The Implanted Ion Spectrometer (IIS) is part of the solar wind ion plasma analyser JPA in the payload of the European Giotto mission to Comet Halley (1986 III). The IIS complements the observation of the solar wind bulk parameter by its focus on the acceleration of ionised cometary gases and its interaction with the solar wind plasma. The state of the art low-power/low-weight signal conditioning unit (SCU) of the implanted ion spectrometer features several new concepts. A novel FINDER unit provides the possibility to operate all sensors of the multisensor spectrometer simultaneously, thus avoiding adverse duty cycle effects. A complete functional test of all major IIS components and IIS related elements in the DPU is obtained from a new scheme for in-flight calibration. Functional principles of the key components in the SCU which have significance for the data analysis are described.
The Giotto Implanted Ion Spectrometer (IIS): principles of the electronic operation and data collection
Das Ionen-Spektrometer des Giotto-Raumfahrzeuges: Funktionsprinzipien der Messdatenerfassung
Journal of Physics E: Scientific Instruments ; 20 , 12 ; 1510-1516
1987
7 Seiten, 10 Quellen
Article (Journal)
English
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