面向下一代高能物理量能器的超快且抗辐射GAGG的开发
Development of Ultrafast and Radiation-Hard GAGG for the Next-Generation of High-Energy Physics Calorimeters
浏览论文内容
中文总结 AI 辅助
针对高亮度对撞机需求，通过二价共掺杂优化GAGG闪烁动力学，实现5.5 ns有效衰减时间并保持高光产额，经1 MGy质子辐照后性能稳定，成为下一代高能物理量能器的可行候选。
中文摘要 AI 辅助
高能物理（HEP）向未来高亮度（HL）对撞机实验（如HL-LHC）的发展，要求开发兼具高密度、优异抗辐射性和超快响应的闪烁材料。虽然掺铈钆铝镓石榴石（GAGG:Ce）具有非常高的光产额和抗辐照能力，但其约50-60 ns的典型衰减时间可能导致高计数率环境中的堆积效应。本文报告了由Crytur生长的多种加速型GAGG组分的开发及多阶段表征，这些组分针对时间性能进行了优化。通过利用二价共掺杂来调控闪烁动力学，我们实现了低至5.5 ns的有效衰减时间（tau_d,eff），同时保持了每MeV数千光子的竞争性光产额。实验室表征表明，伽马射线激发下的时间分辨率与商用GAGG相当，而用120 GeVπ介子测量的时间分辨率达到了与最先进的LYSO:Ce,Ca相当的性能水平。经过1 MGy质子辐照实验后，该材料保留了大部分光学透射率。结果证实，这种超快GAGG组分是下一代HEP量能器和时间探测器可行的候选材料。
英文摘要
The evolution of High Energy Physics (HEP) toward future collider experiments with High Luminosity (HL), such as the HL-LHC, requires the development of scintillating materials that combine high density, excellent radiation hardness and an ultrafast response. While Cerium-doped Gadolinium Aluminum Gallium Garnet (GAGG:Ce) offers a very high light yield and resilience to irradiation, its typical decay time of approximately 50-60 ns may lead to pile-up effects in high-rate environments. In this paper, we report on the development and multi-stage characterization of various accelerated GAGG compositions optimized for timing performance and grown by Crytur. By taking advantage of divalent co-doping to engineer the scintillation kinetics, we achieved an effective decay time (tau_d,eff) down to 5.5 ns while maintaining a competitive light yield of several thousand photons per MeV. Laboratory characterization demonstrates that the time resolution under gamma-ray excitation is comparable to commercial GAGG, while the time resolution measured with 120 GeV pions reaches performance levels comparable to state-of-the-art LYSO:Ce,Ca. After a 1 MGy proton irradiation campaign the material retains most of its optical transmission. The results confirm that this ultrafast GAGG composition is a viable candidate for the next generation of HEP calorimetry and timing detectors.
发表机构
- European Organization for Nuclear Research (CERN)（欧洲核子研究组织（CERN））
- University Claude Bernard Lyon1（里昂第一大学克洛德·贝尔纳）
- University of Strasbourg（斯特拉斯堡大学）
- Crytur, Ltd（Crytur有限公司）
- Institute of Physics of the Academy of Sciences of the Czech Republic (FZU)（捷克科学院物理研究所（FZU））
机构由 AI 辅助整理，请以论文原文为准。
