Continuous and breakdown currents in cold-plasma coated Mylar[reg sign] foils under irradiation by nonpenetrating electron beams

Journal Article · Thu Apr 01 00:00:00 EST 1993 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/23.212321· OSTI ID:6397024

Gross, B; Guenther, P ^[1]

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1. Technical Univ. of Darmstadt (Germany)

Breakdown and flash-over effects are known to occur in thin polymer foils used as thermal blankets in space satellites, where they are exposed to irradiation by nonpenetrating space electrons. These effects are investigated by means of a Split Faraday Cup system mounted under an electron gun [1]. Continuous and breakdown currents are measured from a metal ring electrode at the surface of incidence and from a rear electrode, respectively. The equivalent circuit of the system is developed. Measurements were carried out on Mylar foils uncoated or coated with aluminum, plasma-deposited SiO[sub 2] or Si[sub 3]N[sub 4](p-SiO[sub 2] or p-Si[sub 3]N[sub 4]), or electron-beam evaporated SiO[sub 2]. It was found, that some plasma-deposited coatings form a conductive layer under irradiation and reduce breakdown effects. But after termination of the electron bombardment discharge and breakdown effects were observed for all samples except those aluminized on both surfaces.

• OSTI ID: 6397024
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Vol. 40:2; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MYLAR
PHYSICAL RADIATION EFFECTS
ALUMINIUM
BREAKDOWN
COATINGS
ELECTRON BEAMS
EXPERIMENTAL DATA
FLASHOVER
FOILS
IRRADIATION
SAMPLE PREPARATION
SATELLITES
SILICON NITRIDES
SILICON OXIDES
BEAMS
CHALCOGENIDES
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELEMENTS
ESTERS
INFORMATION
LEPTON BEAMS
MATERIALS
METALS
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
PNICTIDES
POLYESTERS
POLYMERS
RADIATION EFFECTS
SILICON COMPOUNDS
SYNTHETIC MATERIALS
360605* - Materials- Radiation Effects