The Data Acquisition System for Phase-III of the BeEST Experiment

C. Bray, S. Fretwell, I. Kim, W. K. Warburton, F. Ponce,K. G. Leach, S. Friedrich, R. Abells, P. Amaro, A. Andoche, R. Cantor, D. Diercks, M. Guerra, A. Hall, C. Harris, J. Harris, L. Hayen, P. A. Hervieux,G. B. Kim,A. Lennarz, V. Lordi, J. Machado, P. Machule, A. Marino, D. McKeen, X. Mougeot,C. Ruiz, A. Samanta,J. P. Santos, C. Stone-Whitehead

arxiv（2023）

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摘要

The BeEST experiment is a precision laboratory search for physics beyond the standard model that measures the electron capture decay of $^7$Be implanted into superconducting tunnel junction (STJ) detectors. For Phase-III of the experiment, we constructed a continuously sampling data acquisition system to extract pulse shape and timing information from 16 STJ pixels offline. Four additional pixels are read out with a fast list-mode digitizer, and one with a nuclear MCA already used in the earlier limit-setting phases of the experiment. We present the performance of the data acquisition system and discuss the relative advantages of the different digitizers.

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