AC losses and stability on large cable-in-conduit superconductors

Bruzzone, Pierluigi

doi:10.1016/s0921-4534(98)00469-9

Cited by 10 publications

(1 citation statement)

References 24 publications

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“…However diffusion bondings among chrome-plated Nb Sn strands that occur during the heat treatment process can increase the coupling losses. The diffusion bonding can be broken by mechanical or electromagnetic forces, and it is known that the de-bonding decrease the AC losses during repeated conductor cycling of loading [8].…”

Section: Ac Losses and Ae Energymentioning

confidence: 99%

Acoustic emission during DC operations of the ITER Central Solenoid model coil

Arai

Ninomiya

Ishigohka

et al. 2002

IEEE Trans. Appl. Supercond.

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Acoustic emission (AE) signals from the Central Solenoid (CS) model coil developed in ITER program were studied during direct current (DC) operation. Estimation of the AE energy from the coil indicates close correlation between the AE energy and AC losses in the cable-in-conduit (CIC) conductor. This correlation comes from motions of the cables and de-bonding of strands in the cable-in-conduit (CIC) conductors during repeated charging of the coil. The AE measurements clearly indicated the existence of mechanical disturbances even in the cases where the voltage spikes observed in the balance voltages were comparable to the noise level. In the case of the CS model coil, the locations of the mechanical disturbances could be determined using AE signals in combination with information from voltage spikes correlated with the AE signals.Index Terms-AC loss, acoustic emission, central solenoid model coil, electromagnetic force, ITER.

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Section: Ac Losses and Ae Energymentioning

confidence: 99%