The Giotto three-dimensional positive ion analyser

Details The Giotto three-dimensional positive ion analyser The Giotto three-dimensional positive ion analyser

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jphe...20..795j&link_type=abstract

Journal of Physics E - Scientific Instruments (ISSN 0022-3735), vol. 20, pt. 2, June 1987, p. 795-802. Research supported by SER

Physics

34

Giotto Mission, Halley'S Comet, Ion Probes, Energy Distribution, Satellite-Borne Instruments, Solar Wind

Scientific paper

An instrument to measure the three-dimensional energy distribution of positive ions in order to study the interaction between the solar wind and ionized Halley cometary particles was designed. Two sensors measure the distribution from 10 eV to 20 keV once per spacecraft spin and the distribution from 90 eV to 90 keV, with coarse mass discrimination, once every 32 spins. The instrument was turned on September 8, 1985. The performance throughout all testing was nominal. The spacecraft was greater than 10 million km from the earth in the solar wind. The only population identified is the solar wind. The Fast Ion Sensor follows solar wind variations with its autoranging capability. The Implanted Ion Sensor identifies higher mass ions such as O(6+) and O(5+) in the solar wind.

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