Simulation Study of the Design and Spatial Resolution of a Novel AC-coupled Cross Strip LGAD
Abstract
AC-coupled Low Gain Avalanche Diode (AC-LGAD), evolved from the standard LGAD technology, are silicon detectors characterized by exceptional temporal and spatial resolutions. This work proposes a novel sensor named AC-coupled Cross Strip LGAD (CS-LGAD) structure with dual-layered overlapping strip electrodes. It can achieve two-dimensional particle position measurement with low readout density while also inheriting the high temporal resolution of the LGAD. The sensor structure, doping and current-voltage (I-V) characteristics of the sensor were investigated through TCAD simulations. Additionally, Monte Carlo simulations were employed to simulate the signal response of CS-LGAD to minimum ionizing particles (MIPs). The response of MIPs hitting different positions was simulated, and the reconstruction of particle coordinates (x and y) was achieved based on the sharing of charges on the dual-layer electrodes. The spatial resolution might reach 3.6% and 5.5% of the pitch size in the x and y directions, respectively, according to the simulation. The proposed CS-LGAD is a promising 4D detector with low mass and low readout density.
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BibTeX
@misc{xu2026simulation,
title = {{Simulation Study of the Design and Spatial Resolution of a Novel AC-coupled Cross Strip LGAD}},
author = {Jingkang Xu and Mengzhao Li and Zhiliang Hu and Tianya Wu and Mei Zhao and Zhijun Liang and Lihua Mo and Tianjiao Liang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.06105},
eprint = {2609.06105},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.06105},
}
RIS
TY - UNPB
TI - Simulation Study of the Design and Spatial Resolution of a Novel AC-coupled Cross Strip LGAD
AU - Jingkang Xu
AU - Mengzhao Li
AU - Zhiliang Hu
AU - Tianya Wu
AU - Mei Zhao
AU - Zhijun Liang
AU - Lihua Mo
AU - Tianjiao Liang
PY - 2026
DA - 2026/09/05
PB - arXiv
DO - 10.48550/arxiv.2609.06105
UR - https://arxiv.org/abs/2609.06105
AB - AC-coupled Low Gain Avalanche Diode (AC-LGAD), evolved from the standard LGAD technology, are silicon detectors characterized by exceptional temporal and spatial resolutions. This work proposes a novel sensor named AC-coupled Cross Strip LGAD (CS-LGAD) structure with dual-layered overlapping strip electrodes. It can achieve two-dimensional particle position measurement with low readout density while also inheriting the high temporal resolution of the LGAD. The sensor structure, doping and current-voltage (I-V) characteristics of the sensor were investigated through TCAD simulations. Additionally, Monte Carlo simulations were employed to simulate the signal response of CS-LGAD to minimum ionizing particles (MIPs). The response of MIPs hitting different positions was simulated, and the reconstruction of particle coordinates (x and y) was achieved based on the sharing of charges on the dual-layer electrodes. The spatial resolution might reach 3.6% and 5.5% of the pitch size in the x and y directions, respectively, according to the simulation. The proposed CS-LGAD is a promising 4D detector with low mass and low readout density.
ER -