The following plots depict track phi versus track pT , for pT<30 GeV (Figure1) and for 30GeV<pT<50GeV (Figure2), both East and West regions of the TPC combined. The tracks on the East side are plotted on the negative x-axis. Figure 1 and Figure 2 are for 500 GeV and Figure 3 and Figure 4 are for 200 GeV : 

Figure 1

Figure 2

Figure 3

Figure 4