In recent years, the gain suppression mechanism has been studied for large localized charge deposits in Low-Gain Avalanche Detectors (LGADs). LGADs are a thin silicon detector with a highly doped gain layer that provides moderate internal signal amplification. Using the CENPA Tandem accelerator at the University of Washington, the response of LGADs with different thicknesses to MeV-range energy deposits from a proton beam were studied. Three LGAD prototypes of 50~μm, 100~μm, 150~μm were characterized. The devices' gain was determined as a function of bias voltage, incidence beam angle, and proton energy. This study was conducted in the scope of the PIONEER experiment, an experiment proposed at the Paul Scherrer Institute to perform high-precision measurements of rare pion decays. LGADs are considered for the active target (ATAR) and energy linearity is an important property for particle ID capabilities.
@article{arxiv.2502.02244,
title = {Measured gain suppression in FBK LGADs with different active thicknesses},
author = {J. Yang and S. Braun and Q. Buat and J. Ding and M. Harrison and P. Kammel and S. M. Mazza and F. McKinney-Martinez and A. Molnar and J. Ott and A. Seiden and B. Schumm and Y. Zhao and Y. Zhang and V. Tishchenko and A. Bisht and M. Centis-Vignali and G. Paternoster and M. Boscardin},
journal= {arXiv preprint arXiv:2502.02244},
year = {2025}
}
Comments
arXiv admin note: substantial text overlap with arXiv:2405.02550