35.4 T field generated using a layer-wound superconducting coil made of (RE)Ba2Cu3O7-x (RE = Rare Earth) coated conductor

摘要

To explore the limits of layer wound (RE)Ba2Cu3O7-x (REBCO, RE = Rare Earth)coils in a high magnetic field environment > 30 T, a series of small insertcoils have been built and characterized in background fields. One of the coilsrepeatedly reached 35.4 T using a single ~100 m length of REBCO tape wet woundwith epoxy and nested in a 31 T background magnet. The coil was quenched safelyseveral times without degradation. Contributing to the success of this coil wasthe introduction of a thin polyester film that surrounded the conductor. Thisapproach introduces a weak circumferential plane in the coil pack that preventsconductor delamination that has caused degradation of several epoxy impregnatedcoils previously made by this and other groups.