微结构气体探测器（MPGD）是适应于新一代粒子物理和核物理实验的新型气体探测技术，在各个主要性能上较前一代探测器有显著提高，具有广阔的科学和应用前景。厚气体电子倍增器（THGEM）是MPGD的主要设计之一，尤其适合大面积、高耐用性的实验需求。多层THGEM（M-THGEM）是最新的设计思路，发展了THGEM的优势性能，并在电子输运、增益、耐用性和稳定性方面有更好的表现，值得深入研究和发展。本项目拟通过实验测试和模拟分析对比，开展M-THGEM的研制和主要特性研究，获得对M-THGEM工作机制的充分认识，研制紧凑型M-THGEM探测器，并在位置和能量分辨、介质充电效应以及阳离子回流等重要性能上进行深度研究。

The Micro-Pattern Gaseous Detector (MPGD) has been developed to fulfill the stringent requirements imposed by the new generation of nuclear and particle physics experiment. Compared to the previous generation of gaseous detector, MPGD has shown significant improvements in most operation parameters, and very promising application prospect in scientific research and beyond. The THick Gas Electron Multiplier (THGEM) is one of the major MPGD design, and is particularly suitable for large area, and high durability detectors. The Multi-layer THGEM (M-THGEM) is the latest development of such kind of design. While keeping the advantage of THGEM, M-THGEM has even better properties on electron transport, gain, durability and stability, which is worthy of further research and development. This project will study the new M-THGEM technique by experiment test and simulation analysis. The main features of M-THGEM will be measured and compared to MC simulation, in order to understand the operation mechanism of M-THGEM. Special focus will be put on the development of compact M-THGEM detector, and selected important characteristics of M-THGEM detector, including the position and energy resolution, dielectric charging effect and ion back flow (IBF).