Speaker
Description
The objective of the work presented in this talk is the development of new position sensitive detectors with low signal amplification useful also for timing applications and called Low Gain Avalanche Detector (LGAD). These new devices are based on the standard Avalanche Photo Diodes (APD) normally used for optical and X-ray detection applications.
We will present the last experimental results on 50um thin LGAD fabricated for the High Granularity Time Detector of the ATLAS experiment. We have performed a beam test at CERN with LGAD of different gain and report the measured timing resolution, comparing it with laser injection and simulations. For the 50 μm LGAD, the timing resolution measured is 30 ps.
In order to optimize the electrical characteristics of thin LGAD we performed two dimensional numerical simulations based on Sentaurus and Silvaco simulation tools and the technological steps needed for the fabrication.
In this talk we will discuss also the radiation hardness of LGAD and the methods implemented to withstand the high fluences expected in the HGTD.
