Ivo Vinklárek

Alexander von Humboldt Fellow & Postdoctoral researcher

Center for Free-Electron Laser Science (CFEL)
Deutsches Elektronen-Synchrotron DESY
Notkestrasse 85 (building 99a, room O3.005)
22607 Hamburg
Germany

Imaging chemical dynamics

ivo.vinklarek@cfel.de

+49-40-8998 6327

Research

Curriculum Vitae

since 10-2023	Alexander von Humboldt Fellow at the Center for Free Electron Laser Science, DESY, Hamburg
since 10-2022	Postdoctoral researcher at the Center for Free Electron Laser Science, DESY, Hamburg
2018–2022	PhD Student at J. Heyrovský Institute of Physical Chemistry, Academy of Science of the Czech Republic, Praha, Czech Republic; Thesis title: UV-IR Photochemistry in molecules and clusters investigated by velocity map imaging
2015–2017	Master in Chemical Physics at Charles University, Praha, Czech Republic

Publications

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Position in scientific management

03 January 2025

Timepix3: single-pixel multi-hit energy-measurement behaviour

13 November 2024

The event-driven hybrid-pixel detector readout chip, Timepix3, has the ability to simultaneously measure the time of an event on the nanosecond timescale and the energy deposited in the sensor. However, the behaviour of the system when two events are recorded in quick succession of each other on the same pixel was not studied in detail previously. We present experimental measurements, circuit simulations, and an empirical model for the impact of a preceding event on this energy measurements, which can result in a loss as high as 70%. Accounting for this effect enables more precise compensation, particularly for phenomena like timewalk. This results in significant improvements in time resolution — in the best case, multiple tens of nanoseconds — when two events happen in rapid succession.

Recent Publications