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Intrinsic failure events in gated field emitters have been studied. The gate-emitter voltage, typically 140 V during operation, drops to 10-70 V at the onset of the failure. Measurements with a diagnostic probe indicate that plumes of ions and electrons are ejected into vacuum with the ion current typically 10% of the electron current. The arc voltage and(More)
Gated field emission wedges of varying lengths have been fabricated and tested. These wedges emit at 180-200 V from multiple emission sites that are approximately evenly distributed along the wedge. This results in emission currents that scale with the length of the wedge. The maximum emission current observed is about 0.1 mu A/ mu m of wedge length, beyond(More)
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