The Positron Annihilation into Dark Matter Experiment (PADME) aims to search for the production of a dark photon in the process e + e − → A 'γ. It will use the 550 MeV positron beam provided by the DAΦNE LINAC impinging on a thin target. In case of annihilation, the accompanying ordinary photon is detected by the electromagnetic calorimeter regardless of the dark photon decay products. A single kinematic variable, the missing mass, characterizes the process, which should peak at m A ' in case of A ' production. An overview of each component, and a description of the chosen technical solutions implemented to accomplish the experiment needs will be given.

中文翻译：

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LNF的PADME实验

正电子ni灭暗物质实验（PADME）的目的是在过程e + e-→A'γ中寻找暗光子的产生。它将使用DAΦNELINAC提供的550 MeV正电子束撞击薄目标。在an没的情况下，电磁量热计会检测伴随的普通光子，而与暗光子的衰变产物无关。一个运动学变量，即缺失质量，代表了过程的特征，在产生A'的情况下，应在m A'达到峰值。将给出每个组件的概述，以及为实现实验需求而实施的所选技术解决方案的说明。