用于μ介子层析成像应用的切伦科夫探测器原型鉴定

IF 2.5 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS
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引用次数: 0

摘要

μ介子成像技术是一种创新的成像技术,利用自然产生的基本粒子--大气μ介子--来确定大质量物体内部的密度分布。通过散射或吸收对粒子通量的改变反映了介质内部密度的对比,从而为交叉体积的成像提供了可能。在大多数μ射线成像装置中,成像过程都是基于对粒子的跟踪,其中考虑了μ介子轨迹的吸收或散射。由于粒子的能量和特征(即所谓的 PID)传统上依赖于热量计和/或高强度磁场的使用,因此这些信息都没有被利用。这两种技术都有碍于探测器的便携性,而这对于μ射线摄影来说是非常重要的,因此这两种技术对于μ射线摄影来说并不实用。在本文中,我们描述了一种简单而小巧的水切伦科夫探测器的性能,这种探测器能够对μ介子的能量和穿越粒子的PID提供一些见解,在与μ介子望远镜结合使用时,有可能改善μ摄影测量的背景抑制。我们测试了这种水切伦科夫探测器的原型,它与两台小型μ介子望远镜结合使用。这两个系统使用相同的光电链--光纤和像素化光敏传感器--以及相同的数据采集(DAQ)读出系统,从而确保了在目前运行的系统中轻松集成和实施。本文介绍了测试装置、探测器对宇宙μ介子的响应,以及根据其几何形状和探测原理的基本模拟进行的性能评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Prototype Cherenkov detector characterization for muon tomography applications

Muography is an innovative imaging technique using naturally produced elementary particles – atmospheric muons – used to determine the distribution of density inside massive objects. The modification of the particles flux – by scattering or absorption – reflects the contrasts in density within the medium and therefore offers the possibility for an image of the crossed volumes. In most muography setups the imaging process is based on the tracking of the particles which accounts for the absorption or the scattering of the muons trajectories. Neither the energy nor the identity of the particles (the so-called PID) is exploited since this information traditionally relies on the use of calorimeters and/or high intensity magnetic fields. Both these techniques hinder detector portability which in the case of muography is important and this renders them impractical for its purpose. In this paper we characterize the performance of a simple and small water Cherenkov detector capable of providing some insights on the energy of muons and the PID for the crossing particles that could potentially improve the background rejection for a muography survey when operating in conjunction with a muon telescope. We tested a prototype of such water Cherenkov detector in combination with two small muon hodoscopes. Both systems are using the same opto-electronics chain – optical fibers and pixellized photosensors – and the same data acquisition (DAQ) readout system which ensures an easy integration and implementation within presently running systems. This article presents the test setup, the detector response to cosmic muons and its performance evaluation against a basic simulation of its geometry and detection principle.

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来源期刊
Nuclear Physics B
Nuclear Physics B 物理-物理:粒子与场物理
CiteScore
5.50
自引率
7.10%
发文量
302
审稿时长
1 months
期刊介绍: Nuclear Physics B focuses on the domain of high energy physics, quantum field theory, statistical systems, and mathematical physics, and includes four main sections: high energy physics - phenomenology, high energy physics - theory, high energy physics - experiment, and quantum field theory, statistical systems, and mathematical physics. The emphasis is on original research papers (Frontiers Articles or Full Length Articles), but Review Articles are also welcome.
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