A 75 kG 41 cm bore continuous disk wound NbTi superconducting magnet
✍ Scribed by D.L. Atherton; R. Stevenson
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 344 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
This paper describes the design, construction, and testing of a large NbTi superconducting solenoid wound by a new technique to allow the convenient insertion of internal cooling passages. This particular solenoid is the outermost section of a high field hybrid magnet; 1 the other components of which will be described in subsequent papers.
Although we use the word new in describing the continuous disk winding technique, it is new only in the sense that it had not previously been applied to superconducting solenoids; the technique being well-known in the electrical industry. This type of winding allows considerable savings in expense, and as we have demonstrated is eminently suitable for the construction of large solenoids.
The present solenoid has a clear bore of 41 cm, an approximate winding length of 56 cm, and an outer diameter of 64 cm. It quenched at a central field slightly above 75 kG; the maximum field at the windings being 82 kG. No transition into a resistive region was observed, the quench being sudden as with a small solenoid. The quench was apparently due to the critical current of the superconductor having been reached, although there was some evidence of wire movement at the quench point. This behaviour is similar to that of the 58 kG 40.6 cm bore solenoid at the Francis Bitter National Magnet Laboratory 2,3 which also quenched rather than showing a transition into a resistive region.