Development and operational validation of a hybrid data acquisition and remote participation framework for the GAMMA 10/PDX tandem mirror

A hybrid data acquisition (DAQ) and remote participation framework has been developed for the tandem mirror GAMMA 10/PDX to support advanced confinement, boundary-plasma, and divertor-simulation studies. The system integrates a long-established CAMAC-based DAQ for core diagnostics with a complementary PXI-based platform that enables high-bandwidth measurements such as Doppler reflectometry, high-speed soft X-ray measurements, and gold neutral beam probe diagnostics. Stand-alone PC-based systems further provide spectroscopic, imaging, and probe measurements for divertor-simulation experiments. A unified timing scheme ensures shot-synchronized acquisition across all platforms. Operational performance was evaluated during the 2023 autumn campaign, in which 450 consecutive discharges were successfully recorded with a CAMAC transfer success rate of 100 % and a PXI waveform-loss rate of 0 %. Remote data access through the LABCOM system at NIFS enabled near-real-time monitoring of selected diagnostics, supporting multi-institutional collaboration. Metadata integration via the g10db system further enhanced data accessibility and facilitated coordinated analysis. Selected PXI diagnostic data were published to LABCOM within approximately 1 min after each discharge. The framework also provides a basis for initial data-driven applications, including initial machine-learning-assisted diagnostic inference. Future development will focus on full PXI migration, real-time metadata tagging, and expanded data-driven research capabilities.