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