Training in test samples of superconducting cables for accelerator magnets

Author

Ghosh, A.K. ; Garber, M. ; Robins, K.E. ; Sampson, W.B.

Author_Institution

Brookhaven Nat. Lab., Upton, NY, USA

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1831

Lastpage

1834

Abstract

In the critical current measurement of some high-current NbTi cables, the samples have to be `trained´ by repeated quenching to obtain a usable voltage-current curve for I_c determination. This training behavior is most pronounced when the applied field is perpendicular to the wide face of the conductor and is strongly dependent on the copper-to-superconductor ratio and the clamping pressure. Data are given for SSC (Superconducting Super Collider) prototype cables as well as for HERA production conductors. Although a quantitative understanding of the experimental data is still lacking, some speculations regarding stability are presented

Keywords

beam handling techniques; critical currents; electric current measurement; niobium alloys; particle accelerators; superconducting cables; superconducting magnets; titanium alloys; Cu-superconductor ratio; HERA; NbTi cables; SSC; Superconducting Super Collider; accelerator magnets; clamping pressure; critical current measurement; experimental data; hadron electron ring accelerator; high-current NbTi cables; production conductors; prototype cables; repeated quenching; stability; superconducting cables; test samples; training behavior; usable voltage-current curve; Clamps; Conductors; Critical current; Current measurement; Life estimation; Niobium compounds; Superconducting cables; Testing; Titanium compounds; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92659

Filename

92659