CELIAS - Charge, Element and Isotope Analysis System for SOHO

Details CELIAS - Charge, Element and Isotope Analysis System for SOHO CELIAS - Charge, Element and Isotope Analysis System for SOHO

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..162..441h&link_type=abstract

Solar Physics, Volume 162, Issue 1-2, pp. 441-481

Physics

138

Soho, Solar Wind, Solar Energetic Particles, Composition Measurements, Time-Of-Flight Spectrometer

Scientific paper

The CELIAS experiment on SOHO is designed to measure the mass, ionic charge and energy of the low and high speed solar wind, of suprathermal ions, and of low energy flare particles. Through analysis of the elemental and isotopic abundances, the ionic charge state, and the velocity distributions of ions originating in the solar atmosphere, the investigation focuses on the plasma processes on various temporal and spatial scales in the solar chromosphere, transition zone, and corona. CELIAS includes 3 mass- and charge-discriminating sensors based on the time-of-flight technique: CTOF for the elemental, charge and velocity distribution of the solar wind, MTOF for the elemental and isotopic composition of the solar wind, and STOF for the mass, charge and energy distribution of suprathermal ions. The instrument will provide detailed in situ diagnostics of the solar wind and of accelerated particles, which will complement the optical and spectroscopic investigations of the solar atmosphere on SOHO. CELIAS also contains a Solar Extreme Ultraviolet Monitor, SEM, which continously measures the EUV flux in a wide band of 17 70 nm, and a narrow band around the 30.4 nm He II line.

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