A few pictures of the TPC The XENON Control Building sits beside the water tank. The cryostat hangs from the support structure within the water tank. Experts construct the top PMT array. The top PMT array with all of the electric cables. The bottom PMT array. The electric field cage is assembled. The electric field cage and the bottom PMT array meet for the first time. The TPC is complete. The TPC is secured within the cryostat.