在CRESST-II第二阶段运行的高效表面α事件抑制探测器模块
仪器与探测器
2016-01-26 v2 宇宙学与河外天体物理
天体物理仪器与方法
摘要
低温暗物质实验CRESST-II旨在通过闪烁CaWO晶体中原子核的弹性散射直接探测WIMP。我们介绍了一种新的、大幅改进的探测器设计，已安装在当前运行的CRESST-II第二阶段中，具有高效的主动表面α本底抑制。使用CaWO棒代替金属夹来固定目标晶体，实现了具有全闪烁内表面的探测器外壳。所展示的探测器（TUM40）提供了极佳的能量阈值keV和能量分辨率 keV（在2.60keV处）。由于本底水平显著降低，TUM40对自旋无关的WIMP-核子散射截面设置了严格的限制，并探测了WIMP质量低于3GeV/c的新参数空间区域。本文详细讨论了新型探测器设计和表面α事件抑制。
引用
@article{arxiv.1410.1753,
title = {A detector module with highly efficient surface-alpha event rejection operated in CRESST-II Phase 2},
author = {R. Strauss and G. Angloher and A. Bento and C. Bucci and L. Canonica and A. Erb and F. v. Feilitzsch and N. Ferreiro and P. Gorla and A. Gütlein and D. Hauff and J. Jochum and M. Kiefer and H. Kluck and H. Kraus and J. -C. Lanfranchi and J. Loebell and A. Münster and F. Petricca and W. Potzel and F. Pröbst and F. Reindl and S. Roth and K. Rottler and C. Sailer and K. Schäffner and J. Schieck and S. Scholl and S. Schönert and W. Seidel and M. v. Sivers and M. Stanger and L. Stodolsky and C. Strandhagen and A. Tanzke and M. Uffinger and A. Ulrich and I. Usherov and S. Wawoczny and M. Willers and M. Wüstrich and A. Zöller},
journal= {arXiv preprint arXiv:1410.1753},
year = {2016}
}
备注
9 pages, 6 figures