RII Track-4: Liquid Xenon Time Projection Chamber R&D on the Large Xenon Test Stand at LLNL

RII Track-4：液氙时间投影室 R

• 批准号: 1833095
• 负责人: Ryan MacLellan
• 金额: $ 18.47万
• 依托单位: University of South Dakota Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1833095&HistoricalAwards=false
• 关键词: RII; Track; Liquid; Xenon; Time

Non-technical DescriptionThe only known neutral fundamental particles, that also have mass, are neutrinos. This makes them the only candidates to be their own antiparticle. If the neutrino is its own antiparticle, we could resolve some outstanding curiosities, not the least of which being: "Why is the Universe made up of matter and not roughly equal amounts of matter and antimatter?" This fellowship will initiate a long-term collaboration between the University of South Dakota (USD) and the Lawrence Livermore National Laboratory (LLNL) that will perform research and development of liquid xenon detector technologies for the next generation of rare decay searches. This fellowship will provide the PI and USD graduate students with the opportunity to experiment with state of the art detector technologies that could one day be deployed in South Dakota in a next-generation multi-tonne-scale liquid xenon dark matter or neutrinoless double-beta decay search. Observation of the latter is the only feasible way to determine that the neutrino is, in fact, its own antiparticle. Both USD and LLNL are members of the much broader nEXO Collaboration that is working towards a proposal to build such an experiment deep underground, such as in the Sanford Underground Research Facility in South Dakota.Technical DescriptionLarge, monolithic liquid xenon time-projection chambers have been demonstrated to be among the most powerful tools for low-background rare-event searches. In particular, the direct dark matter search community has embraced them as the leaders of the next generation program that is beginning to take shape. EXO-200 has also demonstrated the potential for such a detector to meet the next generation target for a tonne-scale neutrinoless double-beta decay search. The goal of this fellowship will be to initiate a long-term collaboration between the University of South Dakota (USD) and the Lawrence Livermore National Laboratory (LLNL). This collaboration will leverage the large xenon test facility at LLNL to perform R&D towards a (five) tonne scale liquid-xenon time-projection chamber to eventually search for the neutrinoless double-beta decay of Xe-136 with the nEXO experiment. The primary objective of the LLNL test facility, once we finish construction and commissioning, will be to qualify the electric field for the full diameter of nEXO. However, it can house many of the novel detector systems being prototyped for nEXO including novel charge readout tiles and custom silicon photomultipliers. The test facility will also be used to prototype external xenon handling systems. Immersing the PI in this R&D nexus for nEXO will ensure that the PI will have the expertise to contribute to the ongoing success of the nEXO experiment.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述也有质量的唯一已知的中性基本颗粒是中微子。这使他们成为唯一成为自己的反颗粒的候选人。如果中微子是其自身的反粒子，我们可以解决一些出色的好奇心，其中最重要的是：“为什么宇宙由物质组成而不是大致相等的物质和反物质？”这项奖学金将启动南达科他大学（USD）与劳伦斯·利弗莫尔国家实验室（LLNL）之间的长期合作，该公司将对下一代罕见的衰败搜索进行液体Xenon探测器技术的研究和开发。该奖学金将使PI和美元的研究生有机会尝试在下一代多吨位液体液体XENON暗物质或中微子Double-Netbeta Double-beta衰减搜索中，有一天可以在南达科他州部署的最先进的探测器技术。对后者的观察是确定中微子实际上是其自身的反粒子的唯一可行方法。 USD和LLNL都是更广泛的Nexo合作的成员，该合作正在努力建立这样的实验，例如在南达科他州的Sanford Underground地下研究机构中。特别是，直接的暗物质搜索社区将它们作为开始形成的下一代计划的领导者。 exo-200还表明了这种检测器有可能达到下一代中微子双β衰变搜索的下一代目标。 该奖学金的目标是开始南达科他大学（USD）和劳伦斯·利弗莫尔国家实验室（LLNL）之间的长期合作。这种合作将利用LLNL的大型氙气测试设施进行研发，以通过Nexo实验进行（五吨量表液体 - Xenon液化时间预测室）最终搜索XE-136的中性链脱甲氧肌衰减。 LLNL测试设施的主要目的是我们完成建筑和调试后，将使电场有资格获得Nexo的整个直径。但是，它可以容纳许多用于Nexo的新型探测器系统，包括新型的电荷读数瓷砖和自定义的硅光电倍增体。测试设施还将用于原型外部氙处理系统。将PI浸入Nexo的R＆D Nexus中，将确保PI具有专业知识，可以为Nexo实验的持续成功做出贡献。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。

