类GEM用于X光电子能量沉积增益的实验研究

Experiment Study on the Thick GEM-like Multiplier for X-ray Photoelectrons Energy Deposition Gaining

GEM是一种具有高增益、高时间分辨和空间分辨等优点的新型探测器,仿照其结构设计制作了具有与其相似功能的类GEM。实验研究了类GEM对X光电子在吸收介质中能量沉积的增益特性,实验结果表明类GEM对X光电子在介质中的能量沉积增益是明显的,最大能量沉积能增加40%以上。给出了进一步提高X光电子能量沉积的建议,展望了类GEM倍增X光电子的能量沉积方式在硬X射线成像中的应用前景。

The GEM is a novel detector with high gain, high time and location resolution. Imitating the structure of the GEM, a thick GEM-like multiplier which has the similar function with that of the GEM is designed and manufactured. The characteristics of the thick GEM-like multiplier increasing electron energy deposition in absorbing medium has been experimentally studied. The results indicate that the energy deposition gain of X-ray photoelectron in medium is apparent, and the maximum energy deposition can increase by more than 40%. Some suggestions of further increasing the energy deposition are given, and the future application of the way of increasing the x-ray photoelectron energy deposion by the thick GEM-like multiplier in hard x-ray imaging is prospected.