29th Symposium on Fusion Technology (SOFT 2016)

P4.073 Electromagnetic properties of some comercial REBaCuO superconducting tapes considered for magnets of fusion reactors

8 Sep 2016, 14:20

1h 40m

Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Board: 73

Poster E. Magnets and Power Supplies P4 Poster session

Speaker

Milos Jirsa (Institute of Physics ASCR)

Description

Superconducting RE-BaCuO tapes of different suppliers were tested by magnetic induction (vibrating sample magnetometer, VSM) and by current transport techniques. The tests aimed at finding the best candidates for the tape utilization in a new generation of superconducting magnets for fusion reactors. The electromagnetic characteristics of the tapes as a function of temperature, magnetic field, and its angle to the tape plane were investigated. One important question was the impact of neutron irradiation on the tape properties. Therefore, the tests were made before and after a series of neutron irradiations done at LVR-15 fission reactor. The induction and transport tests provide complementary results giving us a deeper insight into the tape behavior. The induction tests enable study of vortex pinning up to very low temperatures and very high magnetic fields, where transport measurements become difficult. The transport tests, though in our case limited to the temperatures around 77 K and magnetic fields to 1 T, give information on the current flow through a long length of the tape and enable reliable tests of the angular dependence of the transport current. In contrast to the induction method, the transport experiment is insensitive to the type of the substrate and tape cover.