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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Theoretical Analysis and Experimental Verification of Polytetrafluoroethylene Surface Flashover from Electrostatic Electromagnetic Pulse Field

Yan Zhang, Xin Zhao, Hsiung-Cheng Lin, Xianghu Ge, and Lu Zhang

(Received November 3, 2021; Accepted February 21, 2022)

Keywords: PTFE, electromagnetic induction, surface flashover, electrostatic discharge, electrostatic electromagnetic pulse

The insulating material flashover induced by an electrostatic electromagnetic pulse radiation field in a complex electromagnetic environment is a big concern in spacecraft surface materials. Polytetrafluoroethylene (PTFE) is themost often used insulation material in spacecraft. For this reason, the secondary electron emission avalanche (SEEA) model is proposed for the theoretical analyses of and experimentson the PTFEsurface flashover induced by an electrostatic electromagnetic pulse radiation field. We use the current probe sensor to measure the induced flashover current waveform on the grounding wire and combine the probability of the electrostatic electromagnetic-pulse-induced flashover under different electrode voltages and electrostatic discharge (ESD) simulator output voltages. First, the SEEA theory is established considering the flashover voltage without an external electrostatic electromagnetic pulse field. The flashover voltage is then applied to the needle-plate electrode, and the distorted electric field is formed at the three nodes of the electrode–PTFE–air. Second, the flashover voltage with an external electrostatic electromagnetic pulse field is taken into account. The external field producing horizontal and vertical electric field components between the electrodes is fully investigated. Third, experimental results on the electrostatic electromagnetic-pulse-induced PTFE surface flashover using a needle-plate electrode structure are analyzed and discussed indetail. All findings are supported by the proposed SEEA model in an electrostatic protection using PTFE material.

Corresponding author: Hsiung-Cheng Lin




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