Digital systems for field-cycling NMR instrumentation

GUILLERMO O. FORTE; GUILLERMO BUSTOS; HECTOR H. SEGNORILE; E. ANOARDO

Conferencia; 10th Conference on FFC NMR Relaxometry; 2017

Wepresentdifferent digital modules that can be used for diverse applicationswithin the frame of field-cycling NMR [1]. A first bi-modular prototype allowsdesigning autonomous powerful systems based on the acquisition of signals (tenchannels), signal processing, analog outputs and different communication busprotocols. It can be used as a basic unit for the development of particularhardware solutions as magnetic field compensation for low-fields experiments,magnetic field control & power management, interlock system check ups andother instrumentation applications. One module contains the DSP (TexasTMS320F28335) and a second module enhances the A/D and D/A convertioncapacities. The prototype was tested in active magnetic field compensation withnoise cancelation.Asecond much more powerful system (DIXITAL) is under development. This modulardigital platform is specially designed for fast field-cycling (FFC) MRI,relaxometry, double resonance, general NMR (up to 250MHz) and other non-NMRapplications (RADAR, SDR, etc.). It includes the digital management of RF transmissionand reception functions, FFC field control, magnetic field gradients controls,among other. We willpresent general features of these systems, technical characteristics andexamples of applications within the context of FFC. [1]- Funded byFONCyT (Argentina), projects 2013-1380 and 2013-2600.