The Belle II imaging Time-of-Propagation (iTOP) detector
The Belle II imaging Time-of-Propagation (iTOP) detector
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DOI：
10.1016/j.nima.2017.02.045
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发表时间：
2017-02
影响因子：
1.4
通讯作者：
J. Fast
中科院分区：
文献类型：
--
作者：
J. Fast
高精度的味道物理测量是在LHC ATLAS和CMS实验中直接寻找新物理的重要补充。这些测量将使用升级后的贝儿II探测器进行，该探测器将在SuperKEKB加速器上获取数据。由于KEKB的亮度是其40倍，因此探测器系统必须以比原始贝儿探测器高得多的速率有效地运行。升级的一个核心要素是枪管颗粒识别系统。贝儿二号建造并安装了一个成像传播时间（iTOP）探测器。iTOP使用石英光学器件作为切伦科夫辐射器。光子通过全内反射沿石英棒向下传输，在前端使用球面镜将光子反射到后端，在后端将光子成像到分段微通道板光电倍增管（MCP-PMT）阵列上。该系统使用每秒千兆采样波形采样专用集成电路（ASIC）读出。每个事件的光子的组合时间和空间分布用于确定粒子种类。本文概述了iTOP系统。
High precision flavor physics measurements are an essential complement to the direct searches for new physics at the LHC ATLAS and CMS experiments. Such measurements will be performed using the upgraded Belle II detector that will take data at the SuperKEKB accelerator. With 40x the luminosity of KEKB, the detector systems must operate efficiently at much higher rates than the original Belle detector. A central element of the upgrade is the barrel particle identification system. Belle II has built and installed an imaging-Time-of-Propagation (iTOP) detector. The iTOP uses quartz optics as Cherenkov radiators. The photons are transported down the quartz bars via total internal reflection with a spherical mirror at the forward end to reflect photons to the backward end where they are imaged onto an array of segmented Micro-Channel Plate Photo-Multiplier Tubes (MCP-PMTs). The system is read out using giga-samples per second waveform sampling Application-Specific Integrated Circuits (ASICs). The combined timing and spatial distribution of the photons for each event are used to determine particle species. This paper provides an overview of the iTOP system.