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Development of Super Fine Strand Nb3Al Cable for SuperKEKB Superconducting Sextupole Magnet System
Along the beamlines of the SuperKEKB main rings, 218 conventional sextupole magnets are installed, and they are used for tuning the chromaticity of the accelerator rings. Especially, 16 sextupole magnets in the beam straight lines in the Tsukuba area are quite essential for the Crab Waist beam colliding. To make the beam-tuning process finer, we are studying the superconducting sextupole magnet system with three types of corrector magnets. From the operation temperature of the system, the A15 compound superconductor is chosen as the cable material, and the development of the react and wind coil production has been tried with the Nb3Al cable. The Nb3Al super fine strand superconducting cable for the corrector magnets was manufactured, and its superconducting characteristics are being studied. In this paper, as the first test result of the development, the critical current characteristics of the straight cable as variables of temperature and magnetic field are reported. As a result, the critical current of the Nb3Al cable was higher than the design values for the corrector magnets, and this level of cable performance also indicates the potential for the cable being used for the main sextupole magnet.
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- 06/03/2023
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- © 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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- Accepted manuscript
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- 30/01/2024
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