Speaker
Description
Measurements were performed on a 40 centimeters length of 27-strand cored (F095) and 27-strand RRP non-cored Nb3Sn Rutherford cable which were mounted onto a U-shaped holder. For the cored cable: the core material was 316 S.S, the core was centered and had a width of 10.8mm, the cable was keystoned with a 0.95 degree angle, and the strands were OST-RRP with a 1.0mm OD and 60 filaments. For the un-cored cable: the cable wasn’t keystoned and the strands were OST-RRP with a 1.0mm OD and 60 filaments. All samples were reacted under 20 MPa and one of each sample was epoxy impregnated using standard magnet protocols. Current was injected into a single strand at varying I/Ic and a heat pulse from a carbon paste heater was used to initiate current sharing. Current-distribution was measured using voltage taps. The ICR for the un-cored cable was less than that of the cored cable and the current sharing was greater for the un-cored cable. These measurements were performed as a screening for cable and cable preparation protocol for larger scale measurements.