  A novel charged particle tracking device, a high precision time projection
chamber with gas electron multiplier and pad readout, is a leading candidate as
the central tracker for an experiment at the International Linear Collider. To
characterize the performance of such a system, a small TPC has been operated
within a magnetic field, measuring cosmic-ray and laser tracks. Good tracking
resolution and two particle separation, sufficient for a large scale ILC
central tracker, are achieved.
