Investigation of Electro-physical and Physical-mechanical Properties of HTS 2G Tapes

AbstractHigh temperature superconducting tapes of 2nd generation (HTS 2G) are being manufactured by several companies worldwide, which use different methods of fabrication of superconducting layers that affect the behaviour of HTS 2G tapes in actual practice. This paper presents the results of the study of HTS 2G tapes delamination process, the influence of alternating temperature impacts on critical current and the behaviour of current carrying capacity of HTS 2G tapes in external magnetic fields. The abovementioned problems can arise in almost any case of designing devices based on HTS 2G tapes. Furthermore, the developed measuring techniques are very important for controlling of output parameters of HTS 2G tapes that are to be manufactured in NRC “Kurchatov institute”

COMPOSITION, STRUCTURE AND CURRENT CARRYING CAPACITY OF Nb3Sn PHASE IN MULTIFILAMENT SUPERCONDUCTORS

Nous avons étudié les procédés de formation et les propriétés caractéristiques de la composition et de la structure du Nb3Sn formé dans des supraconducteurs multifilamentaires lors d'un recuit entre 700-820°C pendant 200 h. La capacité de transport de courant du matériau cité ci-dessus a été étudiée dans un champ < 18 T. Il a été établi que la meilleure densité de courant critique du Nb3Sn inter-métallique dans des champs magnétiques faibles et élevés est obtenue avec des temps de recuit différents.The study was made into processes of formation and characteristic properties of the composition and structure of Nb3Sn formed in multifilament superconductors during annealing within 700-820°C for up to 200 h. The current carrying capacity of the above materials was studied in the field of < 18 T. It is established that the best critical current density of intermetallic Nb3Sn in low and high magnetic fields is achieved through dissimilar annealing schedules

Independent isotopic yields in 25 MeV and 50 MeV proton-induced fission of natU

Independent isotopic yields for elements from Zn to La in the 25 MeV proton-induced fission of natUnatU were determined with the JYFLTRAP facility. In addition, isotopic yields for Zn, Ga, Rb, Sr, Zr, Pd and Xe in the 50 MeV proton-induced fission of natUnatU were measured. The deduced isotopic yield distributions are compared with a Rubchenya model, the GEF model with universal parameters and the semi-empirical Wahl model. Of these, the Rubchenya model gives the best overall agreement with the obtained data. Combining the isotopic yield data with mass yield data to obtain the absolute independent yields was attempted. The result depends on the mass yield distribution.peerReviewe