CC BY 4.0 UnportedOsolodkov, MikhailFurch, Federico J.Schell, FelixŠušnjar, PeterCavalcante, FabioMenoni, Carmen S.Schulz, Claus P.Witting, TobiasVrakking, Marc J.J.2021-11-182021-11-182020https://oa.tib.eu/renate/handle/123456789/7335https://doi.org/10.34657/6382The development of attosecond pump-probe experiments at high repetition rate requires the development of novel attosecond sources maintaining a sufficient number of photons per pulse. We use 7 fs, 800 nm pulses from a non-collinear optical parametric chirped pulse amplification laser system to generate few-pulse attosecond pulse trains (APTs) with a flux of >106 photons per shot in the extreme ultraviolet at a repetition rate of 100 kHz. The pulse trains have been fully characterised by recording frequency-resolved optical gating for complete reconstruction of attosecond bursts (FROG-CRAB) traces with a velocity map imaging spectrometer. For the pulse retrieval from the FROG-CRAB trace a new ensemble retrieval algorithm has been employed that enables the reconstruction of the shape of the APTs in the presence of carrier envelope phase fluctuations of the few-cycle laser system. © 2020 The Author(s). Published by IOP Publishing Ltd.enghttps://creativecommons.org/licenses/by/4.0/530Attosecond pulse characterisationAttosecond pulse generationOptical parametric amplificationArticle