A luminosity monitor, based on plastic scintillator detectors, has been developed for the SIDDHARTA-2 experiment aiming to perform high precision measurements of kaonic atoms and was installed in 2020 on the DAΦNE e+e− collider at LNF (Laboratori Nazionali di Frascati, INFN). The main goal of this system is to provide the instantaneous and integrated luminosity of the DAΦNE facility by measuring the rate of K+K− correlated pairs emitted by the meson decay. This task requires an accurate timing of the DAQ signals, as well as timing resolution below 1 ns, in order to disentangle the K± signals from the background minimum ionizing particles (MIPs) produced during the e+ e− collisions at DAΦNE. In this paper the luminosity monitor concept as well as its laboratory characterization and the first results inside DAΦNE are presented.

中文翻译：

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SIDDHARTA-2 光度监测器的表征

已经为 SIDDHARTA-2 实验开发了一种基于塑料闪烁体探测器的光度监视器，旨在对 kaonic 原子进行高精度测量，并于 2020 年安装在 LNF（Laboratori Nazionali di Frascati，INFN）的 DAΦNE e+e− 对撞机上）。该系统的主要目标是通过测量介子衰变发射的 K+K− 相关对的速率来提供 DAΦNE 设施的瞬时和综合光度。此任务需要 DAQ 信号的准确计时，以及低于 1 ns 的计时分辨率，以便从 DAΦNE 的 e+ e- 碰撞期间产生的背景最小电离粒子 (MIP) 中分离出 K± 信号。在本文中，介绍了亮度监测器的概念及其实验室特性和 DAΦNE 内部的第一个结果。