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