Gluon Contribution to Proton Spin and the Connection to Forward Calorimetry at STAR

The proton has an intrinsic spin derived from its quark and gluon components. While the quark spin contribution to the spin of the proton is relatively well known, the gluon spin contribution is comparatively poorly constrained. The STAR (Solenoidal Tracker at RHIC) collaboration is working to constrain this value by analyzing spin-polarized proton collisions. One analysis uses neutral pions (𝛑0s) detected by the Endcap Electromagnetic Calorimeter (1<η<2). We measure the number of 𝛑0s from same and opposite helicity collisions and calculate the production asymmetry, which is related to the gluon contribution. We are beginning to analyze the dataset from 2013, which is about three times the size of the 2012 dataset, whose analysis is more mature. Currently at Brookhaven National Laboratory, the Forward Meson Spectrometer (FMS, 2.5<η<4.0), which was used for the measurement of forward 𝛑0s, is being decommissioned for the installation of a forward upgrade (2.5<η<4.0) which in addition to tracking will feature electromagnetic and hadronic calorimetry as part of a Forward Calorimeter System (FCS). I will discuss the Run 13 𝛑0 asymmetry analysis, FMS decommissioning, and proposed upgrade.