Insulation of highly conductive metal in composite stabilizer for reduction of Hall current across surface
✍ Scribed by H. Kaneko
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 931 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0011-2275
No coin nor oath required. For personal study only.
✦ Synopsis
A Hall current across a composite stabilizer for superconducting cables enhances the effective magnetoresistance of the highly conductive metal. A method for reduction of the Hall current is evaluated in relation to the surface resistance of an aluminium-copper interface in the stabilizer. Since the surface resistance necessary to sufficiently suppress the Hall current is quite high, extra heat generation on current transfer is a great obstacle. Simple insulation is possible only when the sheath and the other conductive layer providing a short circuit for the Hall current are sufficiently thin. A slit in the insulator layer is effective in reducing the contact resistance without releasing a large loop for the Hall current. A possible design is proposed which retains 90% of the conductivity of the original aluminium, even when a thick conductive sheath is used.