Publication

Test results of a 10 kA current lead using Ag/Au cladded Bi-2212 tubes

Rainer Wesche
2002
Journal Articles

Abstract

In the frame of the European Fusion Technology Programme, the Forschungszentrum Karlsruhe (FZK) and the Centre de Recherches en Physique des Plasmas (CRPP) are developing a 70 kA current lead for the toroidal field coils of the International Thermonuclear Reactor (ITER-FEAT) using high-temperature superconductors (HTS). As a part of this task, two 5 kA HTS modules made of Bi-2212 bulk material cladded with an Ag/Au sheath have been ordered in the industry. The two HTS tubes were connected in parallel forming a 10 kA current lead that has been tested at CRPP. In addition to the steady state performance, the thermal transient behavior for loss of flow in the gas-cooled copper part has been studied. A special feature of the test equipment are small Hall probes providing information on the current distribution in the two HTS tubes. In spite of a considerably uneven current distribution the current lead could be safely operated in steady state at the nominal current of 10 kA.

Official source

https://infoscience.epfl.ch/entities/publication/afa8464f-05f3-4e5e-9c90-8b4464b57dc2

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Rainer Wesche
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/afa8464f-05f3-4e5e-9c90-8b4464b57dc2

About this result

Related concepts (32)

High-temperature superconductivity

High-temperature superconductors (abbreviated high-Tc or HTS) are defined as materials with critical temperature (the temperature below which the material behaves as a superconductor) above , the boiling point of liquid nitrogen. They are only "high-temperature" relative to previously known superconductors, which function at even colder temperatures, close to absolute zero. The "high temperatures" are still far below ambient (room temperature), and therefore require cooling.

Superconducting wire

Superconducting wires are electrical wires made of superconductive material. When cooled below their transition temperatures, they have zero electrical resistance. Most commonly, conventional superconductors such as niobium–titanium are used, but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.

Fusion power

Fusion power is a proposed form of power generation that would generate electricity by using heat from nuclear fusion reactions. In a fusion process, two lighter atomic nuclei combine to form a heavier nucleus, while releasing energy. Devices designed to harness this energy are known as fusion reactors. Research into fusion reactors began in the 1940s, but as of 2023, no device has reached net power. Fusion processes require fuel and a confined environment with sufficient temperature, pressure, and confinement time to create a plasma in which fusion can occur.

Related publications (32)

Test results of a 10 kA current lead using Ag/Au cladded Bi-2212 tubes

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