Computer Science
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981kosis..19..239i&link_type=abstract
Kosmicheskie Issledovaniia, vol. 19, Mar.-Apr. 1981, p. 239-243. In Russian.
Computer Science
Electric Potential, Ionospheric Ion Density, Mass Spectroscopy, Space Plasmas, Spacecraft Charging, Heavy Ions, Ionization Potentials, Ionospheric Composition, Light Ions, Onboard Equipment, Particle Mass, Zero Angle Of Attack
Scientific paper
An analysis is presented of the influence of the electric potential of the satellite on the efficiency of ionospheric-ion collection by mass-spectrometer analyzers onboard the satellite. The analysis is carried out on the basis of Iaichnikov's (1974) formulas describing ion-collection efficiency as a function of the temperature and density of ionospheric constituents, satellite velocity, the parameters of the ion-optic system of the analyzer, and the satellite potential. It is found that the influence of the negative potential of the satellite on the collection efficiency is manifested in variations of the parameters of the ion-optic system: namely, the negative potential determines discrimination with respect to ion mass (the efficiency of collection of light ions being greater than that of heavy ions), and the discrimination with respect to mass is minimum for zero angle of attack and increases with the angle.
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