项目成果

Characterization of the Hamamatsu VUV4 MPPCs for nEXO

• DOI: 10.1016/j.nima.2019.05.096
• 发表时间: 2019-10-01
• 期刊: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
• 影响因子: 1.4
• 作者: Gallina, G.;Giampa, P.;Ziegler, T.
• 通讯作者: Ziegler, T.

Simulation of charge readout with segmented tiles in nEXO

• DOI: 10.1088/1748-0221/14/09/p09020
• 发表时间: 2019-07
• 期刊: Journal of Instrumentation
• 影响因子: 1.3
• 作者: Z. Li;W. Cen;A. Robinson;D. Moore;L. Wen;A. Odian;S. A. Kharusi;G. Anton;I. Arnquist;I. Badhrees;P. Barbeau;D. Beck;V. Belov;T. Bhatta;J. Brodsky;E. Brown;T. Brunner;E. Caden;G. Cao;L. Cao;C. Chambers;B. Chana;S. Charlebois;M. Chiu;B. Cleveland;M. Coon;A. Craycraft;J. Dalmasson;T. Daniels;L. Darroch;S. Daugherty;A. D. S. Croix;A. D. Mesrobian-Kabakian;R. DeVoe;M. Vacri;J. Dilling;Y. Ding;M. Dolinski;A. Dragone;J. Echevers;M. Elbeltagi;L. Fabris;D. Fairbank;W. Fairbank;J. Farine;S. Ferrara;S. Feyzbakhsh;R. Fontaine;A. Fucarino;G. Gallina;P. Gautam;G. Giacomini;D. Goeldi;R. Gornea;G. Gratta;E. Hansen;M. Heffner;E. Hoppe;J. Hössl;A. House;M. Hughes;A. Iverson;A. Jamil;M. Jewell;X. Jiang;A. Karelin;L. Kaufman;D. Kodroff;T. Koffas;R. Krücken;A. Kuchenkov;K. S. Kumar;Y. Lan;A. Larson;K. Leach;B. Lenardo;D. Leonard;G. Li;S. Li;C. Licciardi;Yuehe Lin;P. Lv;R. Maclellan;T. McElroy;M. Medina-Peregrina;T. Michel;B. Mong;K. Murray;P. Nakarmi;C. Natzke;R. J. Newby;Z. Ning;O. Njoya;F. Nolet;O. Nusair;K. Odgers;M. Oriunno;J. Orrell;G. S. Ortega;I. Ostrovskiy;C. Overman;S. Parent;A. Piepke;A. Pocar;J. Pratte;V. Radeka;E. Raguzin;S. Rescia;F. Retière;M. Richman;T. Rossignol;P. Rowson;N. Roy;J. Runge;R. Saldanha;S. Sangiorgio;K. S. Viii;A. Soma;G. St-Hilaire;V. Stekhanov;T. Stiegler;X. Sun;M. Tarka;J. Todd;T. Tolba;T. Totev;R. Tsang;T. Tsang;F. Vachon;V. Veeraraghavan;S. Viel;G. Visser;C. Vivo-Vilches;J. Vuilleumier;M. Wagenpfeil;M. Walent;Q. Wang;Martin Ward;J. Watkins;M. Weber;W. Wei;U. Wichoski;S. Wu;W. Wu;Xiongwei Wu;Q. Xia;H. Yang;Liang Yang;Y. Yen;O. Zeldovich;J. Zhao;Y. Zhou;T. Ziegler