Abstract
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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Arnaud, M. and Rothenflug, R.: 1985,Astron. and Astroph. Suppl. Ser. 60, 425
Breneman, H. H. and Stone, E. C.: 1985,Astrophys. J. 299, L57
Gloeckler, G., Geiss, J., Roelof, E. C., Fisk, L. A., Ipavich, F. M., Ogilvie, K. W., Lanzerotti, L. J., von Steiger, R., and Wilken, B.: 1994,J. Geophys. Res. 99, 17637
Gonin, M.: 1994,PhD Thesis, University of Bern, Bern, Switzerland,
Grünwaldt, H., et al.: 1990, SOWICOMS: An Instrument for Energy, Mass, and Charge Determination in Solar Wind and Mars Environment, inManufacturing of Scientific Space Instrumentation, Academy of Science of the USSR, 7
Hsieh, K. C., Shih, K. L., Jokipii, J. R., and Grzedzielski, S.: 1992,Ap. J. 393, 756
Lee, M. A.: 1983,J. Geophys. Res. 88, 6109
Luhn, A., Hovestadt, D., Klecker, B., Scholer, M., Gloeckler, G., Ipavich, F. M., Galvin, A. B., Fan, C. Y., and Fisk, L. A.: 1985,Proceedings ICRC 4, 241
Moebius, E., Hovestadt, D., Klecker, B., Scholer, M., Gloeckler, G., Ipavich, F. M.: 1984,Nature 318, 426
Moebius, E.: 1986,Adv. Space Res. 6, 199
Oetliker, M.: 1993, CTOF, A Solar Wind Time of Flight Mass Spectrometer with High Charge Resolution: Numerical Simulations and Calibrations, PhD thesis, University of Bern
Von Steiger, R. and Marsch, E.: 1994,Space Sci. Rev., in press
Von Steiger, R. amd Geiss, J.: 1994 Composition of the solar wind, inCosmic Winds and the Heliosphere, ed(s).,Jokipii, J. R., Sonett, C. P. andGiampapa, M. S., University of Arizona Press, Tucson
Widing, K. G. and Feldman, U.: 1993,Astrophys. J. 416, 392
Author information
Authors and Affiliations
Additional information
Principal-Investigator
Principal-Investigator for data phase
Rights and permissions
About this article
Cite this article
Hovestadt, D., Hilchenbach, M., Bürgi, A. et al. CELIAS - Charge, Element and Isotope Analysis System for SOHO. Sol Phys 162, 441–481 (1995). https://doi.org/10.1007/BF00733436
Issue Date:
DOI: https://doi.org/10.1007/BF00733436