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Proceedings Paper

A new XUV-source for seeding a FEL at high repetition rates
Author(s): Arik Willner; Michael Schulz; Robert Riedel; Mark Yeung; Thomas Dzelzainis; Christos Kamperidis; Makis Bakarezos; Darryl Adams; Vladislav Yakovlev; Juliane Rönsch-Schulenburg; Brendan Dromey; Nektarios Papadogiannis; Michael Tatarakis; Stefan Düsterer; Siegfried Schreiber; Bart Faatz; Markus Drescher; Jörg Rossbach; Matthew Zepf; Franz Tavella
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Paper Abstract

Improved performance of Free Electron Laser (FEL) light sources in terms of timing stability, pulse shape and spectral properties of the amplified FEL pulses is of interest in many fields of science. A promising scheme is direct seeding with High-Harmonic Generation (HHG) in a noble gas target. A Free-Electron-Laser seeded by an external XUV-source is planned for FLASH II at DESY in Hamburg. The requirements for the XUV/soft X-ray source can be summarized as follows: A repetition rate of at least 100 kHz in a 10 Hz burst is needed at variable wavelengths from 10 to 40 nm and pulse energies of several nJ within single harmonics. This application requires a laser amplifier system with exceptional parameters, mJ-level pulse energy, sub-10 fs pulse duration at 100 kHz (1 MHz) burst repetition rate. A new OPCPA system is under development in order to meet these requirements, and very promising results has been achieved. In parallel to this development, a new High- Harmonic Generation concept is necessary to sustain the high average power of the driving laser system and for the need of high conversion efficiencies. Highest conversion efficiency in High Harmonic Generation has been shown using gas-filled capillary targets, up to now. For our application, only a free-jet target is applicable for high harmonic generation at high repetition rate, to overcome damage threshold limitations of HHG target optics. A new multi-jet target is under development and first tests show a good performance of this nozzle configuration.

Paper Details

Date Published: 11 May 2011
PDF: 9 pages
Proc. SPIE 8075, Harnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond II, 80750L (11 May 2011); doi: 10.1117/12.888969
Show Author Affiliations
Arik Willner, Deutsches Elektronen-Synchrotron (Germany)
Helmholtz-Institute Jena (Germany)
Michael Schulz, Deutsches Elektronen-Synchrotron (Germany)
Univ. of Hamburg (Germany)
Robert Riedel, Helmholtz-Institute Jena (Germany)
Univ. of Hamburg (Germany)
Mark Yeung, Queens Univ. (United Kingdom)
Thomas Dzelzainis, Queens Univ. (United Kingdom)
Christos Kamperidis, Technological Educational Institute of Crete (Greece)
Makis Bakarezos, Technological Educational Institute of Crete (Greece)
Darryl Adams, Queens Univ. (United Kingdom)
Vladislav Yakovlev, Max-Planck-Institute for Quantum Optics (Germany)
Juliane Rönsch-Schulenburg, Univ. of Hamburg (Germany)
Brendan Dromey, Queens Univ. (United Kingdom)
Nektarios Papadogiannis, Technological Educational Institute of Crete (Greece)
Michael Tatarakis, Technological Educational Institute of Crete (Greece)
Stefan Düsterer, Deutsches Elektronen-Synchrotron (Germany)
Siegfried Schreiber, Deutsches Elektronen-Synchrotron (Germany)
Bart Faatz, Deutsches Elektronen-Synchrotron (Germany)
Markus Drescher, Univ. of Hamburg (Germany)
Jörg Rossbach, Univ. of Hamburg (Germany)
Matthew Zepf, Queens Univ. (United Kingdom)
Franz Tavella, Helmholtz-Institute Jena (Germany)

Published in SPIE Proceedings Vol. 8075:
Harnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond II
Dino A. Jaroszynski, Editor(s)

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