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Super conducting wires and magnets for very high field applications

Study of important parameters for development of technology
of high field superconducting magnets. The long term goal is
the development of high magnetic field superconducting coils
in the range above 20 tesla.

The present project originates from an R & D programme at the UNIVERSITE DE GENEVE (SWITZERLAND), the INSTITUTE OF APPLIED PHYSICS (GAP) and the Department of Condensed Matter Physics (DPMC) in collaboration with METALLWERK PLANSEE, Reutte (AUSTRIA) and later with SPECTROSPIN AG (Fallenden) and PROMOGAP, Geneve, both in SWITZERLAND. The High Magnetic Field Laboratory of the UNIVERSITY OF NIJMEGEN acquired EUREKA status at the end of July, 1987 and participates in this project since September 15th, 1987. This brought also SMIT DRAAD, Nijmegen, a company which is specialised in the electrical insulation of normal and superconducting wires, as a new industrial participant. Early in 1987, a French group first negotiated for a participation in this project. A Memorandum of Understanding was drawn up between the interested parties at the end of January, 1988. On November 15th, 1989 a General Cooperation Agreement entered into legal force. This document has been negotiated and signed by all nine participants in this project. The goal of the R & D programme is the development of a new superconducting wire for the generation of very high steady state magnetic fields. On a long term scale the participants in this project plan to achieve magnetic fields in the order of 20 Tesla and above. The main effort is concentrated on PbMo6S8, a member of the family of Chevrel phases. However, all participants in this project agreed on February 12, 1987 to also study the recently discovered high temperature oxid-superconductors in a basic research programme. Due to the fact that Chevrel phase wires are manufactured by powder metallurgy, the quality of the starting powder has an influence on the performance of the wire. One of the essential parts of the project is the synthesis, the characterization and optimization of the starting Chevrel phase powder. After the wire drawing the obtained wires are investigated systematically and relationships between the properties of the starting powder and the wires are studied. At present (end of 1991) two different wire drawing technologies are available. Using a copper/niobium matrix, the wire may be manufactured at room temperature. A disadvantage of this technology is that heat treatments are limited by a chemical reaction between niobium and the superconductor. The other available technology used a stainless steel/molybdenum matrix where the wire drawing must be done at elevated temperatures. Finally the winding of test coils, primarily for the characterization of the wires over greater lengths, is planned.
Start date: 
01-07-1986
Project Duration: 
123months
Project costs: 
8 000 000.00€
Technological Area: 
Market Area: 

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.