Digital systems for field-cycling NMR instrumentation

G. O. FORTE; G. BUSTOS; H. H. SEGNORILE; E. ANOARDO

Conferencia; 10th Conference on Fast Field-Cycling NMR Relaxometry; 2017

University of Warmia and Manzury

We present different digital modules that can be used for diverse applications within the frame of field-cycling NMR. A first bi-modular prototype allows designing autonomous powerful systems based on the acquisition of signals (ten channels), signal processing, analog outputs and different communication bus protocols. It can be used as a basic unit for the development of particular hardware solutions as magnetic field compensation for lowfields experiments, magnetic field control & power management, interlock system check ups and other instrumentation applications. One module contains the DSP (Texas TMS320F28335) and a second module enhances the A/D and D/A convertion capacities. The prototype was tested in active magnetic field compensation with noise cancelation.A second much more powerful system (DIXITAL) is under development. This modular digital platform is specially designed for fast field-cycling (FFC) MRI, relaxometry, double resonance, general NMR (up to 250MHz) and other non-NMR applications (RADAR, SDR, etc.). It includes the digital management of RF transmission and reception functions, FFC field control, magnetic field gradients controls, among other.We will present general features of these systems, technical characteristics and examples of applications within the context of FFC.