Phase II of the Project 8 neutrino mass experiment using Cyclotron Radiation Emission Spectroscopy

Project 8 is a neutrino mass experiment that uses a new technique, Cyclotron Radiation Emission Spectroscopy (CRES), to make a differential measurement of the tritium $\beta^{-}$ spectrum. Project 8 aims to use the advantages of CRES to overcome the systematic and statistical limitations of current-generation direct measurement methods. It will proceed in a phased approach toward a goal of effective electron antineutrino mass sensitivity of ${\sim}$40 meV/c$^2$. This talk will introduce CRES and Project 8, and will report on recent Phase II results. These include systematic studies using monoenergetic conversion electrons from $^{83m}$Kr, as well as analysis progress and preliminary data from the ongoing final Phase II molecular tritium spectrum measurement, which is the first continuous spectrum measured using CRES.