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Title	Critical current density of Nb$_{3}$Sn wires after irradiation with 65MeV and 24GeV protons
Related title	Critical current density of Nb3Sn wires after irradiation with 65MeV and 24GeV protons
Author(s)	Spina, T (CERN) ; Scheuerlein, C (CERN) ; Richter, D (CERN) ; Bottura, L (CERN) ; Ballarino, A (CERN) ; Flükiger, R (CERN)
Publication	2014
Number of pages	4
In:	J. Phys.: Conf. Ser. 507 (2014) 022035
In:	11th European Conference on Applied Superconductivity, Genova, Italy, 15 - 19 Sep 2013, pp.022035
DOI	10.1088/1742-6596/507/2/022035
Subject category	Detectors and Experimental Techniques ; Detectors and Experimental Techniques
Abstract	Industrial Nb$_{3}$Sn wires with Ti and Ta additives (RRP process) and with Ta additives (PIT process) with a diameter of 1 mm have been irradiated at room temperature with protons of 65 MeV and of 24 GeV at various fluences up to 1×1021 p/m2. A steady increase of Jc vs. fluence was observed for all the wires up to the highest fluence. The observed increase of Jc at 4.2K in all wires was quite similar in spite of the very different proton energies. With increasing fluence. the radiation induced pinning force was found to increase. the enhancement Jc/Jco after 5.04×1020 p/m2 reaching 1.4 for Ta and 1.8 for Ti alloyed wires at 10T. The present results were quantitatively analysed by assuming a radiation induced point pinning mechanism in addition to grain boundary pinning. The results are compared with those of an ongoing neutron irradiation study undertaken on the same Nb$_{3}$Sn wires in collaboration with the Atominstitut Vienna. Proton irradiation was found to produce considerably higher damage than neutron irradiation.
Copyright/License	CC BY

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