Resistive Silicon Detectors (RSD, also known as AC-LGAD) are innovative silicon sensors based on the LGAD technology, characterized by a continuous gain layer and by an internal signal-sharing mechanism.
RSDs are very promising tracking detectors that combine large pitch and extremely accurate position reconstruction: the most recent results show a spatial resolution of 2 μm for a sensor with 100 μm pixels. Such accuracy is achieved by combining the internal sharing mechanism of RSD with a reconstruction method based on a neural network.
This talk will present the first experimental results obtained from RSD arrays read out with a dedicated ASIC (FAST2), tailored to fast signals. The ASIC output is connected to a 16-ch digitizer, allowing simultaneously recording all the detector channels. All tested sensors are 3x3 or 4x4 arrays with different pitch sizes, coming from the RSD1, RSD2 productions manufactured at Fondazione Bruno Kessler (FBK, Italy).