Speaker
Description
We present the test of a superconducting accelerator magnet producing combined dipole and quadrupole fields in a 90 mm x 40 mm elliptic aperture. The 0.6 m long magnet consists of two Nb-Ti canted-cosine-theta (CCT) winding layers impregnated with paraffin wax and assembled into an iron yoke and aluminum shell-based structure. We share the quench training and field performance at 4.2 K, discussing the results in the context of the short-sample current and peak conductor field of 12.0 kA and 5.88 T respectively. At this short-sample limit, the dipole and quadrupole field components are 4.36 T and 31.4 T/m, leading to peak field of 5.8 T in the aperture. Following the quench performance, we share field quality measurements taken in the elliptic aperture with a rotating field coil designed for combined function magnets. This field quality is compared to 3D modeling including saturation effects in the iron yoke and to the requirements for accelerator applications. Finally, we will discuss plans for future testing and next steps in the program to extend the magnet concept to Nb3Sn conductor for higher field.
This work was supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under contract No. DE-AC02-05CH11231.