Results of the test of a pair of 20 kA HTS currents leads

R. Wesche, P. Bruzzone, C. Fiamozzi Zignani, L. Affinito, S. Chiarelli, R. Freda, A. Formichetti, M. Marchetti, H. Ehmler, J. Heinrich, P. Smeibidl

Research output: Contribution to conferencePaper

4 Citations (Scopus)


A new series connected 25 T hybrid magnet system is being set up by the Helmholtz Zentrum Berlin (HZB) for neutron scattering experiments. CRPP has designed and manufactured a pair of 20 kA current leads for the powering of the outer superconducting coils of the hybrid magnet system. In connection with the test of joints for JT60SA, the current leads were tested at ENEA at low voltage up to a current of 18 kA. The mass flow rates required to cool the current leads at different currents measured in the test are in line with the design calculations. For the sum of the resistances of the warm and cold end copper contacts of the HTS module values of 13 (Lead A) and 11 nΩ (Lead B) were measured. In addition, the helium flow through the heat exchanger part was stopped at 10 and 12 kA to study the behaviour of the current leads in case of a loss of flow. The time elapsed between stopping of the helium mass flow and the initiation of a quench was found to be 117 s (Lead A) and 125 s (Lead B) compared to a calculated value of 86 s. The lower value obtained by the calculation can be attributed to the lower initial temperatures in the experiment. © Published under licence by IOP Publishing Ltd.
Original languageEnglish
Publication statusPublished - 2014
Externally publishedYes
Event11th European Conference on Applied Superconductivity, EUCAS 2013 - , Italy
Duration: 1 Jan 2014 → …


Conference11th European Conference on Applied Superconductivity, EUCAS 2013
Period1/1/14 → …


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Wesche, R., Bruzzone, P., Zignani, C. F., Affinito, L., Chiarelli, S., Freda, R., ... Smeibidl, P. (2014). Results of the test of a pair of 20 kA HTS currents leads. Paper presented at 11th European Conference on Applied Superconductivity, EUCAS 2013, Italy.