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Jun 27 – 30, 2023
Ramsey Auditorium
America/Chicago timezone

A Measurement of the Ambient Radon Rate and MeV-Scale Calorimetry in the MicroBooNE LArTPC

Not scheduled
20m
Ramsey Auditorium

Ramsey Auditorium

Fermilab

Speaker

Will Foreman (Illinois Institute of Technology)

Description

Many physics goals of future large LAr detectors like DUNE hinge on the achievement of high radio-purity to minimize backgrounds to low-energy signals like supernova and solar neutrinos. Radon in particular is a concerning source of backgrounds, as its progeny generate diffuse signals from betas, gammas, and neutrons at the MeV-scale. In this talk, we report measured limits on the specific activity of Rn222 in the bulk LAr of the MicroBooNE neutrino detector at Fermilab during standard data-taking periods. This measurement, achieved with newly developed low-energy LArTPC reconstruction and analysis techniques, is the first of its kind for a noble element detector incorporating liquid-phase purification. We also demonstrate the calorimetric capabilities of single-phase LArTPC technology at the ~MeV and sub-MeV scale with reconstructed energy spectra of betas and alphas from tagged isotope decays.

Primary author

Will Foreman (Illinois Institute of Technology)

Presentation materials