| Autor: |
K. P. Myznikov, A. V. Zlobin, V. P. Kosenko, Nikulin Anatolij D, V. A. Vasiliev, G. K. Zelensky, V. L. Mette, V. Ya. Fil’kin |
| Rok vydání: |
1990 |
| Předmět: |
|
| Zdroj: |
Advances in Cryogenic Engineering Materials ISBN: 9781461398820 |
| DOI: |
10.1007/978-1-4613-9880-6_41 |
| Popis: |
The present note describes the properties of superconducting composite wires consisting of 6·10-6 m Nb — 50% Ti filaments for the UNK magnets. The properties have been studied from the data on commercial batches of wires, 3000 km long and proceeding from the technology of twofold billets (55 × 162). A strand is 0.85·10-3 m in diameter and the copper-to-noncopper area ratio is 1.385/1. The current density in the filaments is (2550 ± 250)·106 A/m2 (B=5 T, T=4.23 K). The Residual Resistivity Ratio (RRR) for the initial copper is ≥ 160 and for the wire of the final size it is ≥ 70. The manufacturing technology for the wire with 6·10-6 m filaments from 0.25–0.3 m billets has been developed. The current density obtained in the strands from large billets is 2800±290 A/mm2. The current rise parameter is I0 ≃ 11 (n ≃ 50). Production of the wire for standard UNK magnets has begun. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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