Polarized ultra-cold neutrons in the next generation measurement of the neutron EDM

下一代中子 EDM 测量中的极化超冷中子

• 批准号: 237295021
• 负责人: Professor Dr. Peter Fierlinger, since 4/2016
• 金额: --
• 依托单位: Arbeitsgruppe Hadronenstruktur und Fundamentale Symmetrien
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/237295021?language=en
• 关键词: Polarized; ultra; cold; neutrons; next

The actual accuracy in the search for a non zero electric dipole moment of the free neutron reached a limit of the order of 10-26 ecm. Similar to past experiments, all new upcoming experiments are looking for a change in the neutron spin direction after the storage and precession of polarized ultracold neutrons under certain magnetic and electric field conditions. Therefore, in order to increase the sensitivity, the next generation nEDM experiment at the FRMII requires improvements in each of its subparts, which will come close to the limit of feasibility. The three final goals of the proposed project will be the delivery of 100% polarized of ultracold neutrons into the nEDM precession chambers, the analysis of the neutron spin after a defined precession time and the implementation of a unique tool to investigate geometric phase effects beyond the level of 10-27ecm.

寻找自由中子非零电偶极矩的实际精度达到了10-26 ecm量级的极限。与过去的实验类似，所有即将进行的新实验都在寻找极化超冷中子在一定磁场和电场条件下存储和进动后中子自旋方向的变化。因此，为了提高灵敏度，FRMII的下一代nEDM实验需要对其每个子部分进行改进，这将接近可行性的极限。拟议项目的三个最终目标是将 100% 极化的超冷中子输送到 nEDM 进动室中，在定义的进动时间后分析中子自旋，以及实施一种独特的工具来研究超出进动时间的几何相位效应。 10-27ecm 的水平。