Solar Particle Composition on SOHO: First Measurements From the CELIAS Experiment

F.M. Ipavich, D. Hovestadt, P. Bochsler, H. Grünwaldt, M. Hilchenbach, K.-U. Reiche, W.I. Axford, H. Balsiger, A. Bürgi, M. Coplan, A.B. Galvin, J. Geiss, F. Gliem, G. Gloeckler, K.C. Hsieh, R. Kallenbach, B. Klecker, M.A. Lee, S. Livi, G.G. Managadze, E. Marsch, E. Möbius, M. Neugebauer, M. Scholer, M.I. Verigin, B. Wilken, and P. Wurz

Paper presented at the AGU Spring Meeting, Baltimore, MD, USA, EOS (1996).

The CELIAS experiment for the measurement of the mass, ionic charge, and isotopic abundance of the solar wind and of suprathermal particles was successfully launched with SOHO spacecraft on 2 Dec 1995. CELIAS consists of 3 sensors based on time of flight measurements: CTOF and MTOF are optimized for studying the charge and Mass distributions, respectively, of the solar wind; and STOF is designed to measure Suprathermal particle composition and charge states. Early results from CELIAS indicate the presence of a number of elements (e.g Cr and Ni) not previosly identified in the solar wind. A rich assortment of solar wind isotopes has also been identified for the first time, many of which (e.g. Fe 54 and 56; Ni 58, 60, 62) have not been detected either in solar energetic particle populations or using spectroscopic techniques.

Return to the CELIAS publication page
Return to the CELIAS home page

Last Update: October 8, 1996, Peter Wurz