A High-Granularity Timing Detector (HGTD), based on Low-Gain Avalanche Detector (LGAD) technology, is proposed for the ATLAS Phase-II upgrade.
In this contribution, we present new developments in the production of LGAD by NDL (Novel Device Laboratory, Beijing) and IHEP. NDL has delivered three batches of LGAD prototype sensors at the beginning of 2019. These sensors are fabricated with 30um...
We report on the results of a radiation campaign with neutrons, protons and gammas of Low-Gain Avalanche Detectors (LGAD) produced by HPK as prototypes for the HGTD in ATLAS. With a common mask, sensors with an active thickness of 50 µm (2 splits) and 35 µm (3 splits) were produced. The different splits refer to different combinations of the doping profile of the gain layer and the resistivity...
Low-Gain Avalanche Detectors (LGAD) have gained high consideration in the past years thanks to proprieties such as time resolution below 30 ps. The first large-scale use of LGADs will be in the High-Luminosity LHC upgrades of CMS and ATLAS. LGAD are thin silicon sensors with internal gain supplied by a thin layer of highly concentrated Boron close to the junction. During neutron and proton...
Beside LGADs are now considered a promising solution for 4D-tracking thanks to the excellent timing resolution, in some HEP applications the latter should come with a state-of-the-art spatial resolution of the segmented sensors. The currently available LGAD technology typically features large pixels, in the range 500 µm – 1 mm, due to the presence of a gain-loss region between adjacent pixels,...
