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Fig. 2

image

Sketch of the COPS ram gauge. The main components are: (a) a 60 mm diameter spherical equilibrium cavity with a round 6 mm opening pointing towards 67P; (b) an inner shield; (c) a microtip field emitter device; (d) a 19 mm in height and 8 mm in radius anode at +180 V; and (e) an electron repeller.

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