  This paper describes the performance and sensitivity to neutrino mixing
parameters of a Magnetised Iron Neutrino Detector (MIND) at a Neutrino Factory
with a neutrino beam created from the decay of 10 GeV muons. Specifically, it
is concerned with the ability of such a detector to detect muons of the
opposite sign to those stored (wrong-sign muons) while suppressing
contamination of the signal from the interactions of other neutrino species in
the beam. A new more realistic simulation and analysis, which improves the
efficiency of this detector at low energies, has been developed using the GENIE
neutrino event generator and the GEANT4 simulation toolkit. Low energy neutrino
events down to 1 GeV were selected, while reducing backgrounds to the $10^{-4}$
level. Signal efficiency plateaus of ~60% for $\nu_\mu$ and ~70% for
$\bar{\nu}_\mu$ events were achieved starting at ~5 GeV. Contamination from the
$\nu_\mu\rightarrow \nu_\tau$ oscillation channel was studied for the first
time and was found to be at the level between 1% and 4%. Full response matrices
are supplied for all the signal and background channels from 1 GeV to 10 GeV.
The sensitivity of an experiment involving a MIND detector of 100 ktonnes at
2000 km from the Neutrino Factory is calculated for the case of $\sin^2
2\theta_{13}\sim 10^{-1}$. For this value of $\theta_{13}$, the accuracy in the
measurement of the CP violating phase is estimated to be $\Delta
\delta_{CP}\sim 3^\circ - 5^\circ$, depending on the value of $\delta_{CP}$,
the CP coverage at $5\sigma$ is 85% and the mass hierarchy would be determined
with better than $5\sigma$ level for all values of $\delta_{CP}$.
