DC-coupled resistive silicon detectors for 4-D tracking

TL;DR

This paper introduces a novel DC-coupled resistive silicon detector design based on LGAD technology, demonstrating through simulation that it achieves excellent timing and spatial resolutions for 4-D tracking.

Contribution

The work presents a new DC-coupled resistive silicon detector concept that improves upon previous AC-coupled designs, with detailed simulation-based optimization.

Findings

Achieves timing resolution of a few tens of picoseconds.

Attains spatial resolution of a few microns.

Maintains key features of resistive silicon detectors through simulation.

Abstract

In this work, we introduce a new design concept: the DC-Coupled Resistive Silicon Detectors, based on the LGAD technology. This new approach intends to address a few known features of the first generation of AC-Coupled Resistive Silicon Detectors (RSD). Our simulation exploits a fast hybrid approach based on a combination of two packages, Weightfield2 and LTSpice. It demonstrates that the key features of the RSD design are maintained, yielding excellent timing and spatial resolutions: a few tens of ps and a few microns. In the presentation, we will outline the optimization methodology and the results of the simulation. We will present detailed studies on the effect of changing the ratio between the n+ layer resistivity and the low-resistivity ring and on the achievable temporal and spatial resolution.