Spectral studies of ultrashort and coherent radiation pulses at the DELTA storage ring

Khan, S., Bahnsen, F. H., Bolsinger, M., Götz, F., Hilbrich, S., Jebramcik, M., Lockmann, N. M., Mai, C., Auf Der Heide, A. Meyer, Shayeganrad, G., Ungelenk, P. and Zimmermann, D. (2016) Spectral studies of ultrashort and coherent radiation pulses at the DELTA storage ring. In IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference. Joint Accelerator Conferences Website. pp. 2851-2854 .

Abstract

At the 1.5-GeV synchrotron light source DELTA operated by the TU Dortmund University, ultrashort and coherent radiation pulses in the VUV and THz regime are routinely generated by the interaction of electron bunches with femtosecond laser pulses. A laser-induced energy modulation is converted into a density modulation (microbunching) by a magnetic chicane, giving rise to coherent emission at harmonics of the initial laser pulses (coherent harmonic generation, CHG). As a first step towards active control of the shape and spectrum of CHG pulses, spectral studies were performed under variation of the chicane strength and the laser properties. The spectral phase of the laser pulses was controlled by tuning the laser compressor and monitored using FROG. A new autocorrelation method yields additional information on the pulse shape.

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Contributors

Author: G. Shayeganrad

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