Image Analysis of Nb3Sn Strand For ITER Application: A comparison with SSC Nb-Ti

نویسندگان

  • P. J. Lee
  • D. C. Larbalestier
چکیده

We have quantified the distribution of filament sizes and filament separation in internal Sn type Nb3Sn strand manufactured to ITER specification. In Nb-Ti strand for the SSC we had found a clear relationship between filament cross-sectional uniformity in a given cross-section and the n-value for an entire strand, but for the Nb3Sn we are not able to find one. In these Nb3Sn strands, however, there no clear relationship between n-value and filament uniformity, and there is considerable variation in filament size and spacing within a single cross-section.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Bending-Strain Test Results of ITER Nb3Sn Wires and Preliminary Model Analysis

Bending effects on Nb 3 Sn wires have been investigated to understand the critical current degradation of large Nb 3 Sn superconducting cables, such as the ITER conductors. Characterizations of the critical currents of various Nb 3 Sn wires were carried out by a previously reported pure-bending strand test device using the 20 T, 195 mm Bitter magnet at the National High Magnetic Field Laborator...

متن کامل

The Influence of Nb3Sn Strand Geometry on Filament Break- age under Bend Strain as Re- vealed by Metallography

The non-Cu critical current density of Nb3Sn strands has been pushed towards 3000 A/mm2 (12 T, 4.2 K) by increasing the Sn content and reducing the interfilamentary Cu. We compare the susceptibility to A15 filament breakage (under 0.5% bend strain) of the new high-Jc internal Sn conductor geometries with both high-Jc Powder-in-Tube (PIT) and low hysteresis loss distributed filament ITER designs...

متن کامل

The Interdiffusion of Cu and Sn in Internal Sn Nb3Sn Superconductors

For Nb3Sn superconductors manufactured by the internal Sn process, the most appropriate heat treatment is still a matter of debate. The major complications are the low melting temperature of Sn and the 7 Cu–Sn phases. Each phase has its own diffusivity and atomic volume, which differs significantly from the pure Sn and Cu phases from which the diffusion starts. Void formation near the Nb filame...

متن کامل

Florida electro-mechanical cable model of Nb3Sn CICCs for high-field magnet design

Performance degradation of Nb3Sn cable-in-conduit-conductors (CICCs) is a critical issue in large-scale magnet design such as in the International Thermonuclear Experimental Reactor (ITER) and the series-connected hybrid (SCH) magnets currently under development at the National High Magnetic Field Laboratory (NHMFL). The critical current Ic of Nb3Sn conductors is strongly affected by thermal pr...

متن کامل

Electro-mechanical modeling of Nb3Sn CICC performance degradation due to strand bending and inter-filament current transfer

Please cite this article in press as: Zhai Y. Electr current transfer. Cryogenics (2009), doi:10.1016 Performance degradation of Nb3Sn cable-in-conduit conductors (CICCs) is a critical issue in large-scale magnet design such as the International Thermonuclear Experimental Reactor (ITER) and the seriesconnected hybrid (SCH) magnets currently under development at the National High Magnetic Field ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1998