A satellite-borne ion mass spectrometer for the energy range 0 to 16 keV

Details A satellite-borne ion mass spectrometer for the energy range 0 to 16 keV A satellite-borne ion mass spectrometer for the energy range 0 to 16 keV

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ssi.....2..499b&link_type=abstract

Space Science Instrumentation, vol. 2, Sept. 1976, p. 499-521. Research supported by the Max-Planck-Gesellschaft and NASA; Swiss

Computer Science

11

Geos Satellites (Esa), Magnetospheric Ion Density, Mass Spectrometers, Plasma Diagnostics, Satellite-Borne Instruments, Abundance, Helium Ions, Hydrogen Ions, Metal Ions, Outgassing, Oxygen Ions, Particle Mass, Radiation Counters

Scientific paper

The Ion Composition Experiment (ICE) on GEOS represents the first comprehensive attempt to measure the positive ion composition at high altitudes in the magnetosphere. Due to the heterogeneous nature of the magnetospheric plasma a novel mass spectrometer has been developed to cover the mass per charge range from H-1(+) to beyond Ba-138(+) and the energy per charge range from 0 to 16 keV/e. The ICE consists primarily of a cylindrical electrostatic analyzer followed by a curved analyzer incorporating crossed magnetic and electric fields. This combination has limited angular and energy focusing properties, but it maintains a mass resolution of about 4 over a wide range in energy and mass, sufficient for the objectives of measuring plasmas of both solar and terrestrial origin. High sensitivity and low background should allow measurements of rarer ion constituents down to flux levels of 0.01 ions/sq cm sec ster eV. A sophisticated electronics combined with powerful ground computer and telecommand systems allow for very efficient scanning of the mass-energy space.

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