Presentation Information
[WB5-01-INV]Recent Progress on Insulated Magnets for Compact Fusion Devices at Commonwealth Fusion Systems
*Rui Diaz-Pacheco1 and Charlie Sanabria1 (1. Commonwealth Fusion Systems (United States of America))
Keywords:
HTS,Compact Fusion
Commonwealth Fusion Systems (CFS) is currently building a compact fusion demonstration device called SPARC. The magnet system of this tokamak is composed of two main magnet technologies: a No-insulation, no-twist (or NINT) approach for the TF magnets, and the more traditional insulated magnet approach for the pulsed magnets of the tokamak: the central solenoid (CS) and the Poloidal Field (PF) coils. To enable these pulsed magnets, CFS has developed a High Temperature Superconductor (HTS) cable-in-conduit conductor called PIT VIPER, a technology which was risk-retired for relevant SPARC operations between 2021 and 2024. Over the past two years, the scale of manufacturing of these magnets has reached a pace necessary for SPARC timelines, including a qualification test of every cable section (in LN2) before integration into a winding pack. CFS has begun the in-cryostat tests of these full magnets in order to qualify their performance for SPARC operation. This talk will describe the test campaign from single cable sections in LN2 to full coils cooled by supercritical helium in our qualification cryostat.