Speaker
Description
The International Thermonuclear Experimental Reactor(ITER) device should demonstrate the scientific and technological possibility of commercial fusion energy production in large scale in order to solve the worldwide energy problem in the future. The superconducting magnet system is the key part of the ITER device to supply high magnetic fields for confining the deuterium–tritium plasma. The multifilament NbTi wires extruded in a Cu matrix with high quality have been studied to meet the specifications of superconducting strands. This work is presenting the study of signal-to-noise assessment, the electronic transport properties of NbTi wires extruded in a Cu matrix with 0.4mm in diameter and volume ratios of NbTi:Cu = 1.35:1. Normal-state magnetoresistance, I-V characteristics and superconducting state critical currents are thoroughly investigated.
Additionally, the critical current density has been investigated as a function of temperature and field using the expressions for the critical temperature, critical magnetic field and pinning force in NbTi. The measurements undertaken in this research cover a range of the magnetic field between 0T to 7T at temperatures ranging from 1.9K to 10K.
In order to measure the electrical resistance down to cryogenic temperature (2K) a Physical Property Measurement System (PPMS) is being used. The measurements have been done in various magnetic fields, up to 7T. The values of the measured resistance are the bases of the calculating the electrical resistivity, critical current density (Jc) and pinning force (Fp).
Key words: superconducting wires, vortex matter, critical current density, pinning force
| Eligible for student paper award? | No |
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