  A Time-Projection Chamber (TPC) called the SAMURAI Pion-Reconstruction and
Ion-Tracker (S$\pi$RIT) has recently been constructed at Michigan State
University as part of an international effort to constrain the symmetry-energy
term in the nuclear Equation of State (EoS). The S$\pi$RIT TPC will be used in
conjunction with the SAMURAI spectrometer at the Radioactive Isotope Beam
Factory (RIBF) at RIKEN to measure yield ratios for pions and other light
isospin multiplets produced in central collisions of neutron-rich heavy ions,
such as $^{132}$Sn + $^{124}$Sn. The S$\pi$RIT TPC can function both as a TPC
detector and as an active target. It has a vertical drift length of 50 cm,
parallel to the magnetic field. Gas multiplication is achieved through the use
of a multi-wire anode. Image charges are produced in the 12096 pads, and are
read out with the recently developed Generic Electronics for TPCs.
