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