Highly time-resolved measurement of quench inception and propagation in ac superconducting wires

Author

Hayakawa, Naoki ; Iwahana, F. ; Chigusa, S. ; Okubo, Hisanori

Author_Institution

Dept. of Electr. Eng., Nagoya Univ., Japan

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

1243

Lastpage

1246

Abstract

In this paper, highly time-resolved and highly sensitive measurements of quench phenomena in ac superconducting wires enabled us to investigate the propagation characteristics of normal zone at the quench inception. Experimental results revealed that the transient propagation velocity of normal zone reached 90 km/sec at 6 /spl mu/sec after the quench-onset of the non-insulated NbTi/CuNi superconducting wires. Furthermore, there could exist an intrinsic length of about 100 /spl mu/m at quench inception and propagation under the criterion of 3.3 /spl mu/V/cm for ac superconducting wires.

Keywords

composite superconductors; niobium alloys; titanium alloys; AC superconducting wire; NbTi-CuNi; normal zone propagation; quench inception; time-resolved measurement; Circuit testing; Fiber reinforced plastics; Impedance matching; Oscilloscopes; Personal communication networks; Superconducting cables; Superconducting coils; Superconducting filaments and wires; Superconducting magnets; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828460

Filename

828460