Abstract

Stable operation of superconducting magnets de- pend critically on the balance of heat deposition rate versus heat extraction rate by the cryo-coolant. Thus, the mass flow rate of the coolant in case of force-flow cooled supercon- ducting magnet with Cable-In-Co-nduit-Conductor (CICC) construction becomes an important factor for optimum sta- bility of magnets. The Toroidal and Poloidal Field mag- nets of Steady-state Superconducting Tokamak-1 (SST-1) is made of superconducting CICC with a void fraction of 40 % ± 2 %. For adequate cooling of magnets, supercritical helium at 4 bar and 4.5 K is forced-flown through the voids. Effect of temperature on mass flow rate and pressure drop in

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