The ATLAS experiment at the LHC will replace its current inner tracker system for the HL-LHC era. 3D silicon pixel sensors are being considered as radiation-hard candidates for the innermost layers of the new fully silicon-based tracking detector. 3D sensors with a small pixel size of 50×50μm2 and 25×100μm2 compatible with the first prototype ASIC for the HL-LHC, the RD53A chip, have been studied in beam tests after uniform irradiation to 5×1015neq/cm2. An operation voltage of only 50 V is needed to achieve a 97% hit efficiency after this fluence.
@article{arxiv.1903.04838,
title = {Performance of Irradiated RD53A 3D Pixel Sensors},
author = {S. Terzo and M. Chmeissani and G. Giannini and S. Grinstein and M. Manna and G. Pellegrini and D. Quirion and D. Vazquez Furelos},
journal= {arXiv preprint arXiv:1903.04838},
year = {2019}
}