氩基和氩基混合物中微体探测器的特性
Characterization of microbulk detectors in argon- and neon-based mixtures
摘要：
近年来，一种新型的Micromegas探测器制造技术--Microbulk技术的发展，提高了这种探测器的均匀性和稳定性。在Ar+5%iC_4H_10中，在5.9 keV能量下，能量分辨率可达11%FWHM。该探测器具有结构灵活、材料成本低、放射性纯度高等优点。两个microbulk检测器的间隙为50和25微米，其特征在于在氩气和氩气为基础的混合物与乙烷，异丁烷和环己烷。将介绍和讨论结果。用Rose-Korff增益模型对增益曲线进行了拟合，得到了电子平均自由程和电离阈值能量的依赖关系。这两个参数和能量分辨率之间的可能关系也将被讨论。
英文摘要：
A recent Micromegas manufacturing technique, so called Microbulk, has been developed, improving the uniformity and stability of this kind of detectors. Excellent energy resolutions have been obtained, reaching values as low as 11% FWHM at 5.9 keV in Ar+5%iC4H10. This detector has other advantages like its flexible structure, low material budget and high radio-purity. Two microbulk detectors with gaps of 50 and 25 um have been characterized in argon- and neon-based mixtures with ethane, isobutane and cyclohexane. The results will be presented and discussed. The gain curves have been fitted to the Rose-Korff gain model and dependences of the electron mean free path and the threshold energy for ionization have been obtained. The possible relation between these two parameters and the energy resolution will be also discussed.
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