica Synthesizer (Saldin et al.) is a device <strong>for</strong> diagnostics of<br />
ultra-short electron bunches. It w<strong>as</strong> successfully comissioned this year<br />
(V. Ziem<strong>an</strong>n et al.). It consists of a l<strong>as</strong>er, two undulators, <strong>an</strong>d a<br />
dispersion section (plus diagnostics). During the experiment the second<br />
undulator w<strong>as</strong> off.<br />
• Far-Infrared Undulator w<strong>as</strong> tuned to l<strong>as</strong>er wavelength, 770 nm<br />
• Strong coherent radiation from FIR undulator w<strong>as</strong> detected: 1 µJ within a<br />
narrow b<strong>an</strong>d<br />
• SASE <strong>FEL</strong> operation w<strong>as</strong> not disturbed<br />
FLASH e-logbook, 20.03.09:<br />
Summary from <strong>FEL</strong> users: we saw 1 micro Joule of 770 nm radiation in the THz beamline!<br />
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