  We study the possibilities offered by muon storage rings for tau-neutrino
appearance experiments due to nu_mu to nu_tau and nu_e to nu_tau oscillations.
Tau event rates for such experiments are first discussed with a view to
examining their variation prior to the inclusion of experimental cuts, in order
to better understand how baselines, beam energies, forward peaking of decay
neutrinos with increasing energies and average fluxes intercepted by detectors
of various sizes can affect their optimization. Subsequently, event rates
implementing cuts are computed for hadronic and wrong-sign lepton decay modes
and used to plot 90% C.L. contours for the parameters that can be explored in
such experiments. The expected scaling of the contours with energy and baseline
is discussed. The results show that even for modest muon beam energies,
convincing coverage of the Super Kamiokande parameters is possible. In
addition, very significant enlargement of present-day bounds on the mass and
mixing parameters of all types of neutrino oscillations is guaranteed by such
searches.
