We have initiated a search for a new type of nuclear matter, the e???-mesic nucleus, using beams from the multi-GeV hadron facility, COSY at Juelich, Germany. A large acceptance scintillator detector, ENSTAR has been designed and built at BARC, Mumbai and fully assembled and tested at COSY. A test run for calibration and evaluation has been completed. In this contribution we present the design and technical details of the ENSTAR detector and how it will be used to detect protons and pions (the decay products of e???-mesic bound state). The detector is made of plastic scintillators arranged in three concentric cylindrical layers. The readout of the detectors is by means of optical fibres. The layers are used to generate e??￥ e??? - e??? spectra for particle identification and total energy information of stopped particles. The granularity of the detector allows for position (e??? and e???) determination making the event reconstruction kinematically complete.
展开▼
机译：我们已经开始使用来自德国Juelich的多GeV强子设施COZY的光束，寻找一种新型的核物质，即e ???-原子核。大型可接受闪烁体探测器ENSTAR是在孟买BARC设计和制造的，并在COSY进行了完全组装和测试。用于校准和评估的测试运行已完成。在这篇论文中，我们介绍了ENSTAR探测器的设计和技术细节，以及如何将其用于探测质子和介子（eπ-介导束缚态的衰变产物）。该探测器由塑料闪烁体制成，该闪烁体布置在三个同心的圆柱层中。通过光纤读取检测器。这些图层用于生成e ?? ￥ e ??? -e ???用于识别颗粒的光谱和停止的颗粒的总能量信息。检测器的粒度允许确定位置（e-和e-），使事件重建在运动学上完成。
展开▼
