The NA62 experiment is a fixed-target experiment at CERN SPS. The main goal of the experiment is to measure the branching ratio of the ultra-rare kaon decay $K^{+}\to\pi^{+}\nu\bar\nu$. The NA62 detector allows also to study other rare kaon decays and to search for very weakly coupled particles of MeV-GeV mass-scale. The new ANTI-0 hodoscope is proposed and designed to veto events with charged halo particles entering the decay volume. It is now being assembled at CERN. The detector design, the performance simulation and the results of measurements with cosmic rays and test beams for the individual elements are presented. The commissioning and the first run of data-taking is scheduled for after the end of LS2 long shutdown (April 2021).

中文翻译：

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用于欧洲核子研究中心 NA62 实验的新型否决权数仪 ANTI-0

NA62 实验是 CERN SPS 的固定目标实验。实验的主要目标是测量超稀有 kaon 衰变 $K^{+}\to\pi^{+}\nu\bar\nu$ 的分支率。NA62 探测器还允许研究其他罕见的 kaon 衰变并搜索 MeV-GeV 质量尺度的非常弱耦合的粒子。新的 ANTI-0 hodoscope 被提议和设计用于否决带电晕粒子进入衰变体积的事件。它现在正在欧洲核子研究中心组装。介绍了探测器设计、性能模拟以及宇宙射线和测试光束对单个元素的测量结果。调试和第一次数据采集计划在 LS2 长期停产（2021 年 4 月）结束后进行。