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Analysis of Charge Transport and Ionization Effect in Space-Used Polymers Under High-Energy Electron Irradiation

Polymer materials have been tested in the dedicated experimental facility SIRENE (ONERA, Toulouse, France) designed to reproduce the electron energy spectrum met in space in the (0–400 keV) energy range and to perform electric analysis on the materials through dedicated protocols with potential, current, and contactless pulsed-electro acoustic (CNES patent) measurements. A Novel experimental approach shall as well be presented, which allowed bringing into evidence the complex response of polymers under irradiation: polarization and charge differential mobility as well as physical structural changes have been analyzed with these new techniques allowing a better understanding and prediction of charging behavior and radiation-induced conductivity evolution of these polymers under space conditions.