Performance of phase II of the project: Construction and performance of an experiment to determine a possible electric charge of the free neutron with a sensitivity of gamma qn = 10-22qe.

项目第二阶段的执行：构建并执行一个实验，以确定灵敏度为 gamma qn = 10-22qe 的自由中子可能的电荷。

• 批准号: 167645125
• 负责人: Professor Dr. Tobias Reich, since 4/2014
• 金额: --
• 依托单位: Department Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/167645125?language=en
• 关键词: Performance; phase; II; project; Construction

The investigation of the fundamental properties of the neutron is closely related to astroparticle physics. Besides the search for an electric dipole moment of the neutron and the precise determination of its life time, the question of its electric neutrality is of certain interest. This is related to the quantization of the electric charge. Being an empirical well-established finding, it cannot be derived however straightforward from the theoretical structure of the Standard Model. A dequantization of the electric charge could result in so-called ’rest-charges’ of the known particles like the neutron. Our project aims to measure the neutron charge with a precision of δqn= 10-22qe and with ultracold neutrons. Since April 2008 we carried out preliminary work and investigated systematic effects which concern such an experiment. In the second phase we will realize the high voltage system, define the further used materials and fix the mechanical setup. The milestones should be reached during 2 years of development after which we will begin with the construction of the experiment itself.

中子基本性质的研究与天体粒子物理学密切相关。除了寻找中子的电偶极矩和精确测定中子的寿命之外，中子的电中性问题也引起了人们的兴趣。这与电荷的量子化有关。作为一个已得到证实的经验发现，无论多么简单，它都不能从标准模型的理论结构中得出。电荷的反量子化可能会导致中子等已知粒子产生所谓的“静止电荷”。我们的项目旨在以 δqn= 10-22qe 的精度和超冷中子测量中子电荷。自2008年4月以来，我们开展了前期工作并调查了与此类实验相关的系统效果。在第二阶段，我们将实现高压系统，定义进一步使用的材料并修复机械设置。这些里程碑应该在两年的开发过程中达到，之后我们将开始构建实验本身。