Radiation-induced conductivity of polymers in different gases

Abstract

The conductivity induced in various polymers by continuous irradiation with x rays was measured under a vacuum and in different gases. Oxygen, nitrogen, and air increased the induced conductivity in polyvinylidene fluoride (PVDF), while argon left it almost unchanged. Argon and air decreased it in Kapton, and air decreased it in Mylar. The saturation current is that stationary value of the current that is obtained if all radiation-generated carriers are removed by the applied field. The measured current amplitude for PVDF in an atmosphere of air of 100% humidity reached almost 50% of that current, while in the other materials it did not exceed 1% of the saturation value. Therefore, carrier removal by the applied field played a negligible role in Kapton and Mylar.

Time-Resolved Radiation-Induced Conductivity of Polyimide and Its Description Using the Multiple Trapping Formalism

“…All this time, leading research groups (Gross et al [13,14], and currently French researchers [15]) adhered to the two-trap RIC model whose parameters were retrieved from experiments which were not intended to directly measure the RIC itself (this last approach was again first proposed by Gross [16,17]).…”

Investigation on the radiation induced conductivity of space-applied polyimide under cyclic electron irradiation

“…On the other hand, RIC would also result in decreasing the charge deposition in the dielectric polymer, thus becoming a mitigation parameter against discharging in the materials [6]. Thus, as an important parameter to evaluate the charge/discharge process of the orbital dielectric in spacecraft, RIC is being widely investigated and applied [7][8][9][10][11][12][13][14][15][16].…”

X-ray radiation-induced conductivity in both ferro and paraelectric phase of P(VDF/TrFE) copolymers

“…The conductivity, in particular, increases with the absorbed dose, this increase depending mainly on the chemical structure of the material [ I ] and on the measuring environment [2]. Different mechanisms based on carriers generation, recombination and trapping at localized states have been proposed to explain the prompt radiation-induced conductivity (RIC), as well as its delayed component (DRIC) [3-51.…”