The testing of the ITER central solenoid conductors last November in the
Conductor samples tested in SULTAN are exposed to magnetic field, current intensity and temperature conditions that are very close to those of the actual ITER environment—with one important difference...
The SULTAN tests consist of submitting the central solenoid conductor samples to several thousand cycles in order to verify that they will withstand the 60,000 or so current pulses that are anticipated during ITER's lifetime. Neil explains: "We cycled two conductor samples 7,000 times. Results were getting better through the first 100 cycles, then went down to the original level over the following 900 and then continued down. It doesn't make sense to ignore the increase and focus on the decrease. The combination shows that this is not just an irreversible degrading of the conductor under the magnetic forces."
SULTAN is the German acronym for SUpraLeiter Test ANlage (Superconductor Test Installation). The facility is located at the Paul Scherrer Institute ( PSI ) in Villigen, Switzerland.
SULTAN's key component is a set of forced flow superconducting coils that generate a magnetic field up to 11T. In the past three years, some 20 ITER conductor samples have been tested in SULTAN