Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 58: Neutrino physics 8
T 58.1: Talk
Wednesday, March 6, 2024, 16:00–16:15, Geb. 30.22: Gaede-HS
Synthesis and Applications of Low Background Modified Polyethylene Naphthalate (PEN-G) — •Brennan Hackett1, Andreas Leonhardt2, Maximilian Goldbrunner2, Peter Bauer4, Florian Puch4, and Markus Stommel3 for the LEGEND collaboration — 1Max-Planck Institut für Physik, Garching, Germany — 2Technische Universität München, Garching, Germany — 3Leibniz-Institut für Polymerforschung, Dresden, Germany — 4Thüringisches Institut für Textil- und Kunststoff-Forschung, Rudolstadt, Germany
Identification of background radiation is of utmost importance for enabling rare event experiments to attain the required sensitivities for probing new physics. Poly(ethylene-2,6-naphthalate) (PEN) has emerged as a highly promising material for such experiments due to its intrinsic scintillating properties and its adaptability as a structural material at both room and cryogenic temperatures. Notably, PEN has been successfully implemented in the LEGEND-200 experiment involving ∼200 kg of the target isotope 76Ge for investigating neutrinoless double beta decay. In LEGEND-200, PEN serves as both an active material and a structural component within the detector assembly. Looking towards the next-generation experiment, LEGEND-1000 will further reduce background radiation by an order of magnitude. To achieve this goal, we are looking to expand more potential applications of PEN-G. To this end, we have successfully synthesized PEN in kilogram batches utilizing unique reagents. The radiopurity of the synthesized PEN has been measured, and we are exploring strategies to improve these values. In this presentation, we will outline the results.
Keywords: LEGEND; PEN; Plastikscintillator