SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 75: Calorimeter / Detector Systems III

T 75.2: Vortrag

Mittwoch, 22. März 2023, 16:05–16:20, WIL/C133

Development of PEN as an Optically Active Structural Material for Low Background Experiments — •Brennan Hackett¹, Iris Abt¹, Felix Fischer¹, Béla Majorovits¹, Luis Manzanillas^1,2, and Oliver Schulz¹ — ¹Max Planck Institute for Physcis, Munich, Germany — ²Synchrotron Soleil, Saint-Aubin, France

Neutrino physics and experiments searching for dark matter are pursuing novel low background and self-vetoing materials for components in order to improve their sensitivity. One material of interest is poly(ethylene-2, 6-naphatalate) (PEN) for its inherent scintillating and wavelength shifting properties, as well as its commercial availability and structural stability. Commercially available PEN films are limited in their applications and occasionally do not fulfill the stringent radiopurity and optical requirements of these experiments. As such, the PEN working group has developed a method to produce PEN components with excellent optical properties of thicknesses up to 5 mm, and with a specific activity of less than mBq/kg. PEN detector holders have been successfully installed in the LEGEND experiment and additional PEN structures are being evaluated to further expand the use of structural scintillators. Details of this R&D effort with commercial PEN and the progress on development of custom synthesized radio-pure PEN will be presented.