论文标题
在稀释冰箱中，在温度下降至0.2 K的闪烁探测器中
Scintillation detectors with silicon photomultiplier readout in a dilution refrigerator at temperatures down to 0.2 K
论文作者
论文摘要
我们正在开发一种新型的高亮性原子束，该原子束由一个称为Muonium的两体外来原子（M $ =μ^ + + e^ - $）组成，用于下一代原子物理学和重力相互作用测量。该M来源起源于一片超氟氦（SFHE）的薄片，因此诊断术，以后的测量需要一个检测系统，该检测系统在低于1 K的温度下在稀释的低温恒温器中运行。在本文中，我们描述了Silicon Photoltipliers（SIPMS）在SFHE目标中的硅光层次（SIPMS）的操作和表征。我们显示了信号形状，崩溃电压和单个光子检测效率的温度依赖性，得出结论是可行的，sipms的单光子检测是可行的。此外，我们显示了分段闪烁探测器的发展，其中1.7 K处的16个通道和170 MK处的一个通道使用MUON束进行了委托。
We are developing a novel high-brightness atomic beam, comprised of a two-body exotic atom called muonium (M $ = μ^+ + e^-$), for next-generation atomic physics and gravitational interaction measurements. This M source originates from a thin sheet of superfluid helium (SFHe), hence diagnostics and later measurements require a detection system which is operational in a dilution cryostat at temperatures below 1 K. In this paper, we describe the operation and characterization of silicon photomultipliers (SiPMs) at ultra-low temperatures in SFHe targets. We show the temperature dependence of the signal shape, breakdown voltage, and single photon detection efficiency, concluding that single photon detection with SiPMs below 0.85 K is feasible. Furthermore, we show the development of segmented scintillation detectors, where 16 channels at 1.7 K and one channel at 170 mK were commissioned using a muon beam.
