超快全光相机对带电粒子的事件级径迹成像
Event-by-event track imaging of charged particles with an ultrafast plenoptic camera
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中文总结 AI 辅助
本研究利用超快全光相机PLATON，通过标定与测试束流实验，首次实现从二维光子匮乏图像中事件级重建基本粒子三维径迹，开辟高分辨率探测新途径。
中文摘要 AI 辅助
现代基本粒子探测器通常需要在大型致密活性体积内实现高分辨率的三维粒子径迹探测，这在标准设备中若无极精细的分割则难以实现。在近期工作中，一种配备单光子雪崩二极管阵列的全光相机（称为PLATON）展示了其对单片闪烁材料中产生的单个可见光子进行成像，并可从单次事件曝光中重建其三维来源的能力，为在未分割闪烁体中实现高空间分辨率的基本粒子探测开辟了道路。然而，这些测试旨在处理几何尺度基本为零的光子源。在本工作中，我们弥合了与径迹探测领域之间的差距。首先，我们利用飞秒红外激光通过双光子吸收在有机塑料闪烁体中诱导的光径迹对PLATON原型进行了标定，并通过一种新算法表征了其重建光子匮乏的三维直线径迹的能力，与定制蒙特卡洛模拟取得了良好的一致性。最后，PLATON原型在CERN质子同步加速器上暴露于π介子测试束流中。首次，全光探测器系统被成功用于从二维光子匮乏图像中，以事件级为基础探测并重建基本粒子的三维径迹，标志着高分辨率测量的一种变革性方法。
英文摘要
Modern elementary particle detectors often require high-resolution three-dimensional particle tracking in large dense active volumes, which is difficult to achieve in standard devices without an extremely fine segmentation. In recent work, a plenoptic camera instrumented with a single-photon avalanche-diode array, called PLATON, demonstrated to image individual visible photons generated in monolithic scintillating material and reconstruct their three-dimensional origin from a single-event exposure, opening a route to high-spatial-resolution detection of elementary particles in unsegmented scintillator. However, those tests aimed to address photon sources of essentially zero geometric extent. In this work we close the gap to the tracking regime. First, we calibrated the PLATON prototype using light tracks in an organic plastic scintillator induced by a femtosecond infrared laser via two-photon absorption and characterised its capability to reconstruct photon-starved 3D lines with a novel algorithm, achieving good agreement with custom Monte Carlo simulation. Finally, the PLATON prototype was exposed to a test beam of pions at the CERN Proton Synchrotron. For the first time, a plenoptic detector system was successfully used to detect and reconstruct the 3D tracks of elementary particles from 2D photon-starved images on an event-by-event basis marking a transformative approach to high-resolution measurements.
发表机构
- ETH Zürich（苏黎世联邦理工学院）
- Università degli Studi Roma Tre（罗马第三大学）
- Istituto Nazionale di Ottica - CNR（意大利国家光学研究所-国家研究委员会）
- INFN Sezione di Roma Tre（罗马第三大学意大利国家核物理研究所分部）
- Politecnico di Bari（巴里理工大学）
- INFN Sezione di Bari（巴里意大利国家核物理研究所分部）
- École polytechnique fédérale de Lausanne (EPFL)（洛桑联邦理工学院）
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