Investigation of coherent Cerenkov radiation generated by 6.1 MeV electron beam passing near the dielectric target

Coherent Cerenkov radiation generated by the 6.1 MeV bunched electron beam travelling near dielectric target (teflon) have been investigated theoretically and experimentally. It has been shown that the longitudinal bunch form-factor plays important role in the characteristics of coherent Cerenkov radiation. We have also compared the characteristics of coherent Cerenkov radiation and the ones of coherent diffraction radiation from a metal target in the similar conditions and have shown that coherent Cerenkov radiation is more intensive. These facts make coherent Cerenkov radiation a promising mechanism for a new noninvasive beam diagnostic technique.