Conductivity of polyethylene terephthalate induced by high electron beam current densities

Journal Article · Mon Jun 15 04:00:00 EDT 1987 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.338267· OSTI ID:6804594

Johnson, D J; Kurtz, S R; Sweeney, M A

The radiation induced conductivity (RIC) of polyethylene terephthalate (Mylar) produced by the electron beam from a pinched electron beam diode has been measured experimentally. Data were obtained for 4--10 ns duration electron beam pulses at radiation dose rates up to 4 x 10/sup 16/ rad/s (100 kA/cm/sup 2/ current density). The conductivity is roughly proportional to radiation dose rate up to about 100 Mrad and at higher doses scales approximately with radiation dose to the (3)/(2) power. The experimental data are compared to the predictions of a model of RIC using dispersive electronic transport and bimolecular recombination. The parameters used in the model were obtained from published low dose (<100 rad) time-resolved photoconductivity measurements on Mylar. The data agreed well with the calculations before the onset of significant sample heating (10 Mrad). The highest reported RIC results are compared to the expected results for a weakly ionized plasma experiencing electron neutral collisions. In this case the experimental conductivity is significantly higher than the calculated value.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6804594
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 61:12; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
BEAMS
CHARGED-PARTICLE TRANSPORT
COLLISIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON BEAMS
ELECTRON COLLISIONS
ESTERS
LEPTON BEAMS
MATERIALS
MYLAR
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOTOCONDUCTIVITY
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
PLASTICS
POLYESTERS
POLYMERS
RADIATION EFFECTS
RADIATION TRANSPORT
SYNTHETIC MATERIALS