Authors: F.M. Ipavich, J.A. Paquette, P. Bochsler, S.E. Lasley, P. Wurz,
H. Grunwaldt, M. Hilchenbach, G. Gloeckler, J. Geiss, and D. Hovestadt
Reference: Spring AGU Conference 2000
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. We compare our results
obtained in different solar wind flow types with those derived from meteoritic
measurements.