在JLab进行光暗物质搜索的BDX-MINI探测器
The BDX-MINI detector for Light Dark Matter search at JLab
摘要：
本文介绍了一种紧凑的探测器，BDX-MINI，它结合了优化的光暗物质的电子束流收集器中产生的检测的概念的所有功能的设计和性能。它代表了预计在JLAB运行的未来BDX实验的简化版本。BDX-MINI暴露于由2.176 GeV电子束入射到杰斐逊实验室A厅束流收集器产生的穿透粒子。该探测器由30.5公斤的PbWO 4晶体组成，在束流收集器之后有足够的材料来消除除中微子之外的所有已知粒子。晶体用硅光电倍增器读出。探测器的周围是一层无源钨层和两个有源闪烁体否决系统，它们也是用硅光电倍增器读出的。该设计得到了验证，稳健探测器的性能在六个月的时间内保持稳定，在此期间，探测器以最小的访问进行操作。
英文摘要：
This paper describes the design and performance of a compact detector, BDX-MINI, that incorporates all features of a concept that optimized the detection of light dark matter produced by electrons in a beam dump. It represents a reduced version of the future BDX experiment expected to run at JLAB. BDX-MINI was exposed to penetrating particles produced by a 2.176 GeV electron beam incident on the beam dump of Hall A at Jefferson Lab. The detector consists of 30.5 kg of PbWO4 crystals with sufficient material following the beam dump to eliminate all known particles except neutrinos. The crystals are read out using silicon photomultipliers. Completely surrounding the detector are a passive layer of tungsten and two active scintillator veto systems, which are also read out using silicon photomultipliers. The design was validated and the performance of the robust detector was shown to be stable during a six month period during which the detector was operated with minimal access.
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