Feasibility study of Nb3Al Rutherford cable for high field accelerator magnet application

Conference · Tue Aug 01 04:00:00 EDT 2006

OSTI ID:897564

Yamada, R; Kikuchi, A; Ambrosio, G; Andreev, N; Barzi, E; Cooper, C; Feher, S; Kashikhin, V V; Lamm, M; Novitski, I; Takeuchi, T; Tartaglia, M; Turrioni, D; Verweij, A P; Wake, M; Willering, G; Zlobin, A V

Feasibility study of Cu stabilized Nb{sub 3}Al strand and Rutherford cable for the application to high field accelerator magnets are being done at Fermilab in collaboration with NIMS. The Nb{sub 3}Al strand, which was developed and manufactured at NIMS in Japan, has a non-copper Jc of about 844 A/mm{sup 2} at 15 Tesla at 4.2 K, a copper content of 50%, and filament size of about 50 microns. Rutherford cables with 27 Nb{sub 3}Al strands of 1.03 mm diameter were fabricated and tested. Quench tests on a short cable were done to study its stability with only its self field, utilizing a high current transformer. A pair of 2 meter long Nb{sub 3}Al cables was tested extensively at CERN at 4.3 and 1.9 K up to 11 Tesla including its self field with a high transport current of 20.2 kA. In the low field test we observed instability near splices and in the central region. This is related to the flux-jump like behavior, because of excessive amount of Nb in the Nb{sub 3}Al strand. There is possibility that the Nb in Nb{sub 3}Al can cause instability below 2 Tesla field regions. We need further investigation on this problem. Above 8 Tesla, we observed quenches near the critical surface at fast ramp rate from 1000 to 3000 A/sec, with quench velocity over 100 m/sec. A small racetrack magnet was made using a 14 m of Rutherford cable and successfully tested up to 21.8 kA, corresponding to 8.7 T.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 897564
• Report Number(s): FERMILAB-CONF-06-294-TD
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
Accelerators
CABLES
CERN
COPPER
FERMILAB
FIELD TESTS
INSTABILITY
MAGNETS
STABILITY
SUPERCONDUCTIVITY
TRANSPORT
UNINTERRUPTIBLE POWER SUPPLIES
VELOCITY