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HK: Fachverband Physik der Hadronen und Kerne
HK 61: Astroparticle Physics II
HK 61.3: Vortrag
Freitag, 3. April 2020, 11:45–12:00, J-HS L
Atomic Tritium Production and Trapping for Neutrino Mass Measurement in Project 8 — •Alec Lindman for the Project 8 collaboration — PRISMA+ Cluster of Excellence, JGU Mainz
Project 8 is a phased experiment using tritium β-decay to investigate the absolute neutrino mass. Good energy precision, high statistics, and well-controlled systematics are required to reach an electron antineutrino mass limit of ≤ 40 meV. Our technique, Cyclotron Radiation Emission Spectroscopy (CRES), has achieved eV-scale resolution at 17.8 keV, near the tritium endpoint. Project 8 will be the first laboratory neutrino mass experiment to use atomic tritium (T). Decay of a T2 molecule excites rovibrational states that smear the observed energy by ≈ 1 eV. The decay of T, however, has an energy smearing of ≤ 0.1 eV. Our baseline calls for trapping 30 mK atomic tritium in a 2-T-deep, 10+-m3 superconducting magnetic bottle. I will discuss our approach to this large-volume atomic CRES experiment, focusing on production and handling techniques for recombination-prone tritium atoms.
This work is supported by the PRISMA+ Cluster of Excellence at the University of Mainz, the US DOE Office of Nuclear Physics, the US NSF, and internal investments at all institutions.