Water-based Liquid Scintillator R&D effort at Brookhaven National Laboratory

Water-based Liquid Scintillator (WbLS) is an innovative material for constructing large-scale detectors in neutrino and dark matter research. This innovative material features a tunable light yield, facilitated by an inline circulation system, which permits adaptable detector optimization tailored to various physics searches. At Brookhaven National Laboratory (BNL), both 1-ton and 30-ton scale WbLS demonstrators have been constructed and are operational to evaluate the material's stability, optical properties, and overall performance. The 1-ton detector, housed within an acrylic tank and coupled with 2-inch and 3-inch photomultiplier tubes (PMTs), has successfully measured the response of WbLS to cosmic muons and an alpha source. Additionally, the 30-ton detector, featuring Hamamatsu 10-inch PMTs submerged directly in the WbLS, promises further advancements in the technology. In this presentation, the latest experimental status and physics results will be shown.