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The KSTAR PF cryo-circuit is a quasi-closed circulation system in which more than 370g/s of supercritical helium (SHe) is circulated using a SHe circulator. The heated helium from superconducting magnet is cooled through sub cooler (4.3K). The circulator is operated at 4.5K and 6.5bar, and the pressure drop of the circuit is kept at 2bar in order to maintain the supercritical state and circulator...
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