PoS - Proceedings of Science
Volume 441 - XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP2023) - Neutrino Physics and Astrophysics
Building an atomic source for the Project 8 experiment
L. Thorne* and  On behalf of the Project 8 Collaboration
Full text: pdf
Pre-published on: February 12, 2024
Published on: March 22, 2024
There have been significant gains in characterizing neutrino properties in recent years, however the absolute neutrino mass scale continues to be elusive. The Project 8 collaboration seeks to probe this quantity directly via kinematic analysis of tritium beta decay, using the cyclotron radiation emission spectroscopy (CRES) technique. In order to make neutrino mass measurements with a design sensitivity of 40meV, the Project 8 experiment must use atomic tritium. To create an atomic tritium source suitable for the Project 8 experiment, molecular tritium is thermally dissociated into atomic tritium, which is then state selected and cooled.
I will report on the current status of the atomic source development, covering subsystems for dissociation in coaxial cracker design, followed by accommodation from a surface which is held at O(10) K. The requisite low-field-seeking states are then magnetically guided, evaporatively cooled, and injected into the trap where the atoms decay.
DOI: https://doi.org/10.22323/1.441.0231
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