In the conventional electron paramagnetic resonance (EPR) one uses the microwave excitation at a fixed frequency and sweeps the magnetic field to match the resonance condition. Modern superconducting magnets can perform slow sweeps only (0.2 – 1 T/min). In our group, we take another approach – sweeping the microwave frequency instead of the magnetic field. It allows us to acquire EPR spectra a thousand times faster. Consequently, we perform fast frequency scans during the slow sweep of the magnetic field and obtain very detailed two-dimensional (field and frequency) resonance maps (≈50000×1000 points). Unfortunately, the frequency sweeps bring undesired strong background signals and other artefacts. In this Master topic, the student will work on the digital processing of such maps to remove the background and other undesired signals.
Supervisor: Dr. Oleksii Laguta