THEIA is a proposed 25-100 kiloton multi-purpose neutrino detector using novel target materials and advanced light detection techniques to address a wide range of neutrino and rare event physics. Key to this is the ability to separate scintillation and Cherenkov light using high-precision timing photo-sensors. Water-based-liquid-scintillator (WbLS) can be used to optimize the relative ratio of both light species for this purpose. This allows to combine high energy resolution with directional information while providing unique tracking and particle-identification capabilities. To fully unlock this potential THEIA is supported by a rich R&D program.
This talk will give an overview over the project and is rich physics program and it will highlight some of the technological developments involved.