Electromagnetic particle-in-cell simulations of dielectric multipactor

The multipactor of dielectric window is studied by electromagnetic Particle-In-Cell (PIC) simulations. Firstly, simulations show that the multipactor of dielectric window on the upstream side is more serious than that on the downstream side. Secondly, the multipactor of dielectric window on the upstream side in microwaves of TEM mode is simulated in more details, and compared to our theoretical results. It is found that the multipactor is more serious than Kishek's model in the regions of weak dc electric fields and strong rf electric fields, which leads the vanish of upper boundary. Thirdly, the dielectric multipactor in microwaves of TE modes is simulated. It is found that the upper boundary reappears when the rf frequency of TE modes trends to the cutoff frequency of waveguide.