arXiv 2202.073062022-02-15hep-exphysics.ins-det

DESY的任意光粒子搜索实验

The Any Light Particle Search experiment at DESY

Katharina-Sophie Isleif

DOI：: 10.3103/S002713492202045X

摘要：

任意光粒子搜索（ALPS~II）是一项光穿墙实验，目的是寻找亚电子伏特质量范围内的类轴子基本粒子，这些粒子是天体物理学和宇宙学的产物，符合暗物质的要求。ALPS~II的目标是测量$2\times 10^{-11}\,\mathrm{GeV^{-1}}$的轴子-光子耦合，这比以前的LSW实验好几个数量级，因此将研究一个新的参数范围。通过将磁场相互作用长度提高到2 $\times$ × 106 μ m，并通过在不透光屏障的每一侧上放大光腔中的信号，实现了提高的性能。预期信号为每天1个光子的量级，其将由具有非常低的$\mathcal O(10^{-6}\,\mathrm{Hz})$暗计数率的光子探测器测量。本文介绍了单光子探测的实验设计、研究现状和进展，重点介绍了单光子探测技术。

英文摘要：

The Any Light Particle Search (ALPS~II) is a light shining through a wall (LSW) experiment searching for axion-like elementary particles in the sub-eV mass range, which are motivated by astrophysics and cosmology and fulfill the requirements for being dark matter. ALPS~II aims to measure an axion-to-photon coupling of $2\times 10^{-11}\,\mathrm{GeV^{-1}}$, which is several orders of magnitude better than that of previous LSW experiments and will thus investigate a new parameter range. The increased performance is achieved by enhancing the magnetic field interaction length to 2 $\times$ 106\,m and by amplifying the signal in an optical cavity on each side of a light-tight barrier. The expected signal is in the order of 1 photon per day, which will be measured by photon detectors with very low dark count rates of $\mathcal O(10^{-6}\,\mathrm{Hz})$. This article gives a technical overview on the experiment design, previous and ongoing investigations and the current status with focus on the single photon detection.

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