Thermal conductivity of mica/glass insulation for impregnated Nb3Sn windings in accelerator magnets
✍ Scribed by Andries den Ouden; Herman H.J. ten Kate
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 301 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
The thermal conductivity of a combination of glass fibre tape and mica/glass sheet as insulation for superconducting Nb 3 Sn cables for a fully impregnated accelerator dipole magnet has been investigated. At 4.3 K a value for the thermal conductivity coefficient of 45 mW/m/K has been found, which is a considerable improvement compared to values of 5-15 mW/m/K if only mica/glass sheet is applied. An improved resin penetration to both sides of the mica/glass sheet not only increases the thermal conduction and therefore the stability margin of the superconductor, but it also enhances the shear strength of the insulation layer.