Modeling the light response of an optically readout GEM based TPC for the CYGNO experiment
仪器与探测器
2026-02-20 v2
摘要
气体时间投影 Chambers 由于能够探测能量释放于气体原子中的粒子相互作用（能量释放可低至几千克瓦特），从而实现对罕见事件的检测和详细研究，这些仪器正被开发用于天体物理学领域，如暗物质和中微子研究。为实现对敏感体积中事件的高分辨率读出，CYGNO 合作正在开发一种解决方案，该方案利用气体电子倍增阶段中发生的气体电子倍增器 (GEM) 中产生的光通过具有极高灵敏度和空间分辨率的光传感器进行读出。为实现高光输出，需达到约 - 级别的气体增益。实验上，观察到探测器响应随 GEM 孔中收集电荷密度的空间密度而变化，表明可能由乘法通道内空间电荷积累引起的增益降低效应。本文报告了搭载约两升敏感体积的原型机收集的数据，以及合作开发的用于描述和预测增益随电荷密度变化行为的模型。与实验数据比较显示，该模型在近一个数量级范围内准确再现了增益行为，精度达到百分之级。
引用
@article{arxiv.2505.06362,
title = {Modeling the light response of an optically readout GEM based TPC for the CYGNO experiment},
author = {Fernando Dominques Amaro and Rita Antonietti and Elisabetta Baracchini and Luigi Benussi and Stefano Bianco and Roberto Campagnola and Cesidio Capoccia and Michele Caponero and Gianluca Cavoto and Igor Abritta Costa and Antonio Croce and Emiliano Danè and Melba D'Astolfo and Giorgio Dho and Flaminia Di Giambattista and Emanuele Di Marco and Giulia D'Imperio and Joaquim Marques Ferreira dos Santos and Davide Fiorina and Francesco Iacoangeli and Zahoor Ul Islam and Herman Pessoa Lima Junior and Ernesto Kemp and Francesca Lewis and Giovanni Maccarrone and Rui Daniel Passos Mano and Robert Renz Marcelo Gregorio and David Josè Gaspar Marques and Luan Gomes Mattosinhos de Carvalho and Giovanni Mazzitelli and Alasdair Gregor McLean and Pietro Meloni and Andrea Messina and Cristina Maria Bernardes Monteiro and Rafael Antunes Nobrega and Igor Fonseca Pains and Matteo Pantalena and Emiliano Paoletti and Luciano Passamonti and Fabrizio Petrucci and Stefano Piacentini and Davide Piccolo and Daniele Pierluigi and Davide Pinci and Atul Prajapati and Francesco Renga and Rita Joana Cruz Roque and Filippo Rosatelli and Alessandro Russo and Sabrina Salamino and Giovanna Saviano and Federico Francesco Scamporlino and Angelo Serrecchia and Pedro Alberto Oliveira Costa Silva and Neil John Curwen Spooner and Roberto Tesauro and Sandro Tomassini and Samuele Torelli and Donatella Tozzi},
journal= {arXiv preprint arXiv:2505.06362},
year = {2026}
}