Master thesis defense: Nikolaos A. Kiigmas

Magnetic Transduction for Optically Pumped Magnetometry

The application of fundamental physical principles to biomedical imaging has continuously driven the development of non-invasive diagnostic tools. As clinical demands for more detailed and high-resolution imaging expand, classical detection methods are approaching their limits. To overcome these boundaries, quantum mechanics provides a new pathway for advancement, where quantum sensing promises increased sensitivity levels and enables new diag nostic methods.

This thesis details the development of a Magnetic Transduction Coil-based system to be integrated into a Quantum Magnetic Induction Tomography experiment, utilizing an Optically Pumped Magnetometer as the main quantum sensing device. The first chapter gives a brief introduction to the core ideas of magnetometry and Magnetic Induction Tomography (MInT) and how the thesis aims to implement these ideas. The second chapter focuses on the quantum sensor. The basic principles of Optically Pumped Magnetometers

(OPMs) are introduced together with an experimental demonstration. The third chapter shifts the attention to classical electromagnetism. It provides the necessary theoretical basis for our experiment. The fourth chapter demonstrates the physical implementation of the experiment with its first results and active improvements. In the final chapter we draw the conclusions from the experimental findings and the future directions and developments.