Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session E12: Minisymposium: Low Energy Neutrinos III: Neutrinoless Double-Beta Decay III & Detector Technology I
7:00 PM–10:30 PM,
Wednesday, November 29, 2023
Hilton Waikoloa Village
Room: Kona 5
Chair: Julieta Gruszko, University of North Carolina
Abstract: E12.00013 : Making low radioactivity connections*
10:00 PM–10:15 PM
Presenter:
Richard Saldanha
(Pacific Northwest National Laboratory (PNNL))
Authors:
Richard Saldanha
(Pacific Northwest National Laboratory (PNNL))
Isaac Arnquist
(Pacific Northwest National Laboratory)
Maria Laura diVacri
(Pacific Northwest National Laboratory)
Nicole Rocco
(Pacific Northwest National Laboratory)
Tyler Schlieder
(Pacific Northwest National Laboratory)
In this talk I will present a comprehensive investigation into the fabrication process of copper-polyimide flexible cables and the development of custom low radioactivity cables for use in rare-event physics applications. A methodical step-by-step approach was developed and informed by ultrasensitive assay to determine the radiopurity in the starting materials and identify the contaminating production steps in the cable fabrication process. We have demonstrated a roughly 100x reduction in 238U and 20x reduction in 232Th compared to commercial cables, with the potential to significantly reduce radioactive backgrounds for neutrinoless double beta decay and dark matter experiments such as nEXO and Oscura.
*This work was partially supported by the U.S. Department of Energy Office of Science, Office of Nuclear Physics, under the Early Career Research Program and the SBIR Program (Award No. DE-SC0021547).
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