Design and Development of a Field Emission Based Magnetron Using 3-D Conformal Finite-Difference Time-Domain Particle-in-Cell Simulations for Industrial Applications

초록

This study advances the research and development of field emission-based rising-sun magnetrons by transitioning from 2-D particle-in-cell (PIC) simulations to a fully 3-D design using conformal finite-difference time-domain (CFDTD) PIC methods. The 2-D CFDTD PIC simulations, which achieved an efficiency of ~80% with a linear anode current density of 75.67 A/m under an applied voltage of 5.2 kV and a static magnetic field of 0.235 T, form the foundation for the 3-D implementation. The same voltage and magnetic field conditions are applied to the 3-D model, which incorporates a coaxial output port to realize the optimized 2-D design in a realistic 3-D geometry. The rising-sun magnetron, featuring a cavity height of 10 cm, has been adapted for operation at the target frequency of 2.45 GHz. This work demonstrates the feasibility of transitioning from 2-D to 3-D designs while highlighting practical advantages of incorporating coaxial output port and reducing fabrication complexity.

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