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SUMMARY:INPA Seminar Speaker: Larisa Throne (JGU Mainz)-Title: The Role of Atomic Tritium in Future Neutrino Mass Experiments
DESCRIPTION:Date: February 21\, 2025 \nTime: 12:00 am – 1:00 pm \nLocation: Sessler Conference Room – 50A-5132 [Hybrid and In-Person] \nSpeaker: Larisa Throne (JGU Mainz) \nTitle: The Role of Atomic Tritium in Future Neutrino Mass Experiments \nAbstract: Nearly 70 years since the neutrino was discovered and 25 years since the discovery of neutrino oscillations established its non-zero mass\, the absolute neutrino-mass scale remains unknown. Tritium beta decay endpoint measurements currently offer the best upper limit on the neutrino mass. A next-generation experiment with greater sensitivity must overcome one of the major systematics for this kind of measurement: the molecular nature of the beta decay source. Current and past tritium beta decay experiments use a molecular tritium source in which one of the tritium atoms undergoes decay. A fraction of the decay energy excites the molecule into rotational\, vibrational\, or electronic excited states; this causes broadening in the molecule’s final state distribution (FSD)\, and has a smearing effect on the beta decay spectrum. In order to achieve a reduced systematic uncertainty due to this FSD smearing\, next-generation experiments must switch to an atomic tritium source.\nI will present an overview of the necessary steps to develop an atomic tritium source through the lens of the Project 8 experiment. This multi-institution development program includes dissociation of molecular tritium\, cooling the resulting tritium atoms via a two-step process down to 10mK\, and trapping them magnetically. In addition to this overview\, I will focus on the multitude of tritium-compatible diagnostic tools being developed at JGU Mainz to measure atom flux\, atom beam shape\, and temperature. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95016696011?pwd=Tk1XOW1Xd3RYRnlsc2tEYmRWZlVVZz09 \nMeeting ID: 950 1669 6011 \nPasscode: 247722
URL:https://inpa.lbl.gov/event/inpa-seminar-speaker-larisa-throne-jgu-mainz-title-the-role-of-atomic-tritium-in-future-neutrino-mass-experiments/
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