The first superconducting final focus quadrupole prototype of the FCC-ee study
Abstract
A single aperture Canted-Cosine-Theta (CCT) quadrupole magnet, made of NbTi superconductors, has been developed for the final focus region of the FCC-ee study. The conductor layout is optimised to mitigate edge effects on one of the two sides of the magnet that typically lead to undesired higher-order multipoles. Experimental results of a prototype, including paraffin wax impregnation and cryogenic temperature measurements, are presented. The magnet exhibits no training behaviour, surpassing the nominal current during the initial ramp. Field quality is excellent, with higher-order multipoles below units, consistent with simulations and room temperature tests. These findings confirm the potential of superconducting CCT magnets to offer compact solutions for applications demanding stringent field quality.
Keywords
Cite
@article{arxiv.2405.20105,
title = {The first superconducting final focus quadrupole prototype of the FCC-ee study},
author = {A. Thabuis and M. Koratzinos and G. Kirby and M. Liebsch and C. Petrone},
journal= {arXiv preprint arXiv:2405.20105},
year = {2024}
}
Comments
The published paper had mistakes. The values in Table 2 for the Warm & Center measurements were wrongly reported. They have been corrected here