First experimental results of the spatial resolution of RSD pad arrays read out with a 16-ch board

Abstract

Resistive Silicon Detectors (RSD, also known as AC-LGAD) are innovative silicon sensors, based on the LGAD technology, characterized by a continuous gain layer that spreads across the whole sensor active area. RSDs are very promising tracking detectors, thanks to the combination of the built-in signal sharing with the internal charge multiplication, which allows large signals to be seen over multiple read-out channels. This work presents the first experimental results obtained from a 3$\times$4 array with 200~\mum~pitch, coming from the RSD2 production manufactured by FBK, read out with a 16-ch digitizer. A machine learning model has been trained, with experimental data taken with a precise TCT laser setup, and then used to predict the laser shot positions, finding a spatial resolution of $\sim$~5.5~\mum.

References in corpus (4)

• Resistive AC-Coupled Silicon Detectors: principles of operation and first results from a combined analysis of beam test and laser data
• First demonstration of 200, 100, and 50 um pitch Resistive AC-Coupled Silicon Detectors (RSD) with 100% fill-factor for 4D particle tracking
• First application of machine learning algorithms to the position reconstruction in Resistive Silicon Detectors
• The second production of RSD (AC-LGAD) at FBK