Dry-cooled 2G wire SMES coil

Under U.S. Army conract, BTG has developed a large-bore picture-frame HTS superconducting magnetic energy storage (SMES) coil designed to minimize the AC loss (US Army contract) . The coil was successfully ramped to 300 A within 10 seconds. The coil was cooled to 40 K by a two-stage cryo-cooler. Currently, BTG is evaluating AC loss (both magnetization and eddy-current) and its effect on the coil dynamics.
SMES coil being assembled at BTG facility
SMES test
Test of the coil at BTG facility
Assembled SMES system