Test Results for a Superconducting 28-GHz Ion Source Magnet for FRIB

Arbelaez, Diego; Pan, Heng; Myers, Scott A.; Hafalia, A.R.; Wang, Xiaorong; Turqueti, Marcos; Taylor, J. D.; Prestemon, S.; Félice, H.; Rochepault, Etienne; Pozdeyev, E.; Machicoane, G.; Omelayenko, Mykola; Rao, Xing

doi:10.1109/tasc.2019.2898595

Cited by 3 publications

(1 citation statement)

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“…Training is a critical issue [9], for future 12-16 T class Nb 3 Sn magnets based high energy proton-proton colliders [10] that need thousands of such magnets. Training is also relevant for many other applications of Nb-Ti and Nb 3 Sn superconducting magnets fabricated by epoxy impregnation, ranging from MRI [11], NMR [12], fusion, undulator magnets for light sources [13], to ion source magnets [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Design of a High Toughness Epoxy for Superconducting Magnets and Its Key Properties

Yin

Swanson

Shen

2020

IEEE Trans. Appl. Supercond.

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Nb 3 Sn accelerator magnets are poised to enable the luminosity upgrade of the Large Hadron Collider (LHC) at CERN, improving its potential for exploring physics beyond the standard model of particle physics. The prototype Nb 3 Sn magnets consistently need 10-25 quenches to achieve their best performance. A hypothesis is that the long training of these magnets may at least be partially induced by epoxy cracking and bonding failures. In 2018, we showed that several existing epoxies have a higher toughness and less tendency to crack at low temperatures than CTD-101K, the epoxy resin with which almost all Nb 3 Sn accelerator magnets have been impregnated. Here we explore a new high toughness formulation for reducing quench training of Nb 3 Sn accelerator magnets, through combining two amine curing agents to achieve a good glass transition temperature (T g ), adding a viscosity reducer to achieve low viscosity, and experimenting a coupling agent for improved bonding strengths. We report results of comprehensive materials tests, including thermal shock, tensile, compressive, shear tests, viscosity and T g tests.

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