液氩中亚MeV粒子切伦科夫辐射的首次逐事例识别
仪器与探测器
2025-09-30 v4 高能物理 - 实验
摘要
本快报报告了Coherent CAPTAIN-Mills (CCM)实验在高闪烁光产额的液氩(LAr)探测器中，对亚MeV电子产生的切伦科夫光进行了逐事例观测。CCM200探测器位于洛斯阿拉莫斯国家实验室，其7吨(有效体积)的液氩由200个8英寸光电倍增管(PMT)进行探测，其中80%涂有波长位移材料，其余20%未涂覆。在事件的瞬发时间区域(定义为相对于事件起始时间的 ns)，未涂覆的PMT主要对可见切伦科夫光子敏感。利用Na源产生的伽马射线产生亚MeV电子，我们以的置信度分离出瞬发切伦科夫光，并开发了一种选择方法以获得低本底电磁样本。这是在高产额闪烁体探测器中首次对亚MeV电子产生的切伦科夫光子进行逐事例观测，代表了低能粒子探测器发展的一个里程碑。
引用
@article{arxiv.2507.08886,
title = {First Event-by-Event Identification of Cherenkov Radiation from Sub-MeV Particles in Liquid Argon},
author = {A. A. Aguilar-Arevalo and S. Biedron and J. Boissevain and M. Borrego and L. Bugel and M. Chavez-Estrada and J. M. Conrad and R. L. Cooper and J. R. Distel and J. C. D'Olivo and E. Dunton and B. Dutta and D. E. Fields and M. Gold and E. Guardincerri and E. C. Huang and N. Kamp and D. Kim and K. Knickerbocker and W. C. Louis and C. F. Macias-Acevedo and R. Mahapatra and J. Mezzetti and J. Mirabal and M. J. Mocko and D. A. Newmark and P. deNiverville and C. O'Connor and V. Pandey and D. Poulson and H. Ray and E. Renner and T. J. Schaub and A. Schneider and M. H. Shaevitz and D. Smith and W. Sondheim and A. M. Szelc and C. Taylor and A. Thompson and W. H. Thompson and M. Tripathi and R. T. Thornton and R. Van Berg and R. G. Van de Water},
journal= {arXiv preprint arXiv:2507.08886},
year = {2025}
}
备注
Added additional data driven check and changed few plotting styles. Accepted by Physical Review Letters