Development of an L-band rapid scan EPR digital console.

摘要: Abstract The development of a digital console for in-vivo rapid scan electron paramagnetic resonance (RS-EPR) spectroscopy and imaging is described in detail. was build using field programmable gate array (FGPA) technology that permits real-time control the resonator scanning magnetic fields during measurements. Automatic tuning matching are achieved by implementing feedback system voltage-tunable capacitors. A band-pass subsampling method used to directly digitize EPR signals at carrier frequencies about 1.2 GHz. waveforms, excitation frequency, sampling clock all internally synchronized. Full-cycle RS-EPR accumulated FPGA real time without any gaps. result elimination re-arm time, which data not acquired. proposed design this manuscript has small footprint relatively low cost. FPGA-based tested standard LiNc-BuO tempone-d16 samples. linewidth sample consistent with an independent pulsed measurement.