Status of the Project 8 Neutrino Mass Experiment

Jun 11, 2025, 2:23 PM
23m
Great Hall

Great Hall

Parallel session presentation Neutrino Masses, Mixings and Interactions Neutrino Masses. Mixings and Interactions

Speaker

Hannah Binney (MIT)

Description

Although neutrino oscillation experiments demonstrate that neutrinos must have mass, their mass currently remains unmeasured. The Project 8 experiment aims to directly probe the neutrino mass by measuring the shape of the tritium beta decay spectrum near its endpoint. The collaboration is pioneering the Cyclotron Radiation Emission Spectroscopy (CRES) technique to measure the kinetic energy of trapped electrons by detecting the cyclotron radiation they emit in a magnetic field. Following the collaboration's first upper limit on the neutrino mass during the Phase II experiment, we have been developing technology to achieve a target sensitivity of 0.04 eV. After a brief overview of the Phase II results, 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. Then, I will discuss plans to scale up detector volume for the Low Frequency Apparatus (LFA) and present work toward development of a cold atomic tritium source.

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