Fundamental Technologies

Ulysses HISCALE Pages

Ulysses HISCALE Contributions to the 24th International Cosmic Ray Conference

N. Krupp, R. B. Decker, L. J. Lanzerotti, E. Keppler, S. M. Krimigis, and R. E. Gold, Comparison of Recurrent Ion Events Using Ulysses HI-SCALE and EPAC and Voyager LECP Data, Proc. 24th International Cosmic Ray Conference, 4, 431, 1995.

Abstract (draft). We compare the absolute fluxes of Z ≥ 1 ions (40-5000 keV) during recurrent ion events (CIR) measured aboard the Ulysses spacecraft in 1991 with those of similar recurrent events from measurements of the Voyager spacecraft in 1978. Thus the comparison is made were Ulysses and Voyager between 3.5 and 5 AU, and also approaching Jupiter. We also use Ulysses EPAC measurements of protons 0.6-1.0 MeV to examine detailed angular distributions during one of the CIR events in 1991.

C. G. Maclennan and L. J. Lanzerotti, Anomalous Cosmic Ray Oxygen (-2.5 MeV/nucl) at High Southern Heliolatitudes on Ulysses, Proc. 24th International Cosmic Ray Conference, 4, 505, 1995.

Abstract (draft). Results are presented for the heliolatitude dependence of the fluxes of anomalous cosmic ray oxygen as measured at southern solar latitudes above the heliospheric current sheet by the HISCALE instrument in the Ulysses spacecraft. Little if any evidence is found for a latitude gradient for particles of energy ~2.5 MeV/nucl. Anomalous cosmic ray oxygen particles of this energy appear to be excluded from the ecliptic plane at 1 AU.

D. J. Thomson, L. J. Lanzerotti, and C. G. Maclennan, Time Series Analysis of Low Energy Interplanetary Charged Particle Fluxes and Interplanetary Magnetic Field Data, Proc. 24th International Cosmic Ray Conference, 4, 435, 1995.

Abstract (draft). Time series analysis of charged particle data from an instrument on the Ulysses spacecraft and magnetic field data from near-Earth spacecraft show that the spectra are composed of numerous discrete spectral lines that can account for as much as 80% of the variances of some data sets. At frequences in the range 1 to 140 μHz the spectral components are consistent with those theoretically estimated for solar g-modes. 

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Last modified January 23, 2006
T. Hunt-Ward