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arXiv 1407.7013physics.ins-detastro-ph.IM
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在微型时间投影室中对核素的三维跟踪

3-D Tracking of Nuclear Recoils in a Miniature Time Projection Chamber

S. E. Vahsen, M. T. Hedges, I. Jaegle, S. J. Ross, I. S. Seong, T. N. Thorpe, J. Yamaoka, J. A. Kadyk, M. Garcia-Sciveres

摘要:

核反冲的三维重建对于快速中子的定向探测和对弱相互作用大质量粒子(WIMPs)的方向敏感的搜索是很有意义的,而WIMPs可能构成宇宙的暗物质。我们证明了这种能力与一个微型气体目标时间投影室(TPC)的漂移电荷是雪崩倍增与气体电子倍增器(GEM)和检测与ATLAS FE-I3像素专用集成电路(ASIC)。我们报告的性能表征的检测器,包括测量的增益,增益分辨率,点分辨率,扩散,角分辨率和能量分辨率与低能量的X射线,宇宙射线和α粒子,使用气体Ar:CO $_2$(70:30)和他:CO $_2$(70:30)在大气压下。我们讨论了未来的影响,更大的定向中子和暗物质探测器。着眼于设计和选择这些组件,我们概括我们的结果到检测器性能的分析表达式尽可能。最后,我们展示了3-D定向检测的快中子源。

英文摘要:

The three-dimensional (3-D) reconstruction of nuclear recoils is of interest for directional detection of fast neutrons and for direction-sensitive searches for weakly interacting massive particles(WIMPs), which may constitute the Dark Matter of the universe. We demonstrate this capability with a miniature gas target Time Projection Chamber (TPC) where the drift charge is avalanche-multiplied with Gas Electron Multipliers (GEMs) and detected with the ATLAS FE-I3 Pixel Application Specific Integrated Circuit (ASIC). We report on performance characterization of the detector, including measurements of gain, gain resolution, point resolution, diffusion, angular resolution, and energy resolution with low-energy x-rays, cosmic rays, and alpha particles, using the gases Ar:CO$_2$ (70:30) and He:CO$_2$ (70:30) at atmospheric pressure. We discuss the implications for future, larger directional neutron and Dark Matter detectors. With an eye to designing and selecting components for these, we generalize our results into analytical expressions for detector performance whenever possible. We conclude by demonstrating the 3-D directional detection of a fast neutron source.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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