Entwicklung externer und interner Magnetfelder für ein EDM Experiment

新一代超冷中子源（UCN）的安装，使粒子物理基本实验之一的中子电偶极矩测量（EDM）的极限提高了两个数量级，使dn < 5 · 10~（-28）e ~-。由于现有的实验不仅受统计学的限制，而且还受系统误差的限制，因此必须通过相应的研究来准备新的实验。众所周知[3]，基于磁场的系统效应在计划新实验时起着核心作用。在这个项目中，我们计划实现一个稳定的磁环境，并完成决定性地指导大型被动屏蔽设计的预先研究。

The installation of a new generation of sources for ultracold neutrons (UCN) permits to improve the limits on one of the basic experiments in particle physics, the measurement of the electric dipole moment of the neutron dn [1] (EDM), by two Orders of magnitude to dn < 5 • 10~28 e-, because of increased particle density. Since current experiments are limited not only by statistics but also by systematic errors, new experiments have to be prepared by corresponding studies. It is known [3] that magnetic field based systematic effects play a central role while planning a new experiment. In this project we plan to realize a stable magnetic environment and to accomplish pre-studies that decisively guide the design of a large passive shielding.