The GADGET Program at FRIB

The GADGET detection system provides a versatile and powerful setup for decay studies at FRIB. It features two complementary configurations: GADGET I, which utilizes a gaseous proton detector that measures the energy of charged decay products while suppressing β-background, and GADGET II, which incorporates a time projection chamber that reconstructs three-dimensional particle tracks, providing particle identification, and enabling multi-particle detection. Both operate with a germanium array, including the DEGAi HPGe, for gamma singles and particle–gamma coincidence measurements.

This talk will present an overview of the GADGET program as it relates to the FRIB Decay Station initiator (FDSi), including novel analysis methods, recent results, and future plans. We will discuss the ongoing analysis of a GADGET II measurement employing machine learning and AI for rare-event searches and event classification. We will also preview two GADGET II experiments scheduled to run in November 2025 that address key Type I X-ray burst reaction rate uncertainties, as well as three additional PAC3-approved experiments: a GADGET II measurement of beta-delayed fission and two GADGET I studies of reactions relevant to supernovae and classical novae.