Energy Storage, Compression, and Switching in a Theta-Pinch Fusion Test Reactor
A new 488 MJ superconducting magnetic energy storage and transfer system is being proposed for a Scyllac Fusion Test Reactor. The 1280 module system uses vacuum interrupters to switch 26 kA storage currents in 0.7 ms through a capacitive transfer circuit at 60 kV to the compression coils in the machine. Many of the components of the system have been built and tested and a prototype section of the machine is planned. Prototype coils with 381 kJ at 26 kA currents will be built by industry using advanced superconducting wire. The wire uses a Cu and Cu-Ni matrix around filaments of Nb-Ti to minimize eddy current losses. These wires are presently used in a 10 kA braided conductor for 300 kJ pre-prototype coils, and can withstand field changes of ~ 107 gauss/sec without inducing normal transitions. Three such 300 kJ coils are being constructed in industry for the LASL program.
KeywordsCapacitor Bank Eddy Current Loss Apply Superconductivity Load COIl Magnetic Energy Storage
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