Bimodal Q-band Probe Head with Improved Signal-to-Noise Ratio in Pulse Electron Paramagnetic Resonance

The developed probehead which is a combination of the bimodal resonator operating in transmission mode and the low noise amplifier led to at least 2-fold improvement in sensitivity of the electron-paramagnetic-resonance spectrometer independent of sample temperature. The probehead is compatible with commercial Bruker spectrometers without their modification.