PROSPECT-II Design and R&D

The Precision Reactor Oscillation and SPECTrum (PROSPECT) experiment is a short-baseline reactor experiment with the goal of measuring the antineutrino spectrum from the High Flux Isotope Reactor (HFIR). It searches for potential short-baseline oscillations and the existence of sterile neutrinos. PROSPECT has already set new limits on the existence of eV-scale sterile neturinos while achieving the highest signal-to-background ratio on any surface antineutrino detector. The collaboration has developed an upgraded detector design, called PROSPECT-II, which will increase the detector's statistics and physics sensitivity. This talk will describe major design features of the PROSPECT-II detector, highlighting improved design elements with respect to the first-generation PROSPECT-I detector, as well as recent R&D accomplishments.