A proposed measurement of the Reverse Cherenkov Radiation effect in a metamaterial-loaded circular waveguide

Abstract

We have proposed an experiment on verification of the Reverse Cherenkov Radiation effect in a Left-Handed-Material-loaded waveguide. Applications of reverse Cherenkov radiation effect may range from novel higher-order-mode absorbers in microwave and millimeter-wave sources to improved particle detectors for satellite non-proliferation missions. The experimental configuration employs a circular waveguide filled with an artificial metamaterial with simultaneously negative permittivity and permeability, in which the electromagnetic wave with a frequency of 95 GHz will interact with an electron beam. We have demonstrated that for certain values of effective permittivity and permeability only the backward-propagating mode can be exited by the electron beam. In this presentation we will discuss the results of simulations and different manufacturing and assembling techniques for the metamaterial-loaded waveguide.

Experimental Demonstration of Double-Negative Metamaterials Partially Filled in a Circular Waveguide

“…For a dominant mode TM or quasi-TM in the circular waveguide partially loaded by the DNMs, the DNMs must exhibit negative real permittivities in the radial and the axial directions and negative real permeability in the azimuthal direction [30][31][32][33]. Therefore, the DNM-loaded waveguide like a slow-wave structure can propagate the slow-wave.…”

“…The teflon printed circuit boards (PCBs) with unit cells were cut and carefully assembled into the slots of the annular polyimide material with a 3 mm radius hole at the center of the cylinder designed for an electron beam to go through (Figures 1(a), (b)), with one unit cell of the DNMs shown in Figure 1(c). The supporting dielectric material was chosen so that the entire apparatus can operate in vacuum [30]. Finally, the polyimide material with the assembled PCBs was precisely inserted into the circular waveguide, as shown in Figure 2(a).…”

Research Progress in Reversed Cherenkov Radiation in Double-Negative Metamaterials

“…This method allows simulation of different waveguide cross sections, any transverse beam distribution, and any physical dispersion, of the medium. Shchegolkov et al introduced a proposed measurement of the reversed CR effect in a metamaterial-loaded circular waveguide [35]. Currently, much experimental work on directly verifying the reversed CR in DNMs is being carrying out in their group.…”