用于PICOSEC Micromegas探测器的新型类金刚石碳基光电阴极
仪器与探测器
2024-08-01 v5 高能物理 - 实验
摘要
PICOSEC Micromegas (MM) 探测器是一种基于工作在两级放大模式下的MM探测器和切伦科夫辐射体的精密定时气体探测器。配备碘化铯(CsI)光电阴极的原型机已显示出对于最小电离粒子高达24皮秒(ps)的优异时间分辨率。然而，由于CsI光电阴极的高吸湿性和对离子轰击的敏感性，需要替代的光电阴极材料来提高PICOSEC MM的鲁棒性。类金刚石碳(DLC)薄膜作为一种新型的鲁棒光电阴极材料被引入，并已显示出有希望的结果。制备了一批不同厚度的DLC光电阴极，并使用紫外光进行了评估。量子效率测量表明，DLC光电阴极的最佳厚度约为3 nm。此外，与CsI光电阴极相比，DLC光电阴极在老化测试中显示出良好的抗离子轰击能力。最后，在μ子束中测试了配备DLC光电阴极的PICOSEC MM原型机。对于150 GeV/c的μ子，获得了约42 ps的时间分辨率和97%的探测效率。这些结果表明DLC作为PICOSEC MM探测器光电阴极的巨大潜力。
引用
@article{arxiv.2406.08712,
title = {A Novel Diamond-like Carbon based photocathode for PICOSEC Micromegas detectors},
author = {X. Wang and R. Aleksan and Y. Angelis and J. Bortfeldt and F. Brunbauer and M. Brunoldi and E. Chatzianagnostou and J. Datta and K. Degmelt and G. Fanourakis and D. Fiorina and K. J. Floethner and M. Gallinaro and F. Garcia and I. Giomataris and K. Gnanvo and F. J. Iguaz and D. Janssens and A. Kallitsopoulou and M. Kovacic and B. Kross and P. Legou and M. Lisowska and J. Liu and I. Maniatis and J. McKisson and Y. Meng and H. Muller and E. Oliveri and G. Orlandini and A. Pandey and T. Papaevangelou and M. Pomorski and L. Ropelewski and D. Sampsonidis and L. Scharenberg and T. Schneider and L. Shang and M. Shao and L. Sohl and M. van Stenis and Y. Tsipolitis and S. E. Tzamarias and A. Utrobicic and I. Vai and R. Veenhof and P. Vitulo and S. White and W. Xi and Z. Zhang and Y. Zhou},
journal= {arXiv preprint arXiv:2406.08712},
year = {2024}
}