The stability behaviour of a Cu-stabilized NbTi-multifilamentary conductor under different cooling conditions
✍ Scribed by P. Turowski
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 714 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
The electrical stability and quench propagation were investigated for a superconductor under different cooling conditions. The cooling conditions were cooling in a LHe bath with and without a convective flow and with supercritical helium at 6 bar with and without a forced flow. The results show that bath cooling with an excited convective flow at the bare conductor surface transverse to the electrical current is most effective in magnetic fields above 6 T. All the other cooling modes were dominated mainly by the temperature gradients between the conductor and the coolant, leading to smaller effective heat flow rates and therefore to smaller recovery currents. The longitudinal velocity of a normal conducting zone shows that for fast events like the propagation velocity only the heat capacity of the attached liquid helium contributes to the cooling.