Feb 21 – 25, 2022
Vienna University of Technology
Europe/Vienna timezone

Response of the MIMOSA-28 pixel sensor to a wide range of ion species and energies

Not scheduled
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Recorded Presentation Electronics


Dr Claire-Anne Reidel (GSI Helmholtzzentrum für Schwerionenforschung GmbH)


CMOS pixel sensors, originally developed for High Energy Physics experiments, are also used for space radiation research and medical applications, providing high resolution particle trajectories, for e.g., cross section measurements. In the present work, the response of the CMOS pixel sensor MIMOSA-28 was investigated for a variety of ion beams and energies. Several experiments were performed at different particle accelerators to study the number of pixels triggered by an incoming particle as a function of the energy loss in the range 10-14000 keV. Measurements were performed for ion beams relevant for clinical applications such as protons and carbon ions, but also for heavier particles like iron ions relevant for space radiation research in the energy range 10 MeV/u - 1 GeV/u. In addition, the spatial energy loss distributions of several ion beams were computed with Monte Carlo simulations and a semi-empirical model, based on thermal diffusion and Coulomb expansion, was developed to reproduce the sensor response as a function of the energy loss. Furthermore, sensors were exposed to mixed radiation fields showed their capability as a suitable, additional tool to improve particle identification in conjunction with other detector systems. To enhance their particle identification capability further, new designs embed the digitization of the energy loss directly in pixels. Small prototypes have been designed by the TIIMM joint research activity and sent to fabrication recently.

Primary author

Dr Claire-Anne Reidel (GSI Helmholtzzentrum für Schwerionenforschung GmbH)


Dr Christoph Schuy (GSI Helmholtzzentrum für Schwerionenforschung GmbH) Dr Christian Finck (Université de Strasbourg, CNRS) Dr Felix Horst (GSI Helmholtzzentrum für Schwerionenforschung GmbH) Dr Daria Boscolo (GSI Helmholtzzentrum für Schwerionenforschung GmbH) Prof. Jérôme Baudot (Université de Strasbourg, CNRS) Dr Thomas Friedrich (GSI Helmholtzzentrum für Schwerionenforschung GmbH) Dr Marie Vanstalle (Université de Strasbourg, CNRS) Prof. Marco Durante (GSI Helmholtzzentrum für Schwerionenforschung GmbH) Dr Eleuterio Spiriti (INFN, Laboratori Nazionali di Frascati) Luca Federici (INFN, Laboratori Nazionali di Frascati) Weiping Ren (Université de Strasbourg, CNRS) Maciej Kachel (Université de Strasbourg, CNRS) Christine Hu-Guo (Université de Strasbourg, CNRS) Rachid Sefri (Université de Strasbourg, CNRS) Yue Zhao (Université de Strasbourg, CNRS) Dr Uli Weber (GSI Helmholtzzentrum für Schwerionenforschung GmbH)

Presentation materials