Figure 3: The predicted neutrino energy spectra at the position of the
detector for a 350 GeV proton beam.
Fig. 3 shows the predicted energy spectra for each neutrino
flavour for the upgraded WANF.
Tab. 1 gives the
average energies, contamination and expected number of events for
the envisaged experiment and
for a one year run consisting of 200 days.
We assume that the total number of protons on target is 
per year,
and that the fiducial target mass and area are 2.4 tons and 
,
respectively.
A global efficiency of 
has been taken into account.
Table 1: Relative abundance of neutrino species
Further improvements for the WANF are expected by:
per 19.2 s SPS supercycle.
A new neutrino facility (NuMI) is being planned using a proton beam
from the Fermilab Main Injector.
A short base line experiment (COSMOS)
on the Fermilab site would search for 
oscillation.
Thanks to its higher repetition rate (1.9 s compared to 19.2 s cycle
length at the SPS) and the longer running time per year (300 days)
envisaged, the NuMI is expected to provide about 8 times more protons
per year than the WANF. However, the higher proton energy
of the SPS (350 GeV compared to 120 GeV) compensates this difference to a large extent.
The higher proton energy results in a higher 
production efficiency and
interaction probability.
For a search an additional factor of
comes from the strong suppression of 
interaction
probability at the lower energy.
The envisaged short baseline station at NuMI is only 1.5 times better
than the one at CERN.
If also the larger detector fiducial mass (2.4 tons compared to
0.8 tons for COSMOS) is taken into account the experiment described here
would obtain per year 
effective
CC interactions above threshold
to be compared to 
per year
projected for the COSMOS experiment.