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