Authors: Bamert, K., R.F. Wimmer-Schweingruber, R. Kallenbach, M.
Hilchenbach, B. Klecker
Reference: EGS, Nice, France, 2001
Abstract:
We present first results of suprathermal particles associated with
the July 14, 2000 event observed with the (Highly) Suprathermal
Time Of Flight ((H)STOF) mass spectrometer onboard SOHO.
An X-class flare was detected at 1024 UT by SOHO/EIT and the onset of a
halo CME at 1054 UT by SOHO/LASCO.
STOF measures the elemental and ionic composition of ions with suprathermal
energies in the range 20--4000 keV/amu, i.\,e. from above the solar
wind up to low-energy flare particle
energies. We investigate the evolution of the abundance ratio Fe/CNO
around the onset of the event and in association with the strong
interplanetary shock on July 15 at 1420 UT.
We also report on the charge-state composition of He and Fe,
and the energy dependence of the mean ionic charge state of Fe in the
energy
per nucleon ranges 12--50 and 50--100 keV/amu
during these two time periods.