Preliminary design of a coil system for a large-scale high-intensity magnetic field immunity test platform

Abstract

For the safety and reliability concerns for the Chinese Fusion Engineering Test Reactor (CFETR) and future tokamak devices, a large-scale high-intensity static magnetic field immunity test platform is planned in Chinese Academy of Sciences, Institute of Plasma Physics (ASIPP). This paper presents the preliminary design of the coil system which is used to generate a high-strength uniform magnetic field in a large test zone. At first, a magnetic field homogeneity analysis is performed to determine the structural parameters of the test coil which satisfies the test requirement at a low power loss. The electrical parameters of the coil are then determined based on the structural parameters. In addition, the design of cooling system for the test coil is performed based on theoretical analysis, and then verified by a CFD analysis. The square-shaped designed coil system is able to continuously generate a uniform magnetic field with a field strength over 700 m T in a test zone with a side-length of 2.1 m, which enables the immunity test for large devices at a nominal test level up to 500 m T. It is of great value to ensure the reliable operation of electrical and electronic equipment in CFETR and future devices.