Abstract
We present in this work the experimental investigation of the interaction of relativistic electron field with wire metamaterial. The measurements of the spectral-angular characteristics of coherent radiation were done in millimeter wavelength region in far-field zone at the relativistic electron beam with energy of 6 MeV. Used target represent the right triangular prism that consist of periodic placed copper wires. We showed that bunched electron beam passing near wire metamaterial prism generates coherent Cherenkov radiation. Spectral angular characteristics of radiation from the wire target were compared with the characteristics of Cherenkov radiation generated in similar experimental conditions in a dielectric target (Teflon prism) that has the same form and sizes.
Highlights
The different types of metamaterials have been intensively studied in recent years [1,2,3,4]
Cherenkov radiation that is generated in the result of interaction of a relativistic charged particle with left-handed materials (LHM) is propagated in backward semi-sphere
We present the results of experimental investigation of relativistic electron field with wire metamaterial and dielectric target in similar experimental conditions
Summary
The different types of metamaterials have been intensively studied in recent years [1,2,3,4]. Metamaterials represent composite periodic structures that consist of scattering elements whose dimensions are much smaller than wavelength of the electromagnetic field. The examples of such media can be left-handed materials (LHM), wire metamaterials and other various artificial structures whose electromagnetic properties are not observed in natural materials. Cherenkov radiation that is generated in the result of interaction of a relativistic charged particle with LHM is propagated in backward semi-sphere. It is so-called backward Cherenkov radiation [5,6,7,8].
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