基于厚型GEM的多波段密闭多阳极气体光电倍增方法的研究

随着位置灵敏平面气体探测器的发展，基于气体探测器的光电倍增方式成为可能。在已取得自制成功的厚气体电子倍增探测器（THGEM）的基础上，我们提出密闭多阳极气体光电倍增方案。所使用的THGEM单层增益可达10^3-4，能量分辨达到15.9%。本项目将研究不同材料THGEM的出气率及密闭工艺；采用不同光阴极，使其对X射线、近紫区及紫外区光谱范围灵敏；采用多阳极设计实现200um的空间分辨。本项目的研究成果可直接运用于大气切伦科夫光探测、空间高能天体望远镜及其他方面的成像等。

As a new generation gas detector, Thick Gas Electron Multiplier (THGEM) has the potential to work as gaseous photomuliplier. The thinner-THGEM with the single layer gas gain of 10^3-4 and the energy resolution of 15.9% has been built. Based on this, the methods to realize sealed multi-anode gaseous photomuliplier are proposed. In the project, the following topics will be studied: the outgasing rate of different material of THGEM;the photocathod types and film-coating methods to detect violet, ultra-violet and X ray; the multi-anode design to achieve 200 um spatial resolution. The result of this project can be directly used for atmospheric Cherenkov detection and other imaging topics.