Authors: Hovestadt, D.; Geiss, J.; Gloeckler, G.; Moebius, E.; Bochsler, P.; Gliem, F.;
Ipavich, F. M.; Wilken, B.; Axford, W. I.; Balsiger, H.
Reference: In ESA, The SOHO Mission. Scientific and Technical Aspects of the Instruments
p 69-74 (SEE N90-13302 04-92)
Abstract:
The CELIAS (charge, element, and isotope analysis system) experiment on
SOHO (solar and heliospheric observatory) is described. It 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 velocity distributions of ions originating in the
solar atmosphere, the investigation focuses on studying the plasma
processes on various temporal and spatial scales in the solar
chromosphere, transition zone, and corona. CELIAS includes three mass
and charge discriminating sensors based on the time-of-flight
technique. These intruments provide detailed in situ diagnostics of the
solar wind and of accelerated particles, which complement the optical
and spectroscopic investigations of the solar atmosphere carried out by
SOHO.