Aging performance of the BaBar Drift Chamber

The BaBar Drift Chamber has been operating since May 1999 at the PEP-II B-Factory, integrating a total of 140 fb/sup -1/ luminosity in e/sup +/e/sup $/collisions at /spl radic/s /spl sim/ 10.6 GeV. The chamber has accumulated a dose of approximately 10.6 mC/cm. The performance of the drift chamber with respect to aging (efficiency, gain, resolution) will be presented, along with projections over its expected lifetime.