Neutrino Detection and Imaging in Opaque Media

Breaking the paradigm of transparency, the LiquidO collaboration introduces a novel approach to low-energy neutrino detection. LiquidO uses an opaque medium with a short scattering length to confine light near its point of origin, capturing it with a dense grid of wavelength-shifting fibers read by SiPMs and fast electronics. This enables highly efficient particle identification, allowing event-by-event topological discrimination of positrons, electrons and gamma events.
With its strong background rejection capability and the possibility of loading dopants at high concentrations, since transparency is no longer required, LiquidO paves the way for a wide range of new physics measurements across high-energy, nuclear, medical, and accelerator physics, many of which are under active exploration. In this talk, we will share results from a 10-litre prototype, validating LiquidO’s imaging principle, and explore its first application in a reactor antineutrino detector, to be located approximately 35 meters from the core of one of Europe’s most powerful nuclear plants.