Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 85: Beschleunigerphysik 7

T 85.1: Vortrag

Donnerstag, 1. März 2012, 16:45–17:00, VG 1.103

Characterization of single-cycle THz pulses at the coherent transition radiation source at FLASH — •Steffen Wunderlich¹, Matthias C. Hoffmann², Sebastian Schulz¹, Stephan Wesch¹, Laurens Wißmann¹, and Bernhard Schmidt¹ — ¹Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — ²SLAC National Accelerator Laboratory, Menlo Park, CA, USA

At the coherent transition radiation source at the free-electron laser in Hamburg (FLASH), single-cycle THz pulses with electric field strengths exceeding one MV/cm and pulse energies of 100 μJ are generated. Compared to other electron-accelerator driven sources like undulator radiation, coherent transition radiation provides pulses with a high bandwidth and durations shorter than one picosecond. The technique of electro-optic sampling offers a quantitative detection of the electric field of the THz pulses in the time domain. This source enables time-resolving and non-destructive experiments with radiation in the THz regime including THz pump / THz probe experiments. Due to photon energies far below of the exciting energy of interband transitions, THz radiation is suitable for the study of e.g. impurities or charge carriers in semiconductors.