PoS(ICHEP2020)591 Measurement of Cosmic Deuteron Flux with the AMS-02 Detector F Dimiccoli, ,∗ R Battiston,  I Lazzizzera,  F Nozzoli  and P Zuccon ,  INFN, Trento Institute for Fundamental Physics and Applications, I-38123, Trento, Italy  Physics, Università degli Studi di Trento, I-38123 Trento, Italy E-mail: francesco.dimiccoli@unitn.it The deuteron flux in cosmic rays is one of the most valuable tools for understanding the propagation of CR in the galaxy and constrain the models that describe it. In this work, a preliminary measurement of D flux is presented, obtained from the data of the AMS-02 experiment, considering a data-taking period of 7 years (2011-2018). 40th International Conference on High Energy physics - ICHEP2020 July 28 - August 6, 2020 Prague, Czech Republic (virtual meeting) ∗ Speaker © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). https://pos.sissa.it/