2021/05/31 by Andrey V. Tyukhtin, Sergey N. Galyamin, Viktor V. Vorobev
Engineering · Physics and Astronomy · #Axial symmetry #Charge (physics) #Cherenkov radiation #Conical surface #Crystallography and Radiation Phenomena #Detector #Field (mathematics) #French horn #Geometry #Gyrotron and Vacuum Electronics Research #Optics #Physics #Quantum mechanics #Radiation #Symmetry (geometry) #Terahertz technology and applications #physics.class-ph #physics.optics
paper · pdf · doi:10.1364/josab.439682
openalex created_date 2021/05/10 · arxiv created 2021/07/02 · openalex publication_date 2022/01/13 · arxiv updated 2022/03/02 · openalex updated_date 2026/08/05
Cherenkov radiation (CR) generated by a charge moving through a hollow conical target made of dielectric material is analyzed. We consider two cases: the charge moves from the base of the cone to its top (``straight'' cone) or from the top to the base (``inverted'' cone). Unlike previous papers, a nonzero shift of the charge trajectory from the symmetry axis is taken into account which leads to generation of asymmetric CR. The most interesting effect is the phenomenon of ``Cherenkov spotlight'' which has been reported earlier for axially symmetric problems. This effect allows essential enhancement of the CR intensity in the far-field region by proper selection of the target's parameters and charge velocity. Here we describe the influence of charge shift on CR far-field patterns paying the main attention to the ``Cherenkov spotlight'' regime. Influence of variation of the charge speed on this phenomenon is also investigated.