Central Tracker - TPC

The TPC is implemented closely to that described in the CDR. At present simple, constant, $r\phi$ and $z$ resolutions are assumed although the functionality exists for z-dependent resolutions as well as statistical effects involving the number of ionisation electrons. This is all treated in the routine GUSTEP and the hits stored in the array TPCHITS. As with all tracking detector hits they are included in the common /CHGTRAK/ described below.

The TPC is segmented into 118 radial rings and then smeared in $r\phi$. The $z$-position is also smeared according to the input values in UGEOM.