Surrogate Based Automated Tuning of Microwave Devices and Systems

基于代理的微波设备和系统自动调谐

• 批准号: DDG-2018-00001
• 负责人: Laforge, Paul
• 金额: $ 1.09万
• 依托单位: University of Regina
• 依托单位国家: 加拿大
• 项目类别: Discovery Development Grant
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=656344
• 关键词: Surrogate; Based; Automated; Tuning; Microwave

The matter-antimatter asymmetry in the universe is one of the biggest questions in fundamental physics, as well as philosophy. The neutron electric dipole moment (nEDM) is related to this asymmetry and can thus help shed light on this unsolved puzzle. Experiments searching for the nEDM have also ruled out several particle physics theories over the last five decades. So far, the most stringent limits on the nEDM have been set by experiments using ultracold neutrons; these are so slow that they are reflected by certain wall materials and can subsequently be stored and observed for hundreds of seconds.***TRIUMF's Ultracold Neutron program aims at providing the world's highest intensity of ultracold neutrons (UCN) to experiments. Furthermore, the Canadian-Japanese collaboration behind the TRIUMF UCN project wants to achieve a world leading ultimate sensitivity of 10−27 ecm to the nEDM. This search constitutes the flagship experiment of UCN physics.******The research program suggested in this proposal extends over two years and is intended as bridging grant for a new collaboration member. The rest of the UCN collaboration is supported by NSERC grant SAPPJ-2016-00024. The co-applicant is the principal applicant of this existing grant and is signing this application for administrative purposes only.***The main goal of this research proposal is the successful integration of the nEDM apparatus into the TRIUMF UCN facility. Two milestones are (i) filling and storing UCN into the existing Phase 1 nEDM apparatus, and (ii) the observation of Larmor precession of the stored UCN. This is very challenging due to the harsh environmental conditions in the direct proximity of the cyclotron accelerator which include (among others) high magnetic background fields, as well as time varying magnetic fields caused by other close-by experiments and infrastructure such as cranes and loading doors. The stability and homogeneity of the magnetic field, however, are crucial ingredients to the feasibility of Larmor precession experiments, and subsequently to the sensitivity of an nEDM measurement.***The applicant has gathered ample expertise in magnetic field observation and manipulation, as well as with nEDM measurements during her PhD studies and additionally is very experienced with UCN experiments by participating in UCN measurement campaigns at the institutes FRM-II in Germany, ILL in France, and PSI in Switzerland through her entire scientific career. This will be essential to the success of the UCN source and EDM experiment at TRIUMF.**

宇宙中的物质与反物质的不对称性是基础物理学和哲学中最大的问题之一，中子电偶极矩（nEDM）与这种不对称性有关，因此可以帮助揭示这一未解之谜的实验。在过去的五年中，nEDM 还排除了一些粒子物理理论，到目前为止，nEDM 的最严格限制是通过使用超冷中子的实验设定的，这些限制非常慢，以至于它们被反映了。某些壁材料，随后可以存储和观察数百秒。***TRIUMF 的超冷中子计划旨在为实验提供世界上最高强度的超冷中子 (UCN)。此外，TRIUMF UCN 项目背后的加拿大和日本合作希望对 nEDM 实现世界领先的 10−27 ecm 终极灵敏度。这项研究构成了 UCN 物理学的旗舰实验。****** 本提案中建议的研究计划持续了两年多的时间。旨在作为新合作成员的过渡补助金。 UCN 合作的其余部分由 NSERC 补助金 SAPPJ-2016-00024 支持。共同申请人是该现有补助金的主要申请人，签署此申请仅用于管理目的。 ***本研究计划的主要目标是将 nEDM 设备成功集成到 TRIUMF UCN 设施中，两个里程碑是 (i) 将 UCN 填充和存储到现有的一期 nEDM 设备中，以及(ii) 观测存储 UCN 的拉莫尔进动，这是非常具有挑战性的，因为回旋加速器直接附近的恶劣环境条件包括（除其他外）高背景磁场以及随时间变化的磁场。然而，磁场的稳定性和均匀性是拉莫尔进动实验可行性以及随后的 nEDM 测量灵敏度的关键因素。***申请人有在攻读博士学位期间，她在磁场观测和操作以及 nEDM 测量方面积累了丰富的专业知识，此外，通过参加德国 FRM-II 研究所、法国 ILL 和美国 PSI 研究所的 UCN 测量活动，在 UCN 实验方面拥有丰富的经验。瑞士在她的整个科学生涯中，这对于 TRIUMF 的 UCN 源和 EDM 实验的成功至关重要。**