In EPR spectroscopy, a detected microwave signal of interest is often at same level or bellow as noise of a microwave detector. To improve signal to noise ratio, a modulation of signal before detection and demodulation after detection is done by device called Lock-in amplifier. However, this approach limits speed of experiments which are based on frequency scans. Therefore, such scans must be longer than period of modulation signal, by several orders. Alternative approach to increase signal to noise ratio an averaging of detected signal that is acquired by a high-speed digitizer. Aim of this project is to improve current software solution for HFEPR spectrometer. This will allow to compare two different approaches of improving signal to noise ratio, with respect to time efficiency.
Supervisor: Ing. Matúš Šedivý