Construction of St. Benedict

M. Brodeur, T. Ahn, D. W. Bardayan, D. P. Burdette,J. A. Clark, A. T. Gallant,J. J. Kolata,B. Liu, P. D. O'Malley, W. S. Porter,R. Ringle, F. Rivero, G. Savard, A. A. Valverde, R. Zite

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS（2023）

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摘要

The Superallowed Transition Beta-Neutrino Decay Ion Coincidence Trap (St. Benedict) is currently under construction at the University of Notre Dame Nuclear Science Laboratory. It is designed to measure the beta-neutrino angular correlation parameter in superallowed mixed beta-decay transitions between mirror nuclei in order to extract the Fermi-to-Gamow Teller mixing ratio and test theoretical corrections entering in the determination of the ??????????????????element of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. St. Benedict includes a large volume gas catcher to thermalize the radioactive ion beam from TwinSol, a differentially-pumped extraction system, a radiofrequency quadrupole ion cooler and buncher, and a Paul trap for the observation and detection of the ?????? decay products. The status of each of these components will be presented.

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关键词

Test of the Standard Model,Beta decays,Radioactive ion beams,Beam thermalization,Ion guides,Paul trap

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