Future high-energy physics experiments require a paradigm shift in radiation detector design. In response to this challenge, resistive LGADs that combine Low Gain Avalanche Diode technology with resistive readout have been developed. The prototypes created so far, employing AC-coupled contacts, have demonstrated impressive performance, achieving a temporal resolution of 38 ps and a spatial resolution of 15 μm with a pixel pitch of 450 μm. To tackle some of the issues encountered up to this point, particularly the non-uniform response across the entire surface of the detector, a new version with DC-coupled contacts has recently been developed. The Synopsys Sentaurus TCAD simulations that have guided the design of their first production, released by the Fondazione Bruno Kessler in November 2024, will be presented below along with a concise summary of the history of the prototypes with AC-coupled contacts.
@article{arxiv.2505.05642,
title = {Design and optimisation of radiation resistant AC- and DC-coupled resistive LGADs},
author = {Alessandro Fondacci and Tommaso Croci and Daniele Passeri and Roberta Arcidiacono and Nicolò Cartiglia and Maurizio Boscardin and Matteo Centis Vignali and Giovanni Paternoster and Omar Hammad Ali and Leonardo Lanteri and Luca Menzio and Federico Siviero and Marco Ferrero and Valentina Sola and Arianna Morozzi and Francesco Moscatelli},
journal= {arXiv preprint arXiv:2505.05642},
year = {2025}
}