阻性阳极PICOSEC Micromegas探测器的设计、仿真与性能分析
仪器与探测器
2025-12-23 v1
摘要
PICOSEC Micromegas探测器是一种为实现带电粒子探测的十皮秒级计时分辨率而开发的微型图案气体探测器概念，采用将碰米石辐射体与两级Micromegas放大结构相结合的方式实现。为提高操作稳健性，采用在Kapton基板上沉积的DLC层实现阻性阳极。虽然该设计增强了探测器的稳定性，但阻性层可能影响探测器的速率性能、信号形成以及探测器电容，从而改变计时性能。本文 presents 对阻性设计的全面研究，包括解析模型和有限元仿真，以量化因阻性层上的欧姆电压降导致的速率相关增益降低。推导出阻性层上电压的解析解，开发数值模型以评估在强粒子通量下的增益抑制。利用时变加权场和Garfield++仿真框架研究阻性层对信号形成的影响。量化了由阻性层诱导的信号分量的贡献，发现当表面电阻率超过100 kohm每平方时，信号前沿得以保持。设计、制造并实验表征了单通道阻性阳极原型器。实验室测量使用单光子和功率谱密度分析显示，信号幅度的预测性降低同时保持了前沿。μonic束测试显示，采用CsI和DLC光阑极时，时间分辨率分别为11.5皮秒和11.9皮秒，表明阻性设计适用于精密计时应用。
引用
@article{arxiv.2512.19120,
title = {Design, simulation and performance of the resistive-anode PICOSEC Micromegas detector},
author = {Djunes Janssens and Antonija Utrobicic and Marinko Kovacic and Marta Lisowska and Eraldo Oliveri and Florian Brunbauer and Karl Floethner and Hans Muller and Rui De Oliveira and Giorgio Orlandini and Leszek Ropelewski and Lucian Scharenberg and Thomas Schneider and Miranda van Stenis and Rob Veenhof and Thomas Papaevangelou and Roy Aleksan and Stephane Aune and Thomas Gustavsson and Alexandra Kallitsopoulou and Philippe Legou and Michal Pomorski and Emmanuel Scorsone and Lukas Sohl and Mariam Kebbiri and Spyros Tzamarias and Dimos Sampsonidis and Yannis Angelis and Ioannis Maniatis and Ioannis Karakoulias and Jonathan Bortfeldt and Ilaria Vai and Matteo Brunoldi and Davide Fiorina and Paolo Vitulo and Jaydeep Datta and Nathan Shankman and Kondo Gnanvo and Klaus Dehmelt and Brian Kross and Jack McKisson and Akash Pandey and George Fanourakis and Michele Gallinaro and Francisco Garcia and Yi Zhou and Jianbei Liu and Yue Meng and Xu Wang and Zhiyong Zhang and Michael Lupberger and Yorgos Tsipolitis and Maja Mičetić and Krešimir Salamon and Sebastian White},
journal= {arXiv preprint arXiv:2512.19120},
year = {2025}
}
备注
18 pages