Title :
Stability of a length of cable-in-conduit conductor submitted to a rapidly changing field
Author :
Ciazynski, D. ; Martinez, A. ; Turck, B.
Author_Institution :
Assoc. Euratom-CEA sur la fusion controlee, DRFC/STIF, St. Paul lez Durance, France
fDate :
3/1/1993 12:00:00 AM
Abstract :
The authors present a stability experiment on a NbTi triplet in conduit conductor, 10 m long. This cable was cooled with helium forced flow. An inductive heating system allows deposition of large heat quantities over the whole length of the conductor. In one experiment, the AC losses of the conductor were calibrated by measuring the dissipated energy in a superfluid helium bath, for different magnetic field variations and pulse durations. In another experiment, with supercritical helium, the minimum energy needed to quench the conductor in relation to the transport current, for a given external magnetic field and given refrigeration conditions, will be studied. The results of the first experiment are given, and the second experiment is described.<>
Keywords :
eddy current losses; niobium alloys; quenching (thermal); superconducting cables; superconducting magnets; titanium alloys; AC losses; He forced flow; NbTi triplet; Tokamak magnets; cable-in-conduit conductor; calibration; dissipated energy; external magnetic field; inductive heating system; length stability; pulse durations; quenching; rapidly changing field; refrigeration conditions; superfluid He bath; transport current; Conductors; Energy measurement; Heating; Loss measurement; Magnetic field measurement; Niobium compounds; Pulse measurements; Stability; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
