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Water Cherenkov detectors have been used in neutrino physics for decades, leading to major advances in our understanding of solar, supernova, and atmospheric neutrinos. Historically, the cost and scalability advantages inherent to this technology have been balanced by insensitivity in other areas. For instance, unlike magnetized calorimeters, water Cherenkov detectors are insensitive to the sign of the neutrino; also, vertex resolution is poor compared to that of a liquid argon time projection chamber (TPC).
Since the dawn of the 21st century, significant efforts have been made to upgrade the capabilities of water Cherenkov detectors. These include the addition of a small quantity of gadolinium, which enables neutron tagging that can be used to discriminate neutrinos from antineutrinos. In parallel, next-generation photosensors, such as Large Area Picosecond Photo-Detectors (LAPPDs) have been developed, which have the potential to turn water Cherenkov detectors into "optical TPCs".
Once fully implemented, these emerging technologies will boost the potential for fundamental neutrino physics in areas such as supernova neutrino detection. They will also add the capacity for applied antineutrino physics, harnessing neutrinos for nuclear threat reduction.
This talk will present an overview of up and coming water Cherenkov technologies. It will include the current status of implementation in detectors such as Super-Kamiokande and ANNIE, and it will present the prospects for pure and applied physics.
Videoconference via https://us02web.zoom.us/j/82070795505