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Description:

A major remaining challenge for Nb3Sn high field magnets is their training due to random temperature variations in the coils. The main objective of our research is to reduce or eliminate it by finding novel impregnation materials with respect to the epoxies currently used. An organic olefin-based thermosetting dicyclopentadiene (DCP) resin, C10H12, commercially available in Japan as TELENE® by RIMTEC, was used to impregnate a short Nb3Sn undulator coil developed by ANL and FNAL. This magnet reached short sample limit after only two quenches, compared with 50+ when CTD-101K® was used. Ductility, i.e. the ability to accept large strains, and toughness were identified as key properties to achieve these results. In addition, we have been investigating whether mixing TELENE with high heat capacity ceramic powders, increases the specific heat (Cp) of impregnated Nb3Sn superconducting magnets. The viscosity, heat capacity, thermal conductivity, and other physical properties of TELENE with high-Cp powder fillers were measured in this study as a function of temperature and magnetic field. Mixing TELENE with either Gd2O3, Gd2O2S, and HoCu2 increases its Cp tenfold.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: superconducting magnet, training, dicyclopentadiene, resin impregnation, specific heat

Date published: 2024-04-01

Publisher: IOP Publishing

Journal:

• Superconductor Science and Technology (ISSN: 13616668) vol. 37 issue. 4 045008

Funding:

• DOE US-Japan Science and Technology Cooperation Program in High Energy Physics (日米科学技術協力事業（高エネルギー物理分野）)
• Fermi Research Alliance, LLC. Contract No. DE-AC02-07CH11359 with the U.S. DOE

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1088/1361-6668/ad2c25

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Updated at: 2024-08-21 16:30:31 +0900

Published on MDR: 2024-08-21 16:30:31 +0900