Large scale applications of superconductivity

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 301 KB
• Volume: 14
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(74)90137-4

✦ Synopsis

On 5-14 September, NATO organized an Advanced Study Institute on large scale applications of superconductivity and magnetism at VaUe d'Aosta in Italy. At one session delegates from various countries gave a review of developments of large scale applications of superconductivity in their own country. A summary of the reviews given by Dr G. Bogner of West Germany and K. Yasukochi and T. Ogasawara of Japan is presented below.

Germany Materials

All large scale applications of superconductivity are reliant on the development of suitable superconducting materials. Several companies in Germany produce or are at present developing these materials.

Vacuumschmelze most popular superconductor, Nb 50% Ti, has a current density of up to 2.5 x l0 s A cm -2 at 5 T. Large scale applications include the Big European Bubble Chamber Magnet, the Pluto Magnet at DESY, and a SteUarator prototype magnet at MPI Garching.

Another company in this field Krupp-Forschung are at present carrying out a development programme on superconducting alloys but commercial materials are not yet available.

At Siemens vapour-deposited Nb3Sn ribbon developed over the past few years has been used in high field test magnets withB > 10 T. Present research work is concerned with A15 superconductors Nb 3 (A1 Ge) and NbaA1. Critical temperatures of 18.5 K for Nb3Al and 19.5 K for Nb3 (Al Ge) have been obtained. In addition Siemens in collaboration with Vacuumschmelze are developing Nb3Sn and V3Ga multifdament conductors in a matrix of copper-based alloy. Critical overall current densmes attained so far with these conductors are about l0 s A cm -:~ at 5 T.