FEL2012 - List of Authors (Schefer, S.)

Paper	Title	Page
WEPD54	Characterization of Single-cycle THz Pulses at the CTR Source at FLASH	500
	S. Wunderlich, S. Schefer, B. Schmidt, S. Schulz, S. Wesch DESY, Hamburg, Germany M.C. Hoffmann SLAC, Menlo Park, California, USA
	At the coherent transition radiation source at the free-electron laser in Hamburg (FLASH) at DESY, single-cycle THz pulses with electric field strengths exceeding one MV/cm are generated. We present the temporal and spatial characterization of this source with the technique of electro-optic sampling using a laser system synchronized with the accelerator to better than 100 fs. This method offers a quantitative detection of the electric field of the THz pulses in the time domain. Compared to other electron-accelerator driven sources like undulator radiation, the transition radiation source provides pulses with a high bandwidth and durations shorter than one picosecond. This enables time-resolving and non-destructive experiments with radiation in the THz regime including THz pump / THz probe experiments. Broadband and intense THz pulses are expected to be valuable tools for the study of dynamics of excitation of complex materials in transient electric and magnetic fields.

Paper

Title

Page

Characterization of Single-cycle THz Pulses at the CTR Source at FLASH

500

S. Wunderlich, S. Schefer, B. Schmidt, S. Schulz, S. Wesch
DESY, Hamburg, Germany
M.C. Hoffmann
SLAC, Menlo Park, California, USA

At the coherent transition radiation source at the free-electron laser in Hamburg (FLASH) at DESY, single-cycle THz pulses with electric field strengths exceeding one MV/cm are generated. We present the temporal and spatial characterization of this source with the technique of electro-optic sampling using a laser system synchronized with the accelerator to better than 100 fs. This method offers a quantitative detection of the electric field of the THz pulses in the time domain. Compared to other electron-accelerator driven sources like undulator radiation, the transition radiation source provides pulses with a high bandwidth and durations shorter than one picosecond. This enables time-resolving and non-destructive experiments with radiation in the THz regime including THz pump / THz probe experiments. Broadband and intense THz pulses are expected to be valuable tools for the study of dynamics of excitation of complex materials in transient electric and magnetic fields.