Time-resolved x-ray-induced conductivity in polyethyleneterephthalate

Abstract

Time-resolved measurements of the conductivity induced in foils of po lye thy Ie net ere phthalate by irradiation with x rays at exposure rates between 280 and 420 Rls and fields between 10 4 and 4.8 X 10 5 V / cm show the occurrence of a maximum of the induced current. This maximum is attributed to the combined effects of trap filling and recombination. The influence of polarization and space-charge effects was proved to be negligible. Current-time curves measured at different exposure rates and field strengths were explained satisfactorily by the rate theory of induced conduction,

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

“…Instead, there was a very slow approach to a maximum. Gross et al [33] were first to report this result, relying on the two-trap model [33,34]. Our studies confirmed this finding but an explanation has been given using the RFV model [32].…”

Theoretical Analysis of the Radiation-Induced Conductivity in Polymers Exposed to Pulsed and Continuous Electron Beams

“…Most publications report RIC data retrieved from experimental results relating to phenomena such as the electron charging of polymer films in which RIC could not be directly measured. Model of choice is a two-trap quasi-band formalism [19][20][21] now extensively used by the ONERA French group of researchers [22,23]. Such data are intended to solve the urgent engineering problems but fail to contribute to an understanding of the detailed nature of the RIC phenomenon in polymers.…”

Chemical aspects of the radiation‐induced conductivity in polymers

“…Its application is quite limited and it is not expected to fit adequately the pulsed RIC experiments or to describe unipolar injection current transients over a wide time interval (the authors themselves acknowledge this [15]). But the basic problem lies even deeper.…”

“…According to the early results of Gross et al [13,141 and also subsequent work [15] it may be supposed that annealing of irradiated samples in air at room temperature would result in substantial recovery of RIC properties. All of the above papers neglect the formation of the radiation traps.…”