Authors: Ipavich, F.M., J.A. Paquette, P. Bochsler, S.E. Lasley,
P. Wurz
Reference: Proceedings of the Joint SOHO/ACE workshop, AIP
conference proceedings, revised, 2001.
Abstract:
The MTOF sensor uses time of flight measurements in a harmonic
potential region to identify elements and isotopes in the solar wind
with
excellent mass resolution. The combination of MTOF's large bandwidth
electrostatic deflection system and the 3-axis stabilized orientation of
SOHO
results in excellent counting statistics. We report relative abundances
of the
Iron isotopes with mass 54, 56 and 57. Since these isotopes are
chemically
identical, we expect essentially no fractionation either in the solar
wind or in
the instrument, resulting in relatively small estimated uncertainties.
Our
results agree, within the measurement uncertainties, with terrestrial
values.