A CaMoO4 Crystal Low Temperature Detector for the AMoRE Neutrinoless Double Beta Decay Search
G. B. Kim, S. Choi, F. A. Danevich, A. Fleischmann, C. S. Kang, H. J. Kim, S. R. Kim, Y. D. Kim, Y. H. Kim, V. A. Kornoukhov, H. J. Lee, J. H. Lee, M. K. Lee, S… 展开作者
G. B. Kim, S. Choi, F. A. Danevich, A. Fleischmann, C. S. Kang, H. J. Kim, S. R. Kim, Y. D. Kim, Y. H. Kim, V. A. Kornoukhov, H. J. Lee, J. H. Lee, M. K. Lee, S. J. Lee, J. H. So, W. S. Yoon
备注：
6 pages, 8 figures, 1 table. Published in Advanced in High Energy Physics
发表信息：
Advances in High Energy Physics, Volume 2015 (2015), Article ID 817530
We report the development of a CaMoO4 crystal low temperature detector for the AMoRE neutrinoless double beta decay (0ν\b{eta}\b{eta}) search experiment. The prototype detector cell was composed of a 216 g CaMoO4 crystal and a metallic magnetic calorimeter. An over-ground measurement demonstrated FWHM resolution of 6-11 keV for full absorption gamma peaks. Pulse shape discrimination was clearly demonstrated in the phonon signals, and 7.6 σ of discrimination power was found for the α and \b{eta}/γ separation. The phonon signals showed rise-times of about 1 ms. It is expected that the relatively fast rise-time will increase the rejection efficiency of two-neutrino double beta decay pile-up events which can be one of the major background sources in 0ν\b{eta}\b{eta} searches.
Measurement of the Background Activities of a 100Mo-enriched Powder Sample for an AMoRE Crystal Material by using Fourteen High-Purity Germanium Detectors
A feasibility study of extruded plastic scintillator embedding WLS fiber for AMoRE-II muon veto
AMoRE-II是高级钼基稀有过程实验的第二阶段，目的是使用约200公斤含氘低温探测器寻找100 Mo同位素的无中微子双β衰变。AMoRE-II需要使用各种方法将本底水平保持在10-5计数/keV/kg/年以下，以最大限度地提高灵敏度。方法之一是在远离宇宙射线背景的地下深处进行实验。AmoRE-II将在Yemilab运行，深度约为1，000米。然而，即使在如此深的地下环境中，仍然存在幸存的宇宙μ子，它们会影响测量，应尽可能排除。μ子否决探测器是必要的，以拒绝μ子诱导的粒子进入内部探测器，其中低温探测器位于。我们已经研究了使用挤出塑料闪烁体和波长漂移光纤与SiPM一起作为μ子否决系统的可能性。我们发现最佳的结构是两层塑料分离器（PS，150 cm x 25 cm x 1.2 cm），每个槽有两个WLS光纤，它可以很好地分离放射性γ，μ子探测效率在99.4%以上。基于700米深地下原型测量的预期通量，我们发现，在Yemilab的AMoRE-II的μ子否决系统的死时间为1 ms否决窗口的0.6%的整个μ子事件。
