Design and simulation of CW tunable gyrotron using PBG cavity as its RF circuit

Abstract

In this paper, the design and Particle-in-Cell (PIC) simulation of a THz gyrotron using Metal Photonic Band Gap (MPBG) cavity as its RF circuit for continuous wave operation in DNP/NMR is presented. The MPBG cavity is designed for the confinement of operating TE72-like mode at 260 GHz. The PBG gyrotron is hot simulated for its beam wave interaction behavior using a 3D commercial PIC code. The simulation predicted a continuous wave (CW) RF output power of ∼121 W at ∼260 GHz in TE72 mode with a wide tunable bandwidth of ∼1.5 GHz for the axial mode index 1 to 4. The magnetic field has been optimized as ∼9.56 Tesla. © 2018 IMA.