Polarity reversal Pulsed electro acoustic method Transport Aluminum oxide Partial discharges Dielectric materials Cable Electrical insulation Charge d'espace Cross-linking by-products Plasma process LIMM LDPE AgNPs Fluid model Ac electric field Ageing Proteins AFM Plasma processes Electron-beam irradiation Conductivity Silicon compounds Electrical conductivity Atomic force microscopy EFM Acoustic wave propagation Luminescence E-Beam Dielectric charging Dielectric films Charge injection Electric potential PEA Electroluminescence Electric field Interfacial charge Field distribution KPFM C-AFM Mechanical properties FTIR Dielectrics Electrostatics Power cables DC stress HVDC cable Electrical engineering Radiation effects Bipolar charge transport model Electron beams Rotating machines Epoxy resin Space charge Electronic irradiation Polymer Electrodes Charge transport model Polarization Dielectric strength Modeling Cathodoluminescence Silver nanoparticles Charge measurement FLIMM Electrical ageing Electromechanical stress Silver PTFE XLPE HVDC Accumulation characteristics Electron emission Insulation Conduction current Permittivity Nanostructured dielectrics Electrical properties Dielectric Current measurement Charge trapping Thin films Polyimide Thermal aging Dielectric properties Optimization SiO2 Polymeric insulation Dielectric material Charge transport Breakdown Cross-linked polyethylene Electron beam DC conductivity Polymers Insulating polymers Polypropylene Polyethylene Electric field distribution Cumyl alcohol