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Temporal and Spatial Correlations in Electron-induced Arcs of Adjacent Dielectric Islands
IEEE Tran. Plasma Science
  • Justin Christensen, Utah State University
  • JR Dennison, Utah State Univesity
  • Justin Dekany, Utah State University
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This study investigates very short duration (<1ms) flashes caused by rapid discharge arcs from isolated charged insulating epoxy “glue dots” to an underlying grounded substrate while under electron bombardment. The possibility that a given arc might stimulate arcs in adjacent “glue dots” was investigated through coincidence correlation analysis, as was the dependence of such correlations with “glue dot” separation. Most arcs were found to be random localized events, which occurred only when built up charge produced an electric field large enough for electrostatic breakdown to occur. However, for 40 keV incident beams, some correlation was observed. It is hypothesised that at higher energies more samples are charged close to the breakdown field at any given time and that a discharge in one “glue dot” might cause a sudden electric field spike in neighbouring “glue dots” which could trigger premature arcing. Such stimulated arc rates might reasonably be expected to scale with electric field intensity. A power law fit to the arc data found a power of -1.06±0.09, consistent with a field falling off inversely with separation distance for charges spreading out across a 2D conducting surface.
Citation Information
Justin Christensen, JR Dennison and Justin Dekany. "Temporal and Spatial Correlations in Electron-induced Arcs of Adjacent Dielectric Islands" IEEE Tran. Plasma Science (2017)
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