Speaker
Description
We present our current progress towards the development of a novel RF source
utilizing a low-loss, dispersion engineered, artificial EM material, based upon
a complementary split ring resonator that supports both forward and
backward wave propagation. The frequency dispersive media was designed
numerically to yield specific constitutive parameters, determined using a
Nicholson Ross Wier based retrieval approach. The media is designed to
reduce EM wave propagation to approximately 0.2 c, facilitating interaction with a 20 keV electron beam.
To explore the beam - wave the interaction a cylindrical waveguide loaded with the artificial material is considered and modeled using
the FDTD-PIC simulation software MAGIC. Where a 20 keV, 0.5 A electron beam
acted upon by a 0.3 T external magnetic field propagates on axis, to excite
a wave in the media. The simulation results demonstrate Beam-Wave energy transfer, producing a narrow band EM wave at 8.45 GHz. Results of
the frequency spectrum and the power generated are presented, along with
eigenmode simulation results for both the empty and the loaded system. FEM simulations show the artificial material is capable of supporting a 1 KW
continuous wave propagating through the media.
