Open Charm Production in $\sqrt{s_{NN}}=200 GeV$ Cu+Cu collisions at Forward Rapidities

Open charm production is an important probe of the strongly interacting matter created during the early stages of heavy ion collisions. Single muons are used to tag open charm production via semileptonic decays of D-mesons. The PHENIX detector at RHIC is used to measure single muon production at forward and backward rapidities over the range of $1.1 > | \eta | > 2.25$. PHENIX has previously measured single muon production for p+p collisions at $\sqrt{s_{NN}}=200 GeV$, which is used as a baseline measurement for calculating the Nuclear Modification Factor ($R_{AA}$) for heavy ion collisions. The status of the first measurement in Cu+Cu collisions at $\sqrt{s_{NN}}=200 GeV$ of single muon cross sections and nuclear modification factors as a function of transverse momentum will be presented.