DarkSide-20k: A 20 tonne two-phase LAr TPC for direct dark matter detection at LNGS
文献类型：期刊论文
| 作者 | DarkSide Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL PLUS
 |
| 出版日期 | 2018 |
| 卷号 | 133期号:3页码:131 |
| ISSN号 | 2190-5444 |
| DOI | 10.1140/epjp/i2018-11973-4 |
| 文献子类 | Article |
| 英文摘要 | Building on the successful experience in operating the DarkSide-50 detector, the DarkSide Collaboration is going to construct DarkSide-20k, a direct WIMP search detector using a two-phase Liquid Argon Time Projection Chamber (LAr TPC) with an active (fiducial) mass of 23t (20t). This paper describes a preliminary design for the experiment, in which the DarkSide-20k LAr TPC is deployed within a shield/veto with a spherical Liquid Scintillator Veto (LSV) inside a cylindrical Water Cherenkov Veto (WCV). This preliminary design provides a baseline for the experiment to achieve its physics goals, while further development work will lead to the final optimization of the detector parameters and an eventual technical design. Operation of DarkSide-50 demonstrated a major reduction in the dominant Ar-39 background when using argon extracted from an underground source, before applying pulse shape analysis. Data from DarkSide-50, in combination with MC simulation and analytical modeling, shows that a rejection factor for discrimination between electron and nuclear recoils of > 3 x 10(9) is achievable. This, along with the use of the veto system and utilizing silicon photomultipliers in the LAr TPC, are the keys to unlocking the path to large LAr TPC detector masses, while maintaining an experiment in which less than < 0.1 events (other than v-induced nuclear recoils) is expected to occur within the WIMP search region during the planned exposure. DarkSide-20k will have ultra-low backgrounds than can be measured in situ, giving sensitivity to WIMP-nucleon cross sections of 1.2 x 10(-47) cm(2) (1.1 x 10(-46) cm(2)) for WIMPs of 1 TeV/c(2) (10 TeV/c(2)) mass, to be achieved during a 5yr run producing an exposure of 100 t yr free from any instrumental background. |
| WOS关键词 | INTERACTING MASSIVE PARTICLES ; SOLAR-NEUTRINO EXPERIMENT ; DEL GRAN SASSO ; LIQUID-ARGON ; VAPOR-PRESSURE ; SCINTILLATION EFFICIENCY ; THERMODYNAMIC PROPERTIES ; ISOTOPIC LIQUIDS ; SEARCH ; BOREXINO |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000434467800001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285987]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | DarkSide Collaboration. DarkSide-20k: A 20 tonne two-phase LAr TPC for direct dark matter detection at LNGS[J]. EUROPEAN PHYSICAL JOURNAL PLUS,2018,133(3):131. |
| APA | DarkSide Collaboration.(2018).DarkSide-20k: A 20 tonne two-phase LAr TPC for direct dark matter detection at LNGS.EUROPEAN PHYSICAL JOURNAL PLUS,133(3),131. |
| MLA | DarkSide Collaboration."DarkSide-20k: A 20 tonne two-phase LAr TPC for direct dark matter detection at LNGS".EUROPEAN PHYSICAL JOURNAL PLUS 133.3(2018):131. |
入库方式： OAI收割
来源：高能物理研究所
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