Nuclear Experimental Probes of Neutrino Mass

中微子质量核实验探测器

• 批准号: 2209530
• 负责人: Walter Pettus
• 金额: $ 55.39万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2209530&HistoricalAwards=false
• 关键词: Nuclear; Experimental; Probes; Neutrino; Mass

Much remains to be learned about neutrinos despite their great abundance in the universe. Chief among their unknown properties is their mass - a quantity that is relevant to physics at all scales: from the formation of the structure of the cosmos down to the minutest particle nature. Two parallel lines of investigation related to this question are pursued with this award. In the first, a precise measurement the highest-energy decay electrons of tritium beta decay can infer the neutrino mass with no model dependence or theoretical uncertainty. In the second line of investigation, the nature of neutrinos and whether they might uniquely be their own antiparticles will be probed by searching for neutrinoless double beta decay (0νββ). Both experiments are pushing the frontiers of detector technology to achieve their science goals, and graduate students will be supported and trained in these techniques. Additionally, this award will support outreach as the Great American Eclipse of 2024 passes through Bloomington, IN.A next-generation concept for a tritium endpoint neutrino mass experiment is being pursued with Project 8 using the novel Cyclotron Radiation Emission Spectroscopy (CRES) technique. During the award period, work will focus on scalability of CRES towards the required multi-m^3-scale for the ultimate experiment. The research team will lead the experimental controls systems of new demonstrator apparatuses, as well as contribute to other aspects of the project. In 0νββ, this award supports work on the 76Ge experiments, Majorana Demonstrator and LEGEND. Final science results of Majorana are expected early in the award period, with LEGEND-200 commissioning concurrently. The research team will focus on pulse shape analysis towards improved characterization and rejection of backgrounds.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.

尽管中微子在宇宙中数量巨大，但其中最主要的未知特性是它们的质量——这个量与所有尺度的物理学相关：从宇宙结构的形成到最微小的粒子性质。与该问题相关的两条平行研究路线在第一条路线中，精确测量氚β衰变的最高能量衰变电子可以推断出中微子质量，而无需模型依赖或理论上的不确定性。的调查中，中微子的性质以及它们是否可能是唯一的反粒子，将通过寻找中微子双β衰变（0νββ）来探索。这两个实验都在推动探测器技术的前沿，以实现他们的科学目标，并将为研究生提供支持。并接受了这些技术的培训。此外，该奖项还将支持 2024 年美国大日食经过印第安纳州布卢明顿时的推广活动。下一代氚端点中微子概念项目 8 正在利用新型回旋辐射发射光谱 (CRES) 技术进行大规模实验。在资助期间，研究团队将重点关注 CRES 的可扩展性，以实现最终实验所需的多 m^3 规模。将领导新演示设备的实验控制系统，并为 0νββ 项目的其他方面做出贡献，该奖项支持 76Ge 实验、Majorana Demonstrator 和 LEGEND Final 的工作。 Majorana 的科学成果预计将在颁奖初期公布，同时 LEGEND-200 也会投入使用。研究团队将专注于脉冲形状分析，以改善特征描述和背景抑制。该奖项反映了 NSF 的法定使命，并被认为值得通过以下方式获得支持。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。

项目成果

Interpretable boosted-decision-tree analysis for the Majorana Demonstrator

马约拉纳演示器的可解释提升决策树分析

• DOI: 10.1103/physrevc.107.014321
• 发表时间: 2023
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Arnquist, I. J.;Avignone, F. T.;Barabash, A. S.;Barton, C. J.;Bhimani, K. H.;Blalock, E.;Bos, B.;Busch, M.;Buuck, M.;Caldwell, T. S.
• 通讯作者: Caldwell, T. S.

Charge trapping correction and energy performance of the Majorana Demonstrator

马约拉纳演示器的电荷捕获校正和能量性能

• DOI: 10.1103/physrevc.107.045503
• 发表时间: 2023
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Arnquist, I. J.;Avignone, F. T.;Barabash, A. S.;Barton, C. J.;Bhimani, K. H.;Blalock, E.;Bos, B.;Busch, M.;Buuck, M.;Caldwell, T. S.
• 通讯作者: Caldwell, T. S.

Search for Spontaneous Radiation from Wave Function Collapse in the MAJORANA DEMONSTRATOR

• DOI: 10.1103/physrevlett.129.080401
• 发表时间: 2022-08-16
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Arnquist, I. J.;Avignone, F. T., III;Zhu, B. X.
• 通讯作者: Zhu, B. X.

SYNCA: A Synthetic Cyclotron Antenna for the Project 8 Collaboration

SYNCA：用于 Project 8 合作的合成回旋天线

• DOI: 10.1088/1748-0221/18/01/p01034
• 发表时间: 2023
• 期刊: Journal of Instrumentation
• 影响因子: 1.3
• 作者: Ashtari Esfahani, A.;Böser, S.;Buzinsky, N.;Carmona-Benitez, M.C.;Claessens, C.;de Viveiros, L.;Fertl, M.;Formaggio, J.A.;Gladstone, L.;Grando, M.
• 通讯作者: Grando, M.