Abstract
| The High-Luminosity LHC (HL-LHC) with its large number of
collisions per bunch crossing will present a very challenging environment to the
particle detectors. To cope with these conditions, the current inner detector of
the ATLAS experiment will be replaced with a new all-silicon Inner Tracker (ITk)
during the Phase-II upgrade. Due to their superior radiation hardness, it has been
chosen to instrument the ITk innermost layer with 3D pixel sensors. In this article
the new pixel 3D sensor design and technology are reviewed, together with their
characterisation before and after exposition to large radiation dose, close to the one
expected for the innermost layer of ITk after 2000 fb
−1 of integrated luminosity
delivered by HL-LHC. |