FT-ESR measurements as an application of millimeter wave gyrotron

Gyrotron is a high-power radiation source in the millimeter and submillimeter wave region, which is suitable for the radiation source of a high frequency (high magnetic field) short-pulsed ESR system. Pulsed ESR spectroscopy system was developed using the high-power millimeter wave of gyrotron. The FID signal of stable radicals of BDPA diluted with polystyrene was successfully observed by the quadrature detection method. By Fourier transforming of these FID signals, high resolution FT-ESR spectrum of BDPA was successfully obtained.