GEM是一种新型的微结构气体探测器,具有很高的分辨率,能有效处理高计数率,实现亚微秒级时间计数;同时可制作成大面积和空间各种形状。因GEM探测器的优越性能,国际上很多准备升级的大型实验都将选用GEM探测器作为升级装置,其中有中国参与的就有JLab的HallA、LHC的CMS和ALICE实验。同时,GEM探测器的应用非常广泛,如通过选用合适的转换体,GEM GEM is a new type of microstructured gas detector with high resolution, which can effectively handle high counting rate and realize sub-microsecond time counting. At the same time, GEM can be fabricated into various shapes of large area and space. Due to the superior performance of GEM detectors, many large-scale experiments in the world are going to use GEM detectors as upgrade devices. Among them, China has JLab HallA, LHC CMS and ALICE experiments. At the same time, GEM detectors are used in a wide range of applications, such as through the use of a suitable converter, GEM