Subscale Stress-Managed Common Coil Design

In the context of the High-Field Magnet (HFM) Programme, hosted at CERN, and the Swiss Accelerator Research and Technology (CHART) Initiative, hosted at PSI, the Magnet Development (MagDev) project aims to contribute to the Future Circular Collider (FCC) studies through, among others: (i) research on enabling technologies and (ii) high-field Low Temperature superconducting (LTS) and High Temperature Superconducting (HTS) magnets. After a first experience with the CD1 magnet, a Canted-Cosine-Theta (CCT) Nb
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Sn demonstrator, a roadmap has been established with milestones ranging from enabling technologies tested in powered samples and coils, to ultimate-field and hybrid LTS/HTS short magnets. This article describes the conceptual design of the subscale stress-managed common-coils platform, which is an R&D vehicle for testing enabling technologies, innovative design concepts, and LTS and hybrid LTS/HTS coils. The different aspects of the design will be discussed, including the concept proposed for this platform, magnetic design, coil-ends optimization, and mechanical analysis.