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Cross-section of experimental setup (not to scale).
Exponential dependence of discharge rate on charge density.
Discharge rate vs (a) filament current, (b) acceleration voltage, and (c) main volume nitrogen pressure. The crosses in (a) represent direct measurement of electron flux.
Contour plots of charge density before (left) and after (right) discharging. Each contour corresponds to 2 × 10−13 C/cm2.
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