The interaction of charged particles with carbon nanotubes (CNTs) and graphene layers can induce plasmonic modes in the two-dimensional electron gas that forms these structures. Recent studies suggest that plasmonic excitations could provide a novel approach to short-wavelength, high-gradient particle acceleration, potentially revolutionizing current acceleration techniques and fostering advancements in high-energy physics and related fields. In this talk, we will study the wakefields generated by a charged particle moving along a CNT and parallel to graphene layers. Using a theoretical framework based on a linearized hydrodynamic model combined with Poisson’s equation, we will describe the electronic excitations produced by a rapidly moving point charge. This model treats surface plasmonic excitations by representing the electron gas as a two-dimensional plasma, incorporating additional terms in the fluid momentum equation that account for specific solid-state properties. We will derive analytical expressions for the excited wakefields, which, in the case of multi-walled CNTs, can be associated with resonant frequencies obtained from the dispersion relation. Furthermore, we will analyze how wakefield characteristics vary with model parameters, including particle velocity, CNT and graphene sheet positions, friction effects, and surface density.
Benedito Donizeti Botan-Neto
Jose Luis Rodrigo-Ramon