Radiation length imaging with high-resolution telescopes
Radiation length imaging with high-resolution telescopes
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DOI：
10.1016/j.nima.2016.06.086
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发表时间：
2016-09
影响因子：
1.4
通讯作者：
U. Stolzenberg;A. Frey;B. Schwenker;P. Wieduwilt;C. Marinas;F. Lutticke
中科院分区：
文献类型：
--
作者：
U. Stolzenberg;A. Frey;B. Schwenker;P. Wieduwilt;C. Marinas;F. Lutticke
低质量顶点探测器的建设与高水平的系统集成是下一代对撞机实验的极大兴趣。具有足够空间分辨率的辐射长度图像可用于测量和解开复杂的辐射长度X/X 0轮廓，并有助于理解顶点探测器系统。多GeV粒子束和高分辨率跟踪望远镜的测试束实验提供了一个机会，以获得精确的二维图像的薄平面物体的辐射长度。X/X 0成像的核心是对穿过研究对象的粒子的散射角进行空间分辨测量。主要的挑战是基准望远镜的校准和角分辨率的校准。为了验证X/X 0成像的能力，进行了测试束实验。受试器械是贝儿II顶点探测器的两个机械原型模块。已经收集了4 GeV的1亿条径迹的数据样本，这足以解决30 μ m尺度上的复杂材料剖面。
The construction of low mass vertex detectors with a high level of system integration is of great interest for next generation collider experiments. Radiation length images with a sufficient spatial resolution can be used to measure and disentangle complex radiation length X/X 0 profiles and contribute to the understanding of vertex detector systems. Test beam experiments with multi GeV particle beams and high-resolution tracking telescopes provide an opportunity to obtain precise 2D images of the radiation length of thin planar objects. At the heart of the X/X 0 imaging is a spatially resolved measurement of the scattering angles of particles traversing the object under study. The main challenges are the alignment of the reference telescope and the calibration of its angular resolution. In order to demonstrate the capabilities of X/X 0 imaging, a test beam experiment has been conducted. The devices under test were two mechanical prototype modules of the Belle II vertex detector. A data sample of 100 million tracks at 4 GeV has been collected, which is sufficient to resolve complex material profiles on the 30 μ m scale.