Development of a prototype shield for a new EDM experiment

为新的 EDM 实验开发原型屏蔽

• 批准号: 174298135
• 负责人: Professor Dr. Stephan Paul
• 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: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/174298135?language=en
• 关键词: Development; prototype; shield; new; EDM

In this project we plan to design a passive magnetic shielding for a new neutron EDM experiment. The shielding consists of five layers of mu-metal, for which prototype parts shall be built and characterized. Preparing development and design work is necessary because of the chambers large dimensions (~ 1.5 m x 3.5 m) which impede the scaling of results gained with small samples. Thereby we will test several aspects of the shielding like the mechanical connections or opening mechanisms and how they affect the shielding quality. Tests shall be performed on probes, which will be measured at the PTB Berlin, and on larger prototype parts which should give insight on shielding factors and residual magnetization under realistic conditions. In order to perform those tests, measurement setups will have to be adapted to existing infrastructure at the PTB Berlin. Simulations and calculations of this extreme case where thin mu-metal layers with high permeability interact with magnetic fields will be performed with different software tools and will be compared with measurements of coils (Excellence Cluster) and mu-metall (TUM, PTB).

在这个项目中，我们计划为一个新的中子电火花加工实验设计一种被动磁屏蔽。屏蔽层由五层金属组成，应为其建造原型部件并进行表征。准备开发和设计工作是必要的，因为腔室的尺寸很大(~1.5m x 3.5m)，这阻碍了用小样本获得的结果的缩放。因此，我们将测试屏蔽的几个方面，如机械连接或打开机制，以及它们如何影响屏蔽质量。应对将在柏林PTB测量的探头和更大的原型部件进行测试，这些部件应能深入了解实际条件下的屏蔽因素和剩余磁化。为了进行这些测试，测量装置必须适应柏林PTB现有的基础设施。我们将使用不同的软件工具对这种具有高磁导率的金属薄层与磁场相互作用的极端情况进行模拟和计算，并将其与线圈(卓越集团)和金属金属(TUM，PTB)的测量结果进行比较。