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arXiv 2109.03078physics.ins-det
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用于ND280/T2K升级的4pi飞行时间探测器

A 4pi time-of-flight detector for the ND280/T2K upgrade

A. Korzenev, F. Barao, S. Bordoni, D. Breton, F. Cadoux, Y. Favre, M. Khabibullin, A. Khotyantsev, Y. Kudenko, T. Lux, J. Maalmi, P. Mermod, O. Mineev, F. Sanchez

摘要:

ND 280是日本J-PARC加速器综合体中T2 K实验的近探测器。经过十年卓有成效的数据采集,ND 280计划升级。本文中描述的飞行时间(ToF)探测器是将安装在ND 280篮中的三个新探测器之一。ToF探测器具有模块化结构。每个模块代表20个塑料闪烁体棒的阵列,这些闪烁体棒堆叠在2.4 x 2.2 m2面积的平面中。六个类似结构的模块将组装在一个立方体中,从而为一个活跃的中微子目标和两个TPC提供一个几乎4 π的外壳。闪烁体发出的光被大面积硅光电倍增器(SiPM)阵列吸收,SiPM阵列附着在每个棒的两端。SiPM的读出、阵列内的各个SiPM信号的整形和模拟求和由分立电路放大器执行。当用宇宙μ子测量时,单个棒的平均时间分辨率约为0.14 ns。探测器将安装在ND 280的篮子里,在那里它将被用来否决来自中微子目标之外的粒子,提高粒子识别能力,并为内部探测器的校准提供宇宙触发器。

英文摘要:

ND280 is a near detector of the T2K experiment which is located in the J-PARC accelerator complex in Japan. After a decade of fruitful data-taking, ND280 is scheduled for upgrade. The time-of-flight (ToF) detector, which is described in this article, is one of three new detectors that will be installed in the basket of ND280. The ToF detector has a modular structure. Each module represents an array of 20 plastic scintillator bars which are stacked in a plane of 2.4 x 2.2 m2 area. Six modules of similar construction will be assembled in a cube, thus providing an almost 4pi enclosure for an active neutrino target and two TPCs. The light emitted by scintillator is absorbed by arrays of large-area silicon photo-multipliers (SiPMs) which are attached to both ends of every bar. The readout of SiPMs, shaping and analog sum of individual SiPM signals within the array are performed by a discrete circuit amplifier. An average time resolution of about 0.14 ns is achieved for a single bar when measured with cosmic muons. The detector will be installed in the basket of ND280, where it will be used to veto particle originating outside the neutrino target, improve the particle identification and provide a cosmic trigger for calibration of detectors which are enclosed inside it.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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