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Description
The Magnet Development (MagDev) laboratory at the Paul Scherrer Institute (PSI) has designed and successfully manufactured the first subscale stress-managed common coil magnet. The magnet was tested at CERN and reached 98% of its short sample current. Following the high-field magnet roadmap of the Swiss Accelerator Research and Technology initiative (CHART), a new magnet was assembled after replacing two of the four Nb3Sn coils and manufacturing four copper-based coils. These coils are part of the Energy Shift with Coupling (ESC) quench protection method.
The ESC system uses normal-conducting auxiliary coils that are strongly magnetically coupled with the magnet’s superconducting coils for protection. When a quench is detected, a current is discharged through the auxiliary coils, leading to a rapid shift of the magnet's energy from the Nb3Sn coils to the copper-based coils. This process results in high transient loss within the superconductor, which facilitates quick quench initiation and magnet current discharge.
This work presents the manufacturing of the copper-based coils, magnet assembly, and test results of the subscale SMCC2, and explores the comparison between these results and those obtained from subscale SMCC1.
