Rostock 2019 – scientific programme
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A: Fachverband Atomphysik
A 15: Attosecond physics
A 15.6: Talk
Wednesday, March 13, 2019, 12:00–12:15, S HS 3 Physik
Isolated attosecond pulse generation at 100 kHz repetition rate — •Tobias Witting1, Federico Furch1, Mikhail Osolodkov1, Felix Schell1, Peter Susnjar1, Carmen Menoni2, Claus-Peter Schulz1, and Marc JJ. Vrakking1 — 1Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin — 2Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, USA
We aim to perform attosecond pump-probe experiments with coincidence detection of photoelectrons and -ions in a reaction microscope. To increase the data-rates we have developed a non-collinear optical parametric chirped pulse amplification (NOPCPA) laser system providing 7 fs, 190 µJ laser pulses at 100 kHz repetition rate [1]. We achieved further compression to 3.2 fs near single-cycle pulses and demonstrate their use for attosecond pulse generation by high harmonic generation up to 55 eV at 100 kHz. Our source provides an XUV flux of 1013 photons/sec. We present our progress towards a complete attosecond pump-probe beamline coupled to a reaction microscope. By means of velocity map imaging we characterised the attoseocond pulse trains produced by the 7 fs pulses from the NOPCPA system with the RABBITT technique. The isolated attosecond pulses produced by the post compressed near single-cycle pulses have been characterised with attosecond streaking.
[1] F.J. Furch, T. Witting, A. Giree, C. Luan, F. Schell, G. Arisholm, C.P. Schulz, and M.J.J. Vrakking. Optics Letters 42, no. 13 (2017)