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Designing a platform that allows full field-map of permanent magnets using magnetic resonance

Designing a platform that allows full field-map of permanent magnets using magnetic resonance
Type:Master Thesis

Prof. Dr. Jan G. Korvink
Dr. Mazin Jouda

Field of Study:

Mechanical engineering, electrical engineering

Links:NMR Micro-technologies for Imaging and Spectroscopy

Job description

Can we measure a magnetic field as high as 10T at precisions below ppb? The goal of this project is to do so with a smart and commercial repurposing of the phenomena of magnetic resonance.

Measuring a magnetic field

Magnetic fields are of interest in varied applications like electric motors, magnetic resonance imaging, or smartphone sensors and have a high impact in research and industry alike. However, their creation is not straightforward, requiring precise control and strict quality measurement. This is often done with Hall sensors, however, these have a limited precision. Another option, is to use Magnetoresistive sensors, but these struggle at higher magnetic fields. Through the use of NMR, the measurement becomes frequency dependent and can be indefinitely precise and accurate. For these reason some large NMR field probes have already been implemented commercially (see Metrolab).  

The project

The aim of the project is to completely develop a NMR magnetic field probe for the measurement of small scale volumes (read ’pixel’ sizes) in the sub-mm range. The size will be based on the success of the project and can reach a publication stage.

The end goal is to fully map in XYZ a permanent magnet developed for magnetic resonance, for which high fields with a sub-ppm precision are needed.

Type of work

The project is very diverse, having simulation, design, electronic and experimental components:

  • State-of-the-art research and theoretical understanding.
  • Simulation of structures in a Multiphysics FEM-solver (COMSOL) with non-ideal conditions.
  • Development of PCB’s from design to fabrication.
  • Fabrication, interface and optimization of an RF coil. Possible microfabrication.


Starting date: on appointment


  • Interest in developing hardware for real world applications.
  • Familiarity with simple electronics and Maxwell’s electromagnetism.
  • Capable of working independently, selfmotivated, reliable.

Technical Contact

Dr. Mazin Jouda
Karlsruhe Institute of Technology
Institute of Microstructure Technology
P.O. Box 3640
76021 Karlsruhe

phone: +49 721 608-22746
e-mail: mazin joudaRzc2∂kit edu


Prof. Dr. Jan G. Korvink
e-mail: jan korvinkZws0∂kit edu