CERN Accelerating science

Article
Title	Irradiation Induced Aging of Epoxy Resins for Impregnation of Superconducting Magnet Coils
Author(s)	Parragh, D M (CERN) ; Scheuerlein, C (CERN) ; Piccin, R (CERN) ; Ravotti, F (CERN) ; Pezzullo, G (CERN) ; Ternova, D (CERN) ; Taborelli, M (CERN) ; Lehner, M (Vienna, Tech. U., Atominst.) ; Eisterer, M (Vienna, Tech. U., Atominst.)
Publication	2024
Number of pages	7
In:	IEEE Trans. Appl. Supercond. 34 (2024) 1-7
DOI	10.1109/tasc.2023.3332705
Subject category	Accelerators and Storage Rings
Study	CERN FCC
Project	CERN HL-LHC
Abstract	Understanding the effect of radiation on the functional properties of epoxy resins is crucial for their application in future particle accelerators like the Future Circular Collider (FCC). We compare the irradiation induced aging rates of six epoxy resin systems that can be used for the vacuum impregnation of magnet coils. Aging is assessed based on Dynamical Mechanical Analysis (DMA), 3-point bending and outgassing tests. DMA storage and loss moduli evolutions reveal the effect of the competing influence of cross-linking and chain scission on the glass transition temperature ( Tg ). The same proton and gamma irradiation dose has a similar effect on the thermomechanical epoxy resin properties. Aging rates differ strongly for the different resins, and the fastest aging is observed for the MY750 resin system, which Tg decreases with a rate of about minus 9 °C/MGy.
Copyright/License	publication: © 2023-2025 The Authors (License: CC-BY-4.0)

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