Monitoring of the 129Xe polarization by NMR during spin-exchange optical pumping (SEOP) is vital for quality control and for experimental investigations into optimizing system running parameters. In this study, we present a compact NMR spectrometer designed to improve user flexibility and reduce cost for online polarimetry on a 129Xe SEOP system. A Java-based user interface was developed to control the system with an Arduino based hardware control. The performances of the user interface and hardware in routine 129Xe NMR spectrometer measurements are demonstrated herein.
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