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DOE OSTI · 2589113

First on-line commissioning experiments at the St. Benedict facility

Porter, W. S. [University of Notre Dame, IN (United States)] (ORCID:0000000251723298)·Brodeur, M. [University of Notre Dame, IN (United States)]·Bruce, O. [University of Notre Dame, IN (United States)]·Burdette, D. P. [Argonne National Laboratory (ANL), Argonne, IL (United States)]·Clark, J. A. [Argonne National Laboratory (ANL), Argonne, IL (United States)]·Eversole, O. [University of Notre Dame, IN (United States)] (ORCID:0009000123714335)·Gallant, Aaron T. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·Houff, A. M. [University of Notre Dame, IN (United States)]·Kolata, J. J. [University of Notre Dame, IN (United States)] (ORCID:0000000236642297)·Markel, E. [University of Notre Dame, IN (United States)]·O’Malley, P. D. [University of Notre Dame, IN (United States)]·Rivero, F. [University of Notre Dame, IN (United States)]·Savard, G. [Argonne National Laboratory (ANL), Argonne, IL (United States)]·Schroeder, D. [University of Notre Dame, IN (United States); Middlebury College, Middlebury, VT (United States)] (ORCID:0009000754561080)·Valverde, A. A. [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:0000000291186589)·Zite, R. [University of Notre Dame, IN (United States)]·Bardayan, D. W. [University of Notre Dame, IN (United States)]·Carmichael, S. R. [University of Notre Dame, IN (United States)]·Dembski, C. [University of Notre Dame, IN (United States)] (ORCID:0000000191719421)·Magro, P. L. D. [Univ. of Sao Paulo (Brazil)]·von Seeger, W. W. [University of Notre Dame, IN (United States)]
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Abstract

Nuclear beta decays provide an excellent probe of fundamental symmetries due to their mediation by the weak interaction. In particular, precise measurements of these decays provide constraints on the unitarity of the Cabbibo-Kobayashi-Maskawa (CKM) quark-mixing matrix. While superallowed pure Fermi decays currently set the most precise limits, the alternative suite of superallowed mixed mirror decays has been ill-studied. These nuclei can provide an important consistency check of calculation and measurement methods employed for the pure Fermi decays, more critically needed now in the wake of a 2.4σ deviation from unitarity of the CKM matrix. In order to remedy the gap in data for mirror decays, the Superallowed Transition Beta-Neutrino Decay Ion Coincidence Trap (St. Benedict) facility is being commissioned at the University of Notre Dame’s Nuclear Science Laboratory (NSL). In this paper, we present first results of the commissioning of the St. Benedict facility on-line at the TwinSol radioactive beam facility. The results of initial commissioning experiments involving the St. Benedict gas catcher, RF carpet, RFQ ion guide and RFQ cooler-buncher will be presented.

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Porter, W. S. [University of Notre Dame, IN (United States)] (ORCID:0000000251723298), Brodeur, M. [University of Notre Dame, IN (United States)], Bruce, O. [University of Notre Dame, IN (United States)], Burdette, D. P. [Argonne National Laboratory (ANL), Argonne, IL (United States)], Clark, J. A. [Argonne National Laboratory (ANL), Argonne, IL (United States)], Eversole, O. [University of Notre Dame, IN (United States)] (ORCID:0009000123714335), Gallant, Aaron T. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Houff, A. M. [University of Notre Dame, IN (United States)], Kolata, J. J. [University of Notre Dame, IN (United States)] (ORCID:0000000236642297), Markel, E. [University of Notre Dame, IN (United States)], O’Malley, P. D. [University of Notre Dame, IN (United States)], Rivero, F. [University of Notre Dame, IN (United States)], Savard, G. [Argonne National Laboratory (ANL), Argonne, IL (United States)], Schroeder, D. [University of Notre Dame, IN (United States); Middlebury College, Middlebury, VT (United States)] (ORCID:0009000754561080), Valverde, A. A. [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:0000000291186589), Zite, R. [University of Notre Dame, IN (United States)], Bardayan, D. W. [University of Notre Dame, IN (United States)], Carmichael, S. R. [University of Notre Dame, IN (United States)], Dembski, C. [University of Notre Dame, IN (United States)] (ORCID:0000000191719421), Magro, P. L. D. [Univ. of Sao Paulo (Brazil)], von Seeger, W. W. [University of Notre Dame, IN (United States)]. 2025-07-24. First on-line commissioning experiments at the St. Benedict facility. https://doi.org/10.1088/1402-4896%2Fadeed8

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