Entwicklung externer und interner Magnetfelder für ein EDM Experiment

由于粒子密度的增加，新一代超冷中子源（UCN）的安装使粒子物理学中一个基本实验——中子电偶极矩（EDM）的测量——的限制提高了两个数量级，达到dn < 5•10~28 e-。由于目前的实验不仅受到统计数据的限制，而且受到系统误差的限制，因此必须通过相应的研究来准备新的实验。众所周知，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，并完成预先研究，决定性地指导大型被动屏蔽的设计。

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.