CERN Accelerating science

Article
Report number	arXiv:2211.10213
Title	Training Curves of Nb$_3$Sn Rutherford Cables With a Wide Range of Impregnation Materials Measured in the BOX Facility
Related title	Training performance of Nb$_3$Sn Rutherford cables in a channel with a wide range of impregnation materials
Author(s)	Otten, S. (Twente U., Enschede) ; Kario, A. (Twente U., Enschede) ; Wessel, W.A. J. (Twente U., Enschede) ; Leferink, J. (Twente U., Enschede) ; ten Kate, H.H.J. (Twente U., Enschede) ; Daly, M. (PSI, Villigen) ; Hug, C. (PSI, Villigen) ; Sidorov, S. (PSI, Villigen) ; Brem, A. (PSI, Villigen) ; Auchmann, B. (PSI, Villigen ; CERN) ; Studer, P. (Zurich, ETH) ; Tervoort, T. (Zurich, ETH)
Publication	2023-08
Imprint	2022-11-18
Number of pages	5
In:	IEEE Trans. Appl. Supercond. 33 (2023) 4003605
In:	Applied Superconductivity Conference, Honolulu, Hawaii, United States, 23 - 28 Oct 2022, pp.4003605
DOI	10.1109/TASC.2023.3267051
Subject category	physics.acc-ph ; Accelerators and Storage Rings
Abstract	Training of accelerator magnets is a costly and time consuming process. The number of training quenches must therefore be reduced to a minimum. We investigate training of impregnated Nb3Sn Rutherford cable in a small-scale experiment. The test involves a Rutherford cable impregnated in a meandering channel simulating the environment of a canted-cosine-theta (CCT) coil. The sample is powered using a transformer and the Lorentz force is generated by an externally applied magnetic field. The low material and helium consumption enable the test of a larger number of samples. In this article, we present training of samples impregnated with alumina-filled epoxy resins, a modified resin with paraffin-like mechanical properties, and a new tough resin in development at ETH Zürich. These new data are compared with previous results published earlier. Compared to samples with unfilled epoxy resin, those with alumina-filled epoxy show favorable training properties with higher initial quench currents and fewer training quenches before reaching 80% of the critical current.
Copyright/License	publication: (License: CC BY 4.0) preprint: (License: CC BY 4.0)

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