Simplified Electromagnetic Modelling of Accelerator Magnets Wound With Conductor on Round Core Wires for AC Loss Calculations

We developed a simplified three-dimensional electromagnetic field analysis model for accelerator magnets wound with Conductor on Round Core (CORC) to estimate ac loss of magnets. In our model, the coil winding of the analyzed magnet was separated into several divisions composed of dozens of turns. Then, ac loss density in a division was assumed to be the same as that of a single CORC wire exposed to magnetic field in a representative turn of the division. We carried out the ac loss calculations using the model for a superferric magnet composed of coil wound with CORC wires and iron core.