Collaborative Research: Combating Cosmogenic Argon Isotopes in LEGEND

合作研究:对抗《LEGEND》中的宇宙成因氩同位素

基本信息

  • 批准号:
    2111176
  • 负责人:
  • 金额:
    $ 51万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2021
  • 资助国家:
    美国
  • 起止时间:
    2021-09-01 至 2024-08-31
  • 项目状态:
    已结题

项目摘要

Neutrinos are electrically neutral and have non-zero mass, although their mass is very small. These properties raise the possibility that neutrinos are their own antiparticles (i.e. Majorana particles). If a neutrino is, indeed, its own anti-particle then this would shed light on the reason why matter dominates over antimatter in our universe and would point to new physics at energies far beyond those of our largest collider-accelerators. If neutrinos are Majorana particles, then double-beta decay without the simultaneous emission of neutrinos, or zero-neutrino double-beta decay (0νββ), becomes possible. The PI will search for 0νββ in an upcoming experiment. The ultra-rare nature of the decay, and the extreme sensitivity sought by the experiment, require backgrounds to be strictly controlled. For example, the experiment must be constructed with ultra-pure materials, be deployed underground, and make use of advanced techniques to discriminate signal from background.The LEGEND experiment will use germanium detectors enriched in the isotope Ge-76 to conduct a search for 0νββ. LEGEND hopes to achieve 10 ton-years of exposure with backgrounds reduced by over an order-of-magnitude compared to what has been previously demonstrated. This project aims to address the leading background contribution to the LEGEND experiment. For example, the presence of trace amounts of radioactive Ar-42 in the liquid argon bath in which LEGEND’s Ge detectors will operate will interfere with the counting of real 0νββ events. The PI will perform measurements in liquid argon in order to develop tools to accurately estimate the impact of this source of background and also develop analysis tools to remove it from the data. The PI also aims to develop a robust and validated background model that can be integrated into the LEGEND data processing framework. The goal is to produce reliable energy spectra which can be used for background estimation and fitting, and accurately model pulse shape discrimination techniques which can be used to suppress backgrounds arising from Ar-42.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.
中微子是电中性的,质量不为零,尽管它们的质量非常小。这些性质增加了中微子是它们自己的反粒子(即马约拉纳粒子)的可能性。如果中微子确实是它自己的反粒子,那么这将揭示为什么在我们的宇宙中物质比反物质占主导地位,并将指向能量远远超过我们最大的对撞机加速器的新物理学。如果中微子是马约拉纳粒子,那么没有中微子同时发射的双β衰变或零中微子双β衰变(0νββ)就成为可能。PI将在即将到来的实验中搜索0νββ。衰变的超稀有性质,以及实验所追求的极端灵敏度,要求严格控制背景。例如,实验必须使用超纯材料建造,部署在地下,并利用先进的技术来区分信号和背景,LEGEND实验将使用富含同位素Ge-76的锗探测器来进行0νββ的搜索。LEGEND希望达到10吨年的暴露量,与以前证明的相比,背景减少了一个数量级。该项目旨在解决LEGEND实验的主要背景贡献。例如,LEGEND的Ge探测器将在液态氩浴中工作,液态氩浴中存在微量的放射性Ar-42将干扰真实的0νββ事件的计数。PI将在液态氩中进行测量,以开发工具来准确估计该背景源的影响,并开发分析工具来将其从数据中删除。PI还旨在开发一个强大且经过验证的背景模型,该模型可以集成到LEGEND数据处理框架中。其目标是产生可靠的能谱,可用于背景估计和拟合,并准确地模拟脉冲形状鉴别技术,可用于抑制Ar-42产生的背景。该奖项反映了NSF的法定使命,并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

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Matthew Green其他文献

What drives human–carnivore conflict in the North West Province of South Africa?
是什么导致了南非西北省的人类与肉食动物冲突?
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Thorn;Matthew Green;F. Dalerum;P. Bateman;D. Scott
  • 通讯作者:
    D. Scott
Consumers Buy Lower-Cost Plans On Covered California, Suggesting Exposure To Premium Increases Is Less Than Commonly Reported.
消费者在加州范围内购买低成本保险,这表明保费上涨的风险低于普遍报道的水平。
  • DOI:
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    9.7
  • 作者:
    J. Gabel;Daniel R. Arnold;Brent D. Fulton;Sam T Stromberg;Matthew Green;H. Whitmore;R. Scheffler
  • 通讯作者:
    R. Scheffler
Familial breast cancer services– what are we currently doing in the West Midlands?
  • DOI:
    10.1016/j.ejso.2018.02.125
  • 发表时间:
    2018-06-01
  • 期刊:
  • 影响因子:
  • 作者:
    Salena Bains;Matthew Green;Soni Soumian;Fiona Hoar;Mike Hallissey;Naren Basu
  • 通讯作者:
    Naren Basu
Time to change direction in training load monitoring in elite football? The application of MEMS accelerometers for the evaluation of movement requirements
是时候改变精英足球训练负荷监控的方向了吗?
  • DOI:
    10.1080/24733938.2022.2053337
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    3.4
  • 作者:
    Matthew Green;Patrick Ward;M. Bickley;M. Gillett;Andy O’Boyle;B. Drust
  • 通讯作者:
    B. Drust
Napster Opens Pandora's Box: Examining How File-Sharing Services Threaten the Enforcement of Copyright on the Internet

Matthew Green的其他文献

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{{ truncateString('Matthew Green', 18)}}的其他基金

CAREER: Using electrostatic interactions to guide microstructure and mechanical properties in block polyelectrolytes
职业:利用静电相互作用指导嵌段聚电解质的微观结构和机械性能
  • 批准号:
    1848454
  • 财政年份:
    2019
  • 资助金额:
    $ 51万
  • 项目类别:
    Continuing Grant
Fouling resistant, freestanding zwitterionic polysulfones for osmotically driven membrane processes
用于渗透驱动膜工艺的防垢、独立式两性离子聚砜
  • 批准号:
    1836719
  • 财政年份:
    2018
  • 资助金额:
    $ 51万
  • 项目类别:
    Standard Grant
Neutrinoless Double-Beta Decay with Germanium Detectors: Majorana Demonstrator and LEGEND
使用锗探测器的无中微子双贝塔衰变:马约拉纳演示器和传奇
  • 批准号:
    1812409
  • 财政年份:
    2018
  • 资助金额:
    $ 51万
  • 项目类别:
    Continuing Grant
SaTC: CORE: Medium: Collaborative: Theory and Practice of Cryptosystems Secure Against Subversion
SaTC:核心:媒介:协作:密码系统安全防范颠覆的理论与实践
  • 批准号:
    1801479
  • 财政年份:
    2018
  • 资助金额:
    $ 51万
  • 项目类别:
    Continuing Grant
CAREER: Towards Secure and Policy-Compliant Encrypted Communications
职业:实现安全且符合策略的加密通信
  • 批准号:
    1653110
  • 财政年份:
    2017
  • 资助金额:
    $ 51万
  • 项目类别:
    Continuing Grant
NSF Postdoctoral Fellowship in Biology FY 2013
2013 财年 NSF 生物学博士后奖学金
  • 批准号:
    1306695
  • 财政年份:
    2013
  • 资助金额:
    $ 51万
  • 项目类别:
    Fellowship Award
Collaborative Research: Enabling Instructors to Teach Statics Actively
协作研究:使教师能够积极教授静力学
  • 批准号:
    1129341
  • 财政年份:
    2011
  • 资助金额:
    $ 51万
  • 项目类别:
    Standard Grant
SBIR Phase I: Commutational Ramp Load Disk Drive Actuator
SBIR 第一阶段:换向斜坡负载磁盘驱动执行器
  • 批准号:
    0945905
  • 财政年份:
    2010
  • 资助金额:
    $ 51万
  • 项目类别:
    Standard Grant

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