Prototype Superconducting Magnets for NAL Beam Lines
- 1 January 1971
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 42 (1) , 79
- https://doi.org/10.1063/1.1659658
Abstract
Two superconducting 20‐kG dipole magnets have been designed and constructed at the National Accelerator Laboratory. They are of a type called ``superferric'' since they consist of an iron yoke and superconducting coil. A 76‐cm‐long model providing a 4×10‐cm aperture operated successfully at 20 kG with a conductor current density of 36 kA/cm2 and a stored energy of 8 kJ.1 A 3‐m‐long prototype requiring 17 kA/cm2 to reach 20 kG in a 4×13‐cm aperture will be tested soon. The iron yokes of these magnets are refrigerated to 4.2 K. Niobium‐titanium multifilament conductor is used. The coils are short free and the magnets can be charged to full field in 5 min or less. A 60‐cm‐long, 4‐kG/cm iron‐free quadrupole with a 15‐cm bore is being constructed. The field is shaped by coil sectors of 18° and 36°. A conductor current density of 21 kA/cm2 is required to achieve a gradient of 4 kG/cm. The stored energy will be about 300 kJ at this gradient.This publication has 0 references indexed in Scilit: