A low energy ion sensor for space measurements with reduced photo-sensitivity

Computer Science

Scientific paper

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Ion Currents, Photosensitivity, Radiation Counters, Spacecraft Instruments, Electric Current, Photoelectric Emission, Prototypes

Scientific paper

A low energy ion detector designed to reduce the contribution of photoelectrons to the measured sensor current is described. The ion collector is shielded from direct solar illumination and the internal configuration accelerates the incoming ions onto this collector. Satellite measurements show that the photocurrent to ion current ratio is reduced by a factor of four with this new configuration. Results from the new sensor are compared with simultaneous measurements using a planar electrostatic analyzer on the same satellite.

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