The risk of a superconducting cable exploding

jeffinbath
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If the goal of achieving a room temperature superconducting cable were to fully succeed , would there not always be an explosion risk?
In a future supposed “room temperature” superconducting cable that is carrying a large current (I ), would there not always be a risk of explosion if part of the cable accidentally reached a higher critical temperature so that this part suddenly developed a resistance (R) and all the power would heat the cable following the I2 R law?
 
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This is the case for all superconducting cables, not just room temperature superconductors. Superconducting cables, using both low temperature superconductors like Nb-Ti and high temperature copper oxide based superconductors are a reality today. For the reasons you stated, these always have a copper conductor in parallel with the superconductor to carry the current if the superconductor gets "quenched". You can see that in this diagram of a HTSC cable.

Screenshot 2025-01-20 at 2.04.41 PM.png
 
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From the BCS theory of superconductivity is well known that the superfluid density smoothly decreases with increasing temperature. Annihilated superfluid carriers become normal and lose their momenta on lattice atoms. So if we induce a persistent supercurrent in a ring below Tc and after that slowly increase the temperature, we must observe a decrease in the actual supercurrent, because the density of electron pairs and total supercurrent momentum decrease. However, this supercurrent...

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