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Conference Paper

The New IR FEL Facility at the Fritz-Haber-Institut in Berlin

MPS-Authors
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Schöllkopf,  Wieland
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Gewinner,  Sandy
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Erlebach,  Wolfgang
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Heyne,  Georg
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Junkes,  Heinz
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Liedke,  Andreas
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Meijer,  Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Paarmann,  Alexander
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Helden,  Gert von
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Schöllkopf, W., Gewinner, S., Erlebach, W., Heyne, G., Junkes, H., Liedke, A., et al. (2015). The New IR FEL Facility at the Fritz-Haber-Institut in Berlin. In J. Chrin, S. Reiche, & V. R. W. Schaa (Eds.), Proceedings of the 36th Free Elecron Laser Conference (pp. 629-634). Retrieved from http://www.jacow.org/index.php?n=Main.Proceedings.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-62E3-8
Abstract
A mid-infrared oscillator FEL has been commissioned at the Fritz-Haber-Institut. The accelerator consists of a thermionic gridded gun, a subharmonic buncher and two S-band standing-wave copper structures [1,2]. It provides a final electron energy adjustable from 15 to 50 MeV, low longitudinal (<50 keV-ps) and transverse emittance (<20 π mm-mrad), at more than 200 pC bunch charge with a micro-pulse repetition rate of 1 GHz and a macro-pulse length of up to 15 μs. Regular user operation started in Nov. 2013 with 6 user stations. Pulsed radiation with up to 100 mJ macro-pulse energy at about 0.5% FWHM bandwidth is routinely produced in the wavelength range from 4 to 48 μm. We will describe the FEL design and its performance as determined by IR power, bandwidth, and micro-pulse length measurements. Further, an overview of the new FHI FEL facility and first user results will be given. The latter include, for instance, spectroscopy of bio-molecules (peptides and small proteins) conformer selected or embedded in superfluid helium nano-droplets at 0.4 K, as well as vibrational spectroscopy of mass-selected metal-oxide clusters and protonated water clusters in the gas phase.