Training performance of Nb3Sn Rutherford cables in a channel with a wide range of impregnation materials

S. Otten; A. Kario; W. A. J. Wessel. J. Leferink; H. H. J. ten Kate; M. Daly; C. Hug; S. Sidorov; A. Brem; B. Auchmann; P. Studer; T. Tervoort

arXiv · 2211.10213

Training performance of Nb3Sn Rutherford cables in a channel with a wide range of impregnation materials

S. Otten·A. Kario·W. A. J. Wessel. J. Leferink·H. H. J. ten Kate·M. Daly·C. Hug·S. Sidorov·A. Brem·B. Auchmann·P. Studer·T. Tervoort

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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 Z\"urich. 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.

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S. Otten, A. Kario, W. A. J. Wessel. J. Leferink, H. H. J. ten Kate, M. Daly, C. Hug, S. Sidorov, A. Brem, B. Auchmann, P. Studer, T. Tervoort. 2022-11-18. Training performance of Nb3Sn Rutherford cables in a channel with a wide range of impregnation materials. https://arxiv.org/abs/2211.10213

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