  This paper presents the first experimental sputtering yields for sulphur ions
with energies between 10 keV and 140 keV irradiating water ice films on a
microbalance. The measured sputtering yields exceed theoretical predictions
based on other ion species by a factor of 2 to 3 for most energies. Moreover,
the sputtering yield of SF+ molecules is compared to the yield of atomic
species S+ and F+. As found for atomic versus molecular oxygen, the sputtering
yield caused by molecules is two times higher than expected. Finally, the
implications of the enhanced sulphur sputtering yield for Europa's atmosphere
are discussed.
