Fluctuations in Transverse Energy at high pseudorapidty using the PHENIX Muon Piston Calorimeter

The PHENIX Muon Piston Calorimeter (MPC) is being used to measure transverse energy fluctuations from Au+Au collisions produced by the Relativistic Heavy Ion Collider (RHIC) in 2010 as part of the beam energy scan program. The PHENIX data set from that year includes Au+Au collisions at $\sqrt{S_{NN}}$ = 200, 62.4, 39, and 7.7 GeV. Nonmonotonic behavior of these fluctuations as a function of beam energy could indicate the existence of a critical point in the QCD phase diagram. Their dependence on collision centrality will also be investigated. Progress in making these measurements with the 200 GeV data will be reported.