Abstract
Superconducting (SC) Current Feeder System (CFS) for SST-1 (Steady state superconducting Tokamak was installed and commissioned in 2012. Since then, it has been operating successfully in successive plasma campaigns. The aim of this system is to transfer electric current from power supply at ambient temperature to SC magnets which are at 4.5 K. It consists of 10 kA vapour cooled current leads, Nb-Ti/Cu bus-bars, liquid nitrogen cooled radiation shield and liquid/vapour helium circuits. This system had been operated reliably in different scenario such as initial cool- down, electric current (ramp-up, ramp down and long-time steady state condition), cold with no current and in quench etc. In addition to this, it has fulfilled the long term operation with SST-1 with current flat top of 4.7 kA for more than 20,000 seconds. This paper highlights operational performance along with results in different aspects.
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