Precision magnetometry

低场磁共振实验和生物磁测量所需的磁场稳定性要求开发精确的磁力计。本项目的目标是建立一个小型化的原子铯磁力计。为此，我们将设置坚固紧凑的传感器头和优化的电子和激光单元。利用一种新的激光器和保偏单模光纤，我们将尝试提高光的幅度和频率稳定性，并将磁强计噪声降低一个数量级。这将在典型磁场中的基线漂移测量中得到验证。改进后的系统应用于PTB柏林屏蔽室BMSR-2的生物磁测量。

The required stability of magnetic fields for low field magnetic resonance experiments and biomagnetic measurements requires the development of precise magnetometers. The goal of this project is to build a miniaturized atomic Cs magnetometer. For that we will set up robust and compact sensor heads and an optimized electronic and laser unit. Using a new laser and polarization maintaining monomode fibers we will try to increase the amplitude and frequency stability of the light and reduce the magnetometer noise by an order of magnitude. This will be verified in measurements of the base line drift in typical magnetic fields. The improved system shall be used for biomagnetic measurements in the shielded room BMSR-2 at PTB Berlin.