The Muon Forward Tracker (MFT) is Silicon tracking detector designed to add vertexing capabilities to the muon spectrometer. It will allow ALICE to extend the precision measurements of the QGP fundamental properties towards the forward rapidity region. The MFT will substantially improve the present performance of the muon spectrometer and open the path to new measurements not accessible with the present apparatus (open charm/beauty separation, ψ in central Pb–Pb collisions and J/ψ from b-hadron decays measurements).
The MFT detector surrounds the vacuum beam-pipe, it is positioned inside the ITS outer barrel and along the beam axis between the ITS inner barrel and the front absorber of the muon spectrometer.
The MFT consists of two half-cones containing five detection half-disks placed along the beamsaxis between −460 mm and −768 mm away from the interaction point. It covers the pseudo-rapidity domain −3.6 < η < −2.5. The basic detection element is a silicon pixel sensor, developed for both ITS and MFT. The 920 silicon pixel sensors of the MFT have been assembled, using the same technology as for the new ITS, on 280 ladders of 1, 2, 3, 4 or 5 sensors each. The read-out electronics, common to both ITS and MFT, has been jointly developed by the two projects.