Class
Article
College
College of Science
Department
Physics Department
Faculty Mentor
J. R. Dennison
Presentation Type
Oral Presentation
Abstract
Test were done to see how radiation-induced defect states affect the electrostatic discharge (ESD) breakdown potential of a material. We selected five different highly disorder polymers (PEEK, PI, FEP, PP, LDEP) due to their different tolerances to radiation. By irradiating samples with 5kGy of penetrating beta radiation in vacuo, we created more localized trap states in the polymers; this is known to increase hopping conductivity. It has also been hypothesized that post-irradiation exposure to oxygen or water in air can repair these defects. ESD can be viewed as an extreme limit of conductivity and therefore is expected to decrease as the hopping conductivity increases. We compared tests of irradiated samples to their non-irradiated counter parts, as well as irradiated samples that had been exposed to air, to determine the how radiation affects the ESD of polymers and if these defects were repaired with atmospheric exposure. The ESD test were done in a parallel plate geometry, where voltage was ramped up at steady rate until a marked increase in current is observed.
Location
Room 204
Start Date
4-11-2019 12:00 PM
End Date
4-11-2019 1:15 PM
Included in
The Effects of Radiation-Induced Defects on the Electrostatic Discharge of Polymers
Room 204
Test were done to see how radiation-induced defect states affect the electrostatic discharge (ESD) breakdown potential of a material. We selected five different highly disorder polymers (PEEK, PI, FEP, PP, LDEP) due to their different tolerances to radiation. By irradiating samples with 5kGy of penetrating beta radiation in vacuo, we created more localized trap states in the polymers; this is known to increase hopping conductivity. It has also been hypothesized that post-irradiation exposure to oxygen or water in air can repair these defects. ESD can be viewed as an extreme limit of conductivity and therefore is expected to decrease as the hopping conductivity increases. We compared tests of irradiated samples to their non-irradiated counter parts, as well as irradiated samples that had been exposed to air, to determine the how radiation affects the ESD of polymers and if these defects were repaired with atmospheric exposure. The ESD test were done in a parallel plate geometry, where voltage was ramped up at steady rate until a marked increase in current is observed.