Development of portable NMR polarimeter system for polarized HD target

TL;DR

A portable NMR polarimeter system was developed using software and PXI technology, significantly reducing size and cost while maintaining comparable performance for measuring polarized HD targets in nuclear physics experiments.

Contribution

The paper introduces a compact, cost-effective portable NMR polarimeter system that maintains performance levels comparable to conventional systems for polarized HD target measurements.

Findings

The portable system's S/N ratio is about 50% of the conventional system.

The system's size was reduced from 80 kg to 7 kg.

Cost was reduced to 25% of the original.

Abstract

A portable NMR polarimeter system has been developed to measure the polarization of a polarized Hydrogen-Deuteride (HD) target for hadron photoproduction experiments at SPring-8. The polarized HD target is produced at the Research Center for Nuclear Physics (RCNP), Osaka university and is transported to SPring-8. The HD polarization should be monitored at both places. We have constructed the portable NMR polarimeter system by replacing the devices in the conventional system with the software system with PCI eXtensions for Instrumentation (PXI). The weight of the NMR system is downsized from 80 kg to 7 kg, and the cost is reduced to 25%. We check the performance of the portable NMR polarimeter system. The signal-to-noise (S/N) ratio of the NMR signal for the portable system is about 50% of that for the conventional NMR system. This performance of the portable NMR system is proved to be compatible with the conventional NMR system for the polarization measurement.