Design and Multi-physics Analyses of a Bitter-Type Fast-Cooling Magnet

A compact Bitter-type resistive magnet delivering 5 T in continuous mode and 10 T in pulsed mode with a repetition frequency up to 1 Hz is presented. A multi-physics model integrating electromagnetic, thermal, and mechanical fields is established to guide the design process and validate performance under high stress and thermal load. The electromagnetic and structural designs are thoroughly verified through simulation to ensure operational robustness. Detailed analysis of the thermal characteristics under both steady-state and pulsed current conditions reveals the intrinsic relationship between current distribution and Joule heating, accounting for eddy current effects during pulsed operation. Simulation results confirm the feasibility of the magnet operating reliably at a 5 T steady-state magnetic field and a 10 T pulsed magnetic field with a repetition frequency of 1 Hz. The design achieves enhanced cooling efficiency and field uniformity, demonstrating strong potential for complicated electromagnetic situations and high-power microwave device applications.