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arXiv 1707.08145physics.ins-det
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DarkSide-20k:20吨级两相LAr TPC用于LNGS的直接暗物质探测

DarkSide-20k: A 20 Tonne Two-Phase LAr TPC for Direct Dark Matter Detection at LNGS

C. E. Aalseth, F. Acerbi, P. Agnes, I. F. M. Albuquerque, T. Alexander, A. Alici, A. K. Alton, P. Antonioli, S. Arcelli, R. Ardito, I. J. Arnquist, D. M. Asner,… 展开作者

C. E. Aalseth, F. Acerbi, P. Agnes, I. F. M. Albuquerque, T. Alexander, A. Alici, A. K. Alton, P. Antonioli, S. Arcelli, R. Ardito, I. J. Arnquist, D. M. Asner, M. Ave, H. O. Back, A. I. Barrado Olmedo, G. Batignani, E. Bertoldo, S. Bettarini, M. G. Bisogni, V. Bocci, A. Bondar, G. Bonfini, W. Bonivento, M. Bossa, B. Bottino, M. Boulay, R. Bunker, S. Bussino, A. Buzulutskov, M. Cadeddu, M. Cadoni, A. Caminata, N. Canci, A. Candela, C. Cantini, M. Caravati, M. Cariello, M. Carlini, M. Carpinelli, A. Castellani, S. Catalanotti, V. Cataudella, P. Cavalcante, S. Cavuoti, R. Cereseto, A. Chepurnov, C. Cicalò, L. Cifarelli, M. Citterio, A. G. Cocco, M. Colocci, S. Corgiolu, G. Covone, P. Crivelli, I. D'Antone, M. D'Incecco, D. D'Urso, M. D. Da Rocha Rolo, M. Daniel, S. Davini, A. de Candia, S. De Cecco, M. De Deo, G. De Filippis, G. De Guido, G. De Rosa, G. Dellacasa, M. Della Valle, P. Demontis, A. Derbin, A. Devoto, F. Di Eusanio, G. Di Pietro, C. Dionisi, A. Dolgov, I. Dormia, S. Dussoni, A. Empl, M. Fernandez Diaz, A. Ferri, C. Filip, G. Fiorillo, K. Fomenko, D. Franco, G. E. Froudakis, F. Gabriele, A. Gabrieli, C. Galbiati, P. Garcia Abia, A. Gendotti, A. Ghisi, S. Giagu, P. Giampa, G. Gibertoni, C. Giganti, M. A. Giorgi, G. K. Giovanetti, M. L. Gligan, A. Gola, O. Gorchakov, A. M. Goretti, F. Granato, M. Grassi, J. W. Grate, G. Y. Grigoriev, M. Gromov, M. Guan, M. B. B. Guerra, M. Guerzoni, M. Gulino, R. K. Haaland, A. Hallin, B. Harrop, E. W. Hoppe, S. Horikawa, B. Hosseini, D. Hughes, P. Humble, E. V. Hungerford, An. Ianni, C. Jillings, T. N. Johnson, K. Keeter, C. L. Kendziora, S. Kim, G. Koh, D. Korablev, G. Korga, A. Kubankin, M. Kuss, M. Kuźniak, B. Lehnert, X. Li, M. Lissia, G. U. Lodi, B. Loer, G. Longo, P. Loverre, R. Lussana, L. Luzzi, Y. Ma, A. A. Machado, I. N. Machulin, A. Mandarano, L. Mapelli, M. Marcante, A. Margotti, S. M. Mari, M. Mariani, J. Maricic, C. J. Martoff, M. Mascia, M. Mayer, A. B. McDonald, A. Messina, P. D. Meyers, R. Milincic, A. Moggi, S. Moioli, J. Monroe, A. Monte, M. Morrocchi, B. J. Mount, W. Mu, V. N. Muratova, S. Murphy, P. Musico, R. Nania, A. Navrer Agasson, I. Nikulin, V. Nosov, A. O. Nozdrina, N. N. Nurakhov, A. Oleinik, V. Oleynikov, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, S. Palmas, L. Pandola, E. Pantic, E. Paoloni, G. Paternoster, V. Pavletcov, F. Pazzona, S. Peeters, K. Pelczar, L. A. Pellegrini, N. Pelliccia, F. Perotti, R. Perruzza, V. Pesudo Fortes, C. Piemonte, F. Pilo, A. Pocar, T. Pollmann, D. Portaluppi, D. A. Pugachev, H. Qian, B. Radics, F. Raffaelli, F. Ragusa, M. Razeti, A. Razeto, V. Regazzoni, C. Regenfus, B. Reinhold, A. L. Renshaw, M. Rescigno, F. Retière, Q. Riffard, A. Rivetti, S. Rizzardini, A. Romani, L. Romero, B. Rossi, N. Rossi, A. Rubbia, D. Sablone, P. Salatino, O. Samoylov, E. Sánchez García, W. Sands, M. Sant, R. Santorelli, C. Savarese, E. Scapparone, B. Schlitzer, G. Scioli, E. Segreto, A. Seifert, D. A. Semenov, A. Shchagin, L. Shekhtman, E. Shemyakina, A. Sheshukov, M. Simeone, P. N. Singh, P. Skensved, M. D. Skorokhvatov, O. Smirnov, G. Sobrero, A. Sokolov, A. Sotnikov, F. Speziale, R. Stainforth, C. Stanford, G. B. Suffritti, Y. Suvorov, R. Tartaglia, G. Testera, A. Tonazzo, A. Tosi, P. Trinchese, E. V. Unzhakov, A. Vacca, E. Vázquez-Jáuregui, M. Verducci, T. Viant, F. Villa, A. Vishneva, B. Vogelaar, M. Wada, J. Wahl, J. Walding, S. Walker, H. Wang, Y. Wang, A. W. Watson, S. Westerdale, R. Williams, M. M. Wojcik, S. Wu, X. Xiang, X. Xiao, C. Yang, Z. Ye, A. Yllera de Llano, F. Zappa, G. Zappalà, C. Zhu, A. Zichichi, M. Zullo, A. Zullo

摘要:

在操作DarkSide-50探测器的成功经验的基础上,DarkSide合作组织将建造DarkSide-20 k,这是一种直接WIMP搜索探测器,使用两相液体氩时间投影室(LArTPC),有效(基准)质量为23 t(20 t)。DarkSide-20 k LArTPC将被部署在一个护盾/否决器内,在圆柱形的水切伦科夫否决器(WCV)内有一个球形的液体闪烁器否决器(LSV)。DarkSide-50的运行表明,在应用脉冲形状分析之前,当使用从地下源提取的氩时,占主导地位的$^{39}$ Ar背景显著降低。从DarkSide-50的数据,与MC模拟和分析建模相结合,显示了一个拒绝因子之间的歧视$\gt3\times10^9$的电子和核反冲是可以实现的。这与否决系统的使用一起,是解锁大LArTPC探测器质量的关键,同时保持“无仪器背景”实验,在计划曝光期间,在WIMP搜索区域内预计发生不到0.1个事件(PDMATHAMO引起的核反冲除外)的实验。DarkSide-20 k将具有比原位测量的超低背景。对于$1$ TeV $/c^2$($10$ TeV $/c^2$)质量的WIMP,这将给出$1.2\times10^{-47}$ cm $^2$($1.1\times10^{-46}$ cm $^2$)的WIMP-核子截面的灵敏度,在5年运行期间产生100 t/年的无任何仪器背景的曝光。DarkSide-20 k可以将其运行时间延长至10年,将暴露量增加至200吨/年,对$1$ TeV $/c^2$($10$ TeV $/c^2$)质量的WIMP的灵敏度达到$7.4\times10^{-48}$ cm $^2$($6.9\times10^{-47}$ cm $^2$)。

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 (LArTPC) with an active (fiducial) mass of 23 t (20 t). The DarkSide-20k LArTPC will be deployed within a shield/veto with a spherical Liquid Scintillator Veto (LSV) inside a cylindrical Water Cherenkov Veto (WCV). Operation of DarkSide-50 demonstrated a major reduction in the dominant $^{39}$Ar 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 $\gt3\times10^9$ is achievable. This, along with the use of the veto system, is the key to unlocking the path to large LArTPC detector masses, while maintaining an "instrumental background-free" experiment, an experiment in which less than 0.1 events (other than $ν$-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. This will give sensitivity to WIMP-nucleon cross sections of $1.2\times10^{-47}$ cm$^2$ ($1.1\times10^{-46}$ cm$^2$) for WIMPs of $1$ TeV$/c^2$ ($10$ TeV$/c^2$) mass, to be achieved during a 5 yr run producing an exposure of 100 t yr free from any instrumental background. DarkSide-20k could then extend its operation to a decade, increasing the exposure to 200 t yr, reaching a sensitivity of $7.4\times10^{-48}$ cm$^2$ ($6.9\times10^{-47}$ cm$^2$) for WIMPs of $1$ TeV$/c^2$ ($10$ TeV$/c^2$) mass.

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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