ALPS II: Commissioning and Data Taking

ALPS II：调试和数据采集

• 批准号: 2110705
• 负责人: David Tanner
• 金额: $ 50万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard 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
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2110705&HistoricalAwards=false
• 关键词: ALPS; II; Commissioning; Data; Taking

Astronomical observations have established that the Universe is largely dark, with approximately 85% of the matter made of yet unknown particles. Determining the nature of this dark matter will impact our fundamental knowledge of cosmology, astrophysics and particle physics and is the basis for one of the most extensive searches for new physics beyond the Standard Model that has been so effective in describing our understanding to date. Extensions of the Standard Model predict weakly interacting light (sub-electronvolt) particles, including axions, which have been introduced as a primary candidate for the dark matter. The Any Light Particle Search (ALPS) II experiment is designed to provide the highest search sensitivity for these low-mass particles of any measurements to date that use the Light Shining Through a Wall (LSW) technique. Located at DESY in Hamburg, Germany, the ALPS II detector is now under construction and this award supports the ALPS II group at the University of Florida to perform the upcoming commissioning and science runs using the heterodyne detection scheme developed by the team. The experiment provides a unique and diverse training ground for postdoctoral and student researchers to develop skills in electronics and feedback control systems, vacuum and cryogenics, computational methods and data analysis algorithms, large-scale detector commission and operation, and dark matter physics and cosmology. The ALPS experiment is designed to search for interactions that turn photons into low-mass particles and vice versa, allowing photons to reemerge behind an otherwise light tight wall. These low-mass particles include axion-like particles, their scalar counterparts, as well as hidden sector photons, and would contribute or even exclusively form the omnipresent dark matter. The ALPS II experiment consists of two 120 m long strings of straightened 5.3 T HERA dipoles on each side of the wall. An optical cavity is used to build up the power to up to 1 MW on one side of the wall while a second cavity amplifies the recreation process on the other side of the wall. In contrast to helioscopes and also haloscopes used also in the search for axion-like particles, ALPS makes no assumptions about stellar evolution; nor does it assume any specific dark matter model. The experiment only depends on proposed fundamental interactions between photons and postulated non-standard-model particles. The ALPS II experiment will surpass past LSW searches by 12 orders of magnitude in regenerated photons and explores a parameter space which has lately been favored by astronomical and other observations.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.

天文观测表明，宇宙大部分是黑暗的，大约 85% 的物质是由未知粒子组成的。 确定这种暗物质的性质将影响我们对宇宙学、天体物理学和粒子物理学的基础知识，并且是超越标准模型的最广泛的新物理学搜索之一的基础，标准模型在描述我们迄今为止的理解方面非常有效。 标准模型的扩展预测弱相互作用的光（亚电子伏）粒子，包括轴子，轴子已被引入作为暗物质的主要候选者。 任意光粒子搜索 (ALPS) II 实验旨在为迄今为止使用穿墙光照射 (LSW) 技术的任何测量提供对这些低质量粒子的最高搜索灵敏度。 位于德国汉堡 DESY 的 ALPS II 探测器目前正在建造中，该奖项支持佛罗里达大学的 ALPS II 小组使用该团队开发的外差探测方案进行即将进行的调试和科学运行。该实验为博士后和学生研究人员提供了一个独特且多样化的训练场地，以培养电子和反馈控制系统、真空和低温学、计算方法和数据分析算法、大规模探测器调试和操作以及暗物质物理学和宇宙学方面的技能。 ALPS 实验旨在寻找将光子转变为低质量粒子的相互作用，反之亦然，从而使光子能够在不透光的墙壁后面重新出现。这些低质量粒子包括轴子状粒子、它们的标量对应物以及隐藏的扇形光子，并且将贡献甚至专门形成无所不在的暗物质。 ALPS II 实验由位于墙两侧的两根 120 m 长的直 5.3 T HERA 偶极子串组成。光腔用于在墙的一侧建立高达 1 MW 的功率，而第二个腔则放大墙另一侧的娱乐过程。 与日光镜和用于寻找类轴子粒子的日光镜不同，ALPS 不对恒星演化做出任何假设；它也没有假设任何特定的暗物质模型。该实验仅依赖于光子和假设的非标准模型粒子之间提出的基本相互作用。 ALPS II 实验将在再生光子方面超越过去的 LSW 搜索 12 个数量级，并探索最近受到天文和其他观测青睐的参数空间。该奖项反映了 NSF 的法定使命，并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，被认为值得支持。

项目成果

Design of the ALPS II optical system

ALPS II光学系统的设计

• DOI: 10.1016/j.dark.2022.100968
• 发表时间: 2022
• 期刊: Physics of the Dark Universe
• 影响因子: 5.5
• 作者: Diaz Ortiz, M.;Gleason, J.;Grote, H.;Hallal, A.;Hartman, M.T.;Hollis, H.;Isleif, K.-S.;James, A.;Karan, K.;Kozlowski, T.
• 通讯作者: Kozlowski, T.

The heterodyne sensing system for the ALPS II search for sub-eV weakly interacting particles

用于 ALPS II 搜索亚电子伏弱相互作用粒子的外差传感系统

• DOI: 10.1016/j.dark.2021.100914
• 发表时间: 2022
• 期刊: Physics of the Dark Universe
• 影响因子: 5.5
• 作者: Hallal, Ayman;Messineo, Giuseppe;Ortiz, Mauricio Diaz;Gleason, Joseph;Hollis, Harold;Tanner, D.B.;Mueller, Guido;Spector, Aaron
• 通讯作者: Spector, Aaron