Development of a diagnostic system for atomic processes in the whole divertor region of HL-3.

The atomic processes are important for understanding the mechanisms of divertor detachment physics. The developed diagnostic system for atomic processes aims to present the atomic process distributions of ionization and recombination in the whole divertor region of HL-3, which is equipped with the multi-channel visible imaging optics, two SCMOS cameras having identical parameters, and bandpass filters. This configuration enables high spatiotemporal resolution measurements of Balmer lines across the entire divertor region.