THz Undulator Beamline @ BL3

The THz undulator beamline has been designed to provide coherent femtosecond (fs) – picosecond (ps) THz pulses for pump-and-probe experiments with the fs VUV pulses from FLASH. First light has been delivered into the FLASH experimental hall 'Albert Einstein' in November 2007. The THz pulses are generated by a purpose built undulator implemented in series to the VUV undulators. The design of the beamline allows to overlap a VUV pulse and a THz pulse generated by the same electron bunch at the end of BL3. The pulses should therefore be naturally synchronized. The expected pulse energies lie within the microjoule regime.

  THz radiation with the following parameters is available for pump-and-probe experiments at BL3:

  • tunable: 10 ‐ 230 μm; up to 100 μJ/pulse; ~10% bandwidth,
  • broadband at 200 μm; up to 10μJ/pulse; ~100% bandwidth
  • synchronized and phase stable to X-­ray pulses (down to 5 fs)
  • delivered to the experiment via vacuum beamline as:
  • (i) ultra-­‐high vacuum (~10­‐8 mbar), shorter delay between THz and X-­‐ray (~4 m path difference), can accommodate up to 0.3 m wide setup;
  • (ii) high vacuum (pressure ~10­‐6 mbar), longer delay between THz and X-­‐ray (~7 m path difference); can accommodate up to 2 m wide setup
CONTACT THz Beamline:
Stojanovic
Nikola Stojanovic
E-Mail: Nikola Stojanovic
Phone: +49 (0)40 8998 (9)4526
Location: 49 / 115
Pan
Rui Pan
E-Mail: Rui Pan
Phone: +49 (0)40 8998 6037
Location: 49 / 106
Temme
Marc Temme
E-Mail: Marc Temme
Phone: +49 (0)40 8998 2301
Location: 49 / 106
Golz
Torsten Golz
E-Mail: Torsten Golz
Phone: +49 (0)40 8998 6183
Location: 49 / 109

Zapolnova
Ekaterina Zapolnova
E-Mail: Ekaterina Zapolnova
Phone: +49 (0)40 8998 3652
Location: 49 / 109

Publications:

  • Tavella, F., Höppner, H., Tkachenko, V., Medvedev, N., Capotondi, F., Golz, T., Kai, Y., Manfredda, M., Pedersoli, E., Prandolini, M.J. and Stojanovic, N., 2017. Soft x-ray induced femtosecond solid-to-solid phase transition. High Energy Density Physics.
  • Finetti, Paola, et al. "Pulse duration of seeded free-electron lasers." Physical Review X 7.2 (2017).
  • Kovalev, S., Green, B., Golz, T., Maehrlein, S., Stojanovic, N., Fisher, A.S., Kampfrath, T. and Gensch, M., 2017. Probing ultra-fast processes with high dynamic range at 4th-generation light sources: Arrival time and intensity binning at unprecedented repetition rates. Structural Dynamics, 4(2), p.024301.
  • T. Oelze, B. Schütte, M. Müller, J.P. Müller, M. Wieland, U. Frühling, M. Drescher, A. Al-Shemmary, T. Golz, N. Stojanovic, and M. Krikunova, Correlated electronic decay in expanding clusters triggered by intense XUV pulses from a Free-Electron-Laser. Scientific Reports, 7 (2017)
  • B. Faatz et al., Simultaneous operation of two soft x-ray free-electron lasers driven by one linear accelerator, New Journal of Physics 18.6 (2016): 062002.
  • B. Green et al., High-Field High-Repetition-Rate Sources for the Coherent THz Control of Matter, Scientific reports 6 (2016).
  • S. Düsterer et al., Development of experimental techniques for the characterization of ultrashort photon pulses of extreme ultraviolet free-electron lasers, Physical Review Special Topics-Accelerators and Beams 17.12 (2014): 120702.
  • V. Asgekar, G. Geloni, V. Kocharyan, N. Stojanovic, P. Michel, and M. Gensch, Interference effects in super-radiant THz sources, Infrared physics & technology 64 (2014): 26-32.
  • N. Stojanovic, M. Drescher, Accelerator-and laser-based sources of high-field terahertz pulses, Journal of Physics B: Atomic, Molecular and Optical Physics 46(19), 192001 (2013).
  • R. Riedel et. al., Single-shot pulse duration monitor for extreme ultraviolet and X-ray free-electron lasers, Nature Comm. 4 (2013), 1731.
  • B. Schütte et. al., Evidence for Chirped Auger-Electron Emission, Phys. Rev. Lett. 108 (2012) 253003.
  • C. Kaya et. al., Phase sensitive monitoring of electron bunch form and arrival time in superconducting linear accelerators, App. Phys. Lett. 100 (2012), 1441103.
  • M. Först, M. Gensch, R. Riedel, F. Tavella, E.A. Schneidmiller, N. Stojanovic, M.V. Yurkov, Optical Afterburner for a SASE FEL: First Results from FLASH, THPC84, IPAC2011, San Sebastián, Spain, (2011).
  • F. Tavella, N. Stojanovic, G. Geloni, M. Gensch, Few Femtosecond Timing at Fourth Generation X-ray Light sources, Nat. Photon. 5 (2011), 162.
  • O. Grimm et al., Magnetic measurements with the FLASH infrared undulator, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 615.1 (2010): 105-113.
  • U. Fruehling, et. al., THz-field driven X-ray streak camera, Nat. Photon. 3 (2009), 523.
  • K. Tiedtke et al., The soft x-ray free-electron laser FLASH at DESY: beamlines, diagnostics and end-stations New journal of physics 11.2 (2009): 023029.
  • M. Gensch et. al., New infrared undulator beamline at FLASH, Infrared Phys. Technol. 51, 423-425, (2008).
  • B. Faatz et al., Development of a pump-probe facility combining a far-infrared source with laser-like characteristics and a VUV free electron laser, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 475.1 (2001): 363-367.