Observation of low-energy charged particles by the SF-3M spectrometer on board the Cosmos-1809 satellite

Computer Science – Sound

Scientific paper

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Cosmos Satellites, Ionospheric Sounding, Plasma Interactions, Radiation Counters, Satellite-Borne Instruments, Spacecraft Charging, Mass Spectrometers, Photomultiplier Tubes, Upper Ionosphere, Vacuum Chambers

Scientific paper

The general design and calibration of the SF-3M spectrometer on board the Cosmos-1809 satellite (launched on July 18, 1986), which uses a secondary electron multiplier and a toroidal electrostatic analyzer to study low-energy electrons and ions, are described, and examples of measurements are presented. It is noted that the principal disadvantage of such analyzers is a strong defocusing of the detected particles, especially electrons. Although the interpretation of the results requires additional analysis, instruments of this type are still viable where small size and weight are important considerations.

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