利用可微模拟在Coherent CAPTAIN-Mills实验中测量液氩闪烁脉冲形状
仪器与探测器
2025-09-30 v4 高能物理 - 实验
摘要
Coherent CAPTAIN-Mills (CCM)实验是一个液氩(LAr)光收集探测器，用于寻找MeV尺度中微子和超出标准模型物理信号。200个8英寸光电倍增管(PMT)以50%的光阴极覆盖率探测7吨有效体积中带电粒子产生的光。CCM基于光的方法降低了对LAr纯度的要求，相比其他探测技术，可以在无需额外LAr过滤且常见污染物浓度约为百万分之一(O(1) ppm)的情况下可靠探测亚MeV粒子。我们基于MeV尺度电磁事件样本，给出了LAr光产生和传播参数及其不确定性的测量结果。这一高维参数空间的优化得益于可微光学光子蒙特卡洛模拟和详细的PMT响应表征。该结果准确预测了探测器中因闪烁和切伦科夫发射产生的光的时间和空间分布。这是首次对LAr中光子传播的描述包含多种效应，包括：紫外共振附近折射率的反常色散、杂质引起的米氏散射以及切伦科夫光的产生。
引用
@article{arxiv.2507.08887,
title = {Measurement of the Liquid Argon Scintillation Pulse Shape Using Differentiable Simulation in the Coherent CAPTAIN-Mills Experiment},
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:2507.08887},
year = {2025}
}
备注
Added some additional details. Accepted by Physical Review D