Title :
R&D progress on the KSTAR current leads
Author :
Lee, Y.J. ; Park, Y.M. ; Kim, Y.S. ; Jin, S.B. ; Kim, W.C. ; Oh, Y.K. ; Bak, J.S. ; Lee, G.S.
Author_Institution :
Korea Basic Sci. Inst., Daejeon, South Korea
fDate :
6/1/2004 12:00:00 AM
Abstract :
The Korea Superconducting Tokamak Advanced Research (KSTAR) device requires R&D of 20-30 kA overloaded current leads (OCL) for the superconducting poloidal field (PF) magnet. The PF magnet is under zero current state for a very long time, as it is often the case for superconducting magnets used in nuclear fusion. In such case, a simple approach to reduce the cryogenic load would be to design the current leads to be overloaded. Two main problems in this R&D area are the reduction of the cryogenic heat load and the temperature rise due to the current overloading. In this paper, the current overloading tests and results of the numerical analysis for brass leads are presented and discussed in detail.
Keywords :
Tokamak devices; cryogenics; nuclear fusion; superconducting magnets; 20 to 30 kA; KSTAR current leads; KSTAR device; Korea Superconducting Tokamak Advanced Research; brass leads; cryogenic heat load; current overloading tests; nuclear fusion; overloaded current leads; superconducting poloidal field magnet; vapor-cooled current leads; zero current state; Costs; Cryogenics; Helium; High temperature superconductors; Numerical analysis; Research and development; Superconducting magnets; Testing; Tokamaks; Toroidal magnetic fields; Current leads; KSTAR; overloaded current leads; vapor-cooled current leads;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.831103
