Conveners
Tue-Af-Or18: AC Loss in Cables and Coils
- Daniel Ciazynski (CEA-IRFM)
- Milan Majoros (The Ohio State University)
Magnetization and AC loss measurements were performed on cables made from HTS coated conductors. Coated conductor-based CORC, Twist stack, and Roebel Style cables were measured and were compared. In a first set of runs, magnetization was measured out to 1.4 T at 4 K, and was compared for the various cable options with reference to the field at injection for particle accelerators. Additionally,...
To achieve the required current capacity, superconducting cables are composed of numerous HTS tapes. In particular for application in fusion, those conductors have to operate in alternating current and magnetic fields, leading to AC loss and current redistribution. Besides the dimensions and geometry of the composed cable, an important parameter for the mentioned phenomena is the contact...
The large magnetization caused by shielding current in coated conductors can deteriorate the field qualities of magnets. One of the counter measures of this large magnetization is the striation of a coated conductor to divide its superconductor layer into multifilaments. A striated coated conductor was fabricated by Furukawa Electric Co., Ltd. and SuperPower Inc. The superconductor layer of a...
In order to use a REBCO coil with conduction cooling configuration, AC loss of the coil should be quantitatively predicted and designed under the operating conditions. REBCO-coated conductor is a tape shape and is suited to be composed of a stack of single pancake coils for generating high magnetic field. And various research groups measured and evaluated the ac loss of the REBCO tape;...
Dissipation of energy in a superconducting coil generating magnetic field that varies in time could be evaluated locally as the product of electrical field and current density. The effect of electric field exerting force and accelerating the electric charge carriers that transport the current is commonly incorporated into AC loss calculation by inserting a realistic current-voltage dependence...