Thermal insulation for the superconducting cable
β Scribed by N. Higuchi; N. Natori; N. Itch
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 164 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0011-2275
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π SIMILAR VOLUMES
The simultaneous application of the design voltage (20 kVrms) and current (2 kArms) to ethylenepropylene-rubber (EPRI-insulated superconducting cable, cooled by liquid helium, was successfully carried out. The superconductor was a niobium layer clad on a copper pipe. The EPR insulation was extruded
The stability of a superconducting cable is investigated by measuring the heat flux cooled by liquid helium. It was found that the heater power needed to make the cable go to the normal state can be given by PH = Ps + Eo (A mrn/T, where, Ps is the steady heater power needed to make the cable go norm
## An analytical approach is presented for the determination of the propagation of thermal waves in helium cooled superconducting cables caused by a disturbance resulting in the energy deposition over a finite length of the conductor. The problem is reduced to the solution of an integral equation fo
Using an approximation to the conduction fluid equations, a solution is given based on direct integration. The solution is used to establish a relationship between quench velocity and conductor length in a cable-in-conduit-type configuration.
Prototypes of a helium-insulated superconducting cables, with conductors and dielectric of realistic geometry and construction, have been subjected to impulse voltage tests in a superconducting cable test facility. Five metre lengths of a co-axial pair of tubular conductors, separated by insulating