Test Results for RD3c, A Nb3Sn Common-Coil Racetrack Dipole Magnet

Conference · Thu Aug 01 04:00:00 EDT 2002

OSTI ID:1011742

Lietzke, A F; Caspi, S; Coccoli, M; Dietderich, D R; Ferracin, P; Gourlay, S A; Haffalia, R R; Chiesa, L; McInturff, A D; Sabbi, G; Scanlan, R M

The Superconducting Magnet Group at Lawrence Berkeley Laboratory has been developing racetrack technology for economical, high-field accelerator magnets from brittle superconductor. Recent tests have demonstrated (1) robust, reusable, double-layer, flat racetrack, wind and react Nb{sub 3}Sn coils, (2) a reusable, easily assembled, coil-support structure that can minimize conductor movement, and (3) 15T dipole fields, with no degradation. RD3c is our first attempt to compare measured and calculated field harmonics. A single-layer, Nb{sub 3}Sn, flat racetrack inner-coil was wound on both sides of a bore-plate, and then reacted and potted (as previously). Hard spacers were wound into the inner coils, to adjust the geometric field harmonics, and identify any problems from hard-spacers. Harmonic measurements with a warm rotating coil also required a considerably thicker bore-plate (for the 35mm OD anti-cryostat). The inner coil-module was sandwiched between two existing outer-coil modules, and pre-stressed within the reusable yoke and shell loading structure. The magnet's performance is discussed, and compared with calculations.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Accelerator& Fusion Research Division
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1011742
• Report Number(s): LBNL-49916
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
ACCELERATORS
DIPOLES
HARMONICS
LAWRENCE BERKELEY LABORATORY
MAGNETS
PERFORMANCE
SPACERS
SUPERCONDUCTING MAGNETS