A new Low Gain Avalanche Diode concept: the double-LGAD

TL;DR

This paper introduces the double-LGAD, a novel detector concept that combines two LGADs to increase input charge without sacrificing timing resolution, using a single front-end electronics.

Contribution

The paper proposes and analyzes a new double-LGAD design that enhances charge collection while maintaining excellent timing performance.

Findings

Double-LGAD increases input charge compared to single LGADs.

The design maintains or improves timing resolution.

Study conducted on LGADs with different thicknesses.

Abstract

This paper describes the new concept of the double-LGAD. The goal is to increase the charge at the input of the electronics, keeping a time resolution equal or better than a standard (single) LGAD; this has been realized by adding the charges of two coupled LGADs while still using a single front-end electronics. The study here reported has been done starting from single LGAD with a thickness of 25 \textmu{m}, 35 \textmu{m} and 50 \textmu{m}.