  The electronic states of a mesoscopic ring are assessed in the presence of
Rashba Spin Orbit coupling and a $U(1)$ gauge field. Spin symmetric coupling to
an ideal lead is implemented following B\"uttiker's voltage probe. The exact
density of states is derived using the reservoir uncoupled eigenstates as basis
functions mixed by the reservoir coupling. The decay time of uncoupled electron
eigenstates is derived by fitting the broadening profiles. The spin and charge
persistent currents are computed in the presence of the SO interaction and the
reservoir coupling for two distinct scenarios of the electron filling fraction.
The degradation of the persistent currents depends uniformly on the reservoir
coupling but nonuniformly in temperature, the latter due to the fact that
currents emerge from different depths of the Fermi sea, and thus for some
regimes of flux, they are provided with a protective gap. Such flux regimes can
be tailored by the SO coupling for both charge and spin currents.
