Minimum quench energies of Rutherford cables and single wires

Author

Gosh, A.K. ; Sampson, W.B. ; Wilson, M.N.

Author_Institution

Brookhaven Nat. Lab., Upton, NY, USA

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

954

Lastpage

957

Abstract

The stability of magnet conductors may be characterized by their minimum quench energy (MQE), i.e. the minimum energy pulse (of small extent and short duration) needed to trigger a quench, Using small graphite paste and epoxy heaters, we have measured the MQE on a broad range of single wires and Rutherford cables as a function of current, field, temperature and pulse duration. Surface heat transfer to the helium plays an important role. For the cables, we find that specially processed ´porous-metal´ cables have by far the highest degree of stability. Measurements are compared with theory.

Keywords

heat transfer; quenching (thermal); stability; superconducting cables; superconducting coils; superconducting magnets; thermal stability; windings; wires (electric); He; Rutherford cables; epoxy heaters; graphite paste; magnet conductors; minimum quench energy; porous-metal cables; pulse duration; single wires; stability; surface heat transfer; Cables; Conductors; Current measurement; Energy measurement; Heat transfer; Magnetic field measurement; Pulse measurements; Stability; Temperature distribution; Wires;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.614663

Filename

614663