A superconducting iron-dominated quadrupole for CEBAF

Conference · Wed Mar 01 04:00:00 EST 1989

OSTI ID:840703

Harwood, Leigh; Lassiter, Steve; Tuzel, Walter

The current design for the high-resolution spectrometers at CEBAF (Continuous Electron Beam Accelerator Facility) requires a front quadrupole that has a gradient x length of 6.8 T with a ''good field'' aperture (1 x 10{sup -3} uniformity in gradient) of 16 cm radius. A room-temperature design was found too power hungry and interfered with the beam. Engineering and construction of a small cos 2&thetas; magnet was considered to be quite expensive. A Panofsky design was not considered due to the extreme sensitivity of the field quality to errors in conductor placement. A conformal mapping of a window-frame dipole into quadrupole geometry worked well. A conceptual design has been developed with the following characteristics: physical length (total)=1.2 ; iron length=1.1 m; iron outer dimensions=54 cm x 80 cm; peak gradient=6.2 T/m; pole radius=20 cm; ''good field'' radius=16 cm; coil peak field=1.5 T; conductors=1 mm diameter; Cu/NbTi=7:1; current=400 A; turns=250/quadrant; and stored energy=50 kJ

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 840703
• Report Number(s): CEBAF-PR-88-35; DOE/ER/40150-3448
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
APERTURES
CONFORMAL MAPPING
CONSTRUCTION
DESIGN
DIPOLES
ELECTRON BEAMS
GEOMETRY
IRON
MAGNETS
QUADRUPOLES
SENSITIVITY
SPECTROMETERS
SUPERCONDUCTIVITY