Construction and Performance of the Mu2e Charged Particle Tracker at Fermilab*

The "Mu2e" experiment is now under construction at the Fermi National Accelerator Laboratory and when complete will search for the coherent muon-to-electron conversion with a sensitivity 10,000 times better than the current sensitivity. This large increase in sensitivity will probe many well motivated physics models beyond the standard model. Central to achieving this sensitivity goal is a very low mass high-speed charged particle tracker that can operate in high radiation and magnetic fields. The charged particle tracker must measure the 105 MeV/c conversion electron momentum with high precision and reject background mechanisms that can fake a conversion electron. The tracking system is made from more than 20,000 low-mass straw tubes which are built into tracker panels, these panels are assembled into 36 tracker planes that intercept the conversion electron helix. The Mu2e tracker design, construction status and performance of tracker panels will be presented.