Although neutrino oscillation experiments indicate that neutrinos must have mass, their mass currently remains unmeasured. The Project 8 experiment is a next generation experiment that aims to measure the neutrino mass directly using tritium beta decay spectroscopy. Specifically, Project 8 is pioneering the technique of cyclotron radiation emission spectroscopy (CRES) for measuring the energy of single electrons by detecting the cyclotron radiation they emit in a magnetic field. The Project 8 Collaboration plans to use CRES to overcome statistical and systematic challenges inherent in current beta spectroscopy experiments. Following the collaboration’s first upper limit on the neutrino mass during its Phase II experiment, it has been developing technology to achieve a final sensitivity of 0.04 eV. I will discuss the Phase II results as well as the R&D roadmap to achieve that high sensitivity, including developing scalable resonant cavities and a cold atomic tritium source. In particular, I will discuss the status and goals of the newest prototype, the Cavity CRES Apparatus (CCA), which will be the first CRES detector with resonant cavity geometry, as well as plans to achieve extremely high electron energy resolution.
