TY - INPR A1 - Ševaev, Dmitrij A1 - Nomerotski, Andrei A1 - Švihra, Peter A1 - Sishodia, Keshav A1 - Roos, Andreas Hult A1 - Albrecht, Martin A1 - Andreasson, Jakob A1 - Krikunova, Maria A1 - Klimešová, Eva T1 - Studies of ultrafast dynamics in substrate-free nanoparticles at ELI using Timepix3 optical camera T2 - arXiv.org N2 - We present a novel application of the Timepix3 optical camera (Tpx3Cam) for investigating ultrafast dynamics in substrate-free nanoparticles at the Extreme Light Infrastructure European Research Infrastructure Consortium (ELI ERIC). The camera, integrated into an ion imaging system based on a micro-channel plate (MCP) and a fast P47 scintillator, enables individual time-stamping of incoming ions with nanosecond timing precision and high spatial resolution. The detector successfully captured laser-induced ion events originating from free nanoparticles disintegrated by intense laser pulses. Owing to the broad size distribution of the nanoparticles (10-500 nm) and the variation in laser intensities within the interaction volume, the detected events range in occupancy from near-zero to extremely high, approaching the readout limits of the detector. By combining time-of-flight and velocity map imaging (VMI) techniques, detailed post-processing and analysis were performed. The results presented here focus on the performance of Tpx3Cam under high-occupancy conditions, which are of particular relevance to this study. These conditions approach the limitations imposed by the camera readout capabilities and challenge the effectiveness of standard post-processing algorithms. We investigated these limitations and associated trade-offs, and we present improved methods and algorithms designed to extract the most informative features from the data. KW - VMI KW - Timepix3 KW - Tpx3Cam Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-20875 ER -