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1. (WO2009124183) SOLAR POWERED EXCESS ELECTRON EMISSION DEVICE

Pub. No.:    WO/2009/124183    International Application No.:    PCT/US2009/039288
Publication Date: Oct 8, 2009 International Filing Date: Apr 2, 2009
IPC: B64G 1/44
Applicants: SRI INTERNATIONAL
ADAMO, Richard, C.
Inventors: ADAMO, Richard, C.
Title: SOLAR POWERED EXCESS ELECTRON EMISSION DEVICE
Abstract:
The chassis of a spacecraft has one side exposed to ultraviolet photons and another side shielded from the ultraviolet photons. An electrically conductive surface is disposed on the exposed side of the chassis and is electrically isolated from the chassis. A field-emission array device has a gate, an emitter array, a first terminal electrically connected to the gate, and a second terminal electrically connected to the emitter array. The first terminal electrically couples the gate to the electrically conductive surface on the exposed side of the chassis, and the second terminal electrically couples the emitter array to a surface on the shielded side of the chassis. The emitter array discharges electrons from the surface on the shielded side when a voltage difference in excess of a threshold voltage develops between the gate and the emitter array because of differential charging of the exposed and shielded sides of the chassis.