新型交流耦合交叉条带LGAD的设计与空间分辨率的模拟研究
Simulation Study of the Design and Spatial Resolution of a Novel AC-coupled Cross Strip LGAD
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- School of Information Engineering, Nanchang University（南昌大学信息工程学院）
- Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）
- Spallation Neutron Source Science Center（散裂中子源科学中心）
机构由 AI 辅助整理，请以论文原文为准。
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中文总结 AI 辅助
本文提出一种新型交流耦合交叉条带LGAD（CS-LGAD）探测器，通过双层重叠电极实现低读出密度的二维位置测量，模拟显示其空间分辨率在x和y方向分别达节距的3.6%和5.5%，是性能优异的4D探测器。
中文摘要 AI 辅助
交流耦合低增益雪崩二极管（AC-LGAD）由标准LGAD技术发展而来，是一种具有优异时间和空间分辨率的硅探测器。本工作提出了一种名为交流耦合交叉条带LGAD（CS-LGAD）的新型传感器结构，其具有双层重叠条带电极。该结构能够以低读出密度实现二维粒子位置测量，同时继承LGAD的高时间分辨率。通过TCAD模拟研究了传感器的结构、掺杂及电流-电压（I-V）特性。此外，采用蒙特卡罗模拟研究了CS-LGAD对最小电离粒子（MIPs）的信号响应。模拟了MIPs击中不同位置时的响应，并基于双层电极上的电荷共享实现了粒子坐标（x和y）的重建。根据模拟结果，空间分辨率在x和y方向分别可达到节距尺寸的3.6%和5.5%。所提出的CS-LGAD是一种具有低质量和低读出密度的有前景的4D探测器。
英文摘要
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.
