A 2015 graduate of the Institut National des Sciences Appliquées in Rennes (INSA Rennes), Alexandre started his thesis at ISAE-SUPAERO in 2017 after spending some time at STMicroelectronics in Singapore. Vincent Goiffon, a professor at ISAE-SUPAERO, and Cédric Virmontois of the Centre National d’Etudes Spatiales (CNES) supervised his thesis, carried out with support from CNES and the French Alternative Energies and Atomic Energy Commission (CEA - Commissariat de l’Energie Atomique et aux Energies Alternatives).
His thesis work dealt with the study of the effects of nuclear and space radiations on CMOS image sensors, the goal being to improve space instruments and plasma diagnostics for nuclear fusion. More precisely, the study focused on the crystal defects induced by the radiation causing an increase in dark current. These studies contribute to improving our understanding of the physical principles at work in silicon affected by radiation.
Alexandre is the author or co-author of 11 publications. He has presented his work at the RADECS 2017, NSREC 2018, IISW 2019 and NSREC 2019 international conferences. He won various awards while he was working on this thesis. These include the international “Paul Phelps Award” grant from the NPSS chapter at IEEE (Institute of Electrical and Electronics Engineers) as well as the award for the best student article and best article at the RADECS 2019 conference. Alexandre also took part in opening the IEEE student branch at ISAE-SUPAERO in 2017 and presided over it until 2020.
Alexandre Le Roch defended his thesis in July 2020 and is currently working as a research engineer at ISAE-SUPAERO in collaboration with CNES. His research activities focus on the behavior of CMOS image sensors in contact with radiation for future missions that will explore the Jovian system (Jupiter), a very severe radiative environment. He will soon join the Goddard Space Flight Center (GSFC) at NASA to pursue this work on imaging systems’ behavior in contact with radiation. He sums up his thesis for you in 3 minutes flat
This thesis prize was presented by the ISAE-SUPAERO Foundation for the excellence of the research carried out and the outlook for the thesis’ applications.