Joël Lemaire, PhD in Physical Chemistry, senior researcher at the Centre National de la Recherche Scientifique (CNRS), works at the Institut de Chimie Physique in Orsay (ICP, CNRS, Université Paris Saclay). His main research topics are ion spectroscopy and reactivity, structural characterization of ions by IRMPD (InfraRed Multiple Photon Dissociation) spectroscopy, and real-time detection of trace compounds in air or water. A large part of his work involves instrument development, in particular original Fourier Transform Ion cyclotron Resonance mass spectrometers (FT-ICR-MS) using permanent magnets